What insulation mice don’t eat: how to protect polystyrene foam and polystyrene foam

When choosing a thermal insulation material, many factors need to be taken into account. Among them are thermal conductivity, rigidity, moisture resistance, vapor permeability, and the most banal thing, price. And everything would be fine, but you need to take into account not only your capabilities, but also... rodents. Many home owners, having discovered that there were mice in the insulation, realized that the cost of the mistake was very high. There was often a need to completely restore the insulating pie. We will discuss three possible situations:

What materials do rodents breed in?
How to protect thermal insulation during construction?
How to get rid of “guests” if they are already “here”?

Why do mice like to live in penoplex?

Penoplex (extruded polystyrene foam) is a finely porous material with numerous air-filled cells.
The insulation is inexpensive, but at the same time it is durable, has a low level of thermal conductivity, moisture resistance and resistance to fungal infections. It is also important that polystyrene boards do not swell or warp when painted, treated with glue or plastered. If the basic rules are followed when installing thermal insulation and the insulation is protected from rodents, it can last fifty years or more. Mice appear in the house in the fall, with the onset of the first cold weather, when there is nothing left to profit from in the fields. This is the time to think about creating a warm mink and accessible food. Penetrating through cracks, holes, and ventilation holes in a person’s home, the animals easily gnaw through pliable polystyrene.

As you know, rodents do not eat synthetic insulation, but feed on food products and waste. Polystyrene slabs are just an obstacle on the way to the desired food, which can always be found in a summer house closed for the winter, in a trash can or in the kitchen of a careless housewife. By gnawing labyrinths in the insulation, mice thereby destroy the structure and reduce the functionality of the material, literally turning it into dust. In this case, the damage can be more than 80%.

Mice, unlike rats, move in groups and live in families. If one individual appears in the house, a dozen more will come running after it. Therefore, if you hear a characteristic crunch or squeak, you must immediately take action.

What's the attraction?

According to many experiments conducted and the experience of numerous ordinary people who use soft material for construction needs, which are all types of mineral wool, the toothy guards are not particularly afraid. Even the notorious glass wool - a rather prickly and skin-irritating substance - is not an obstacle for the ears. Moreover, in all these insulation materials, the newborns feel comfortable, make moves with pleasure and create cozy and warm nests inside.

In addition, rodents, although not entirely intellectually developed creatures, understand perfectly well that soft cotton wool is the best place to organize your own house, because it:

doesn't rot,
does not spoil
has good ventilation properties,
it's always warm and dry there,
and the structure of the fibers holds its shape perfectly.

But mice do not live in ecowool, despite the fact that it is made of organic and seemingly edible material. Why? It's simple: in addition to cellulose, the insulation contains orthoboric acid (borax), a chemical that causes extreme thirst and discomfort in animals. If a mouse suddenly decides to settle there, it will soon move to another, more suitable place for it.

By the way, there is an opinion that no matter what the soft insulation is, in terms of its constituent ingredients, mice can live in it purely hypothetically!

Therefore, when erecting a structure, they think in advance about carefully sealing cracks and technological holes so that rodents do not have the opportunity to climb inside and make a warm nest for themselves.

It is worth noting that official manufacturers of mineral wool, for example, Techno, Parok, Izover and some others, do not indicate its resistance to rodents in their descriptions of the characteristics of the material. At the same time, Rockwool claims the opposite and confidently reports that mice are not interested in their product. Although, most likely, the developer is disingenuous, since there are many messages from home repairers refuting this fact.

In connection with the above, we can conclude that mice not only breed in mineral wool, but also feel at ease there.

Why choose mineral wool?

When purchasing this or that insulation, it is always important how and in what form it is produced. For example, cotton wool manufacturers have taken care of convenience

On the building materials market you can buy it in this format:

roll;
mat;
cylinder;
placer;
plate.

The material in the form of a roll is convenient in that by using it you can obtain an even thermal insulation layer in which there will be no cold bridges. The option with slabs is ideal for vertical insulation. Firstly, it does not slip, and secondly, it is quite difficult to deform it during use.

Manufacturers strongly recommend using blown-in cotton wool to fill the most difficult-to-reach cavities. Today the choice is quite large and, if you need any specific parameters of density or thickness, you can easily find a suitable option on the goods market.

Material advantages

Another positive aspect of mineral wool is its non-flammability. This material can withstand heating up to 1000 degrees above zero without changing its physical properties. In this case, it is used, of course, as a fire protection element. In the event of a fire, it will be quite difficult to contain the thickness of the insulation, but toxic components will not be released.

This is due to the fact that a breathable layer is created that reliably protects the wall from rotting.

The material is durable. If you operate it correctly, then for 65-70 years you will not raise the issue of replacement. In slabs, cotton wool can hold its shape perfectly. This is achieved due to the fact that it is unable to:

deform;
crumple
dry out.

In matters of installation, it is also quite practical. It shrinks to the required dimensions during transportation and at the same time restores its shape within ten minutes. The material is cut with a standard knife. Now let's talk about what materials rodents appear in and how to deal with them.

List of disadvantages: how to overcome rodents?

Today, only one obvious negative point is known when choosing mineral wool. This is because cotton wool is hygroscopic.

When a material absorbs moisture, its thermal insulation properties are significantly reduced. When humidified by 2-3%, the thermal insulation characteristics immediately change by 10-11%

That’s why installation and vapor barrier are so important

Dusting also cannot be called a plus, but cotton wool is very rarely used for open structures. Therefore, this is rather not a minus, but simply a feature.

It is impossible to say unequivocally whether mice eat mineral wool. According to the latest numerous experiments and experiments, all varieties of mineral wool are not an obstacle to rodents. Even such a prickly and irritating material as glass wool is no problem for them. Among other things, mice are as comfortable as possible in almost any insulation. They make warm nests and live comfortably.

They are primarily attracted by the following characteristics:

does not rot;
almost never spoils;
high ventilation characteristics;
always dry;
warm;
excellent shape maintenance.

Although if we consider such an innovative material as ecowool, then there are no rodents there. Everything is quite simple. Ecowool contains orthoboric acid, which causes severe thirst and discomfort in animals. If a rodent decides to make a nest, it won’t last long; it will have to move soon.

What is penoplex

Penoplex is a lightweight material and has good sound insulation

Penoplex is a high-tech material produced by extrusion. During a high-temperature operation, under intense pressure, granulated polystyrene is foamed and then extruded into even, smooth slabs.

The catalyst for this operation is carbon dioxide with freon, after which the volatile substances evaporate and a finely porous cellular material is formed with cells isolated from each other and filled with air. The result is a product that is cheap, durable and reliable.

The range of application of this heat insulator is very wide: insulation of loggias with penoplex, facades, floors. Penoplex is also used for laying under railway tracks and airfield landing pads (you can read detailed information about what penoplex is used for here).

Some useful facts

In fact, representatives of the mouse order do not feed on insulating building materials at all, since they are inedible. The goal of these small animals is to create a cozy nest for their offspring, and they achieve this in an accessible way - they gnaw holes. To better convey the essence of the problem, we bring to your attention a number of facts obtained as a result of many years of practical observations:

The rodent invasion begins every year with the onset of cold weather.

It is more convenient for a field mouse to get into a human home, where there is warmth and food, than to dig a hole in the ground. It does not matter what technology was used to build a private house and what building materials were used during construction. There are always multiple routes used by pests to get inside. Mice can climb vertical walls

This is how they get onto the roof and settle on the ceiling, where the maximum amount of heat accumulates. Rats are very rare guests in residential buildings. They prefer food warehouses, granaries and other similar structures. If they appear in the house, it means that you are located too close to the pigsty and the feed barn, where these dangerous rodents came from.

Material properties

Penoplex is laid on a concrete screed after waterproofing with polyethylene or roofing felt.

The technical characteristics of penoplex make it attractive for use in the construction of low-rise structures and private and industrial construction:

the most important thing is the reduced thermal conductivity index, its value of 0.03 W*m*0C can compete with any insulation and will remain a winner;
increased resistance to transpiration (penetration) of moisture - only 2 cm of penoplex corresponds to roofing felt in terms of vapor permeability;
Due to extrusion, the mass is homogeneous, so evenly distributed cells significantly increase its strength. Even under very high loads, its parameters are almost unchanged;
high moisture resistance - liquid is absorbed only in places of cuts where the integrity of the cells is compromised;
penoplex is not subject to rotting and decomposition, mold does not develop in it, which indicates the high biostability of this material.

Temperature conditions that allow the use of penoplex range from -50 to +75 degrees Celsius, but for each type of penoplex the temperature limits are indicated in the instructions.

You need to know: in order for the dimensions of the penoplex slabs to remain unchanged, the temperature specified in the product data sheet must be observed. If it is overheated, its characteristics may change.

Anthill structure

An anthill in appearance resembles an ordinary mountain of branches, blades of grass, pieces of earth, but in fact it is a subtly and well-thought-out dwelling, the inside of which is much more interesting than the outside.

The ant house has a cone shape for a reason; thanks to it, the rain rolls down the blades of grass and needles almost without getting inside. The anthill rises above the level of the grass so that the sun's rays penetrate inside, which warm the ants and also warm their larvae and pupae. And the deeper layers of the anthill provide a refuge for insects on cold days. Thanks to a clever design, the ants spend the summer in the summer cone and winter in the earthen passages.

Parts of an ant's home

Looking at the picture, you can see the different parts of the anthill; below is what each of them serves:

The top covering, consisting of needles, blades of grass and twigs, protects the ant house from weather conditions.
A chamber heated by the sun's rays - here the ants warm themselves and their offspring.
One of the many entrances, guarded by soldiers, in addition to serving as a door, also serves as a channel for ventilation.
Storage area for garbage and dead ants.
A wintering chamber where ants wait out the cold in a half-asleep state.
Chamber for storing grains.
The queen's chamber is where the queen lives and lays eggs, and is tended by worker ants.
Chamber for eggs and larvae.
Chamber for aphids.
Storage room for caterpillars and other “meat” prey.

Features of insulation

In addition to the previous properties, we can name other qualities that receive special attention:

environmental friendliness;
ease of installation of penoplex slabs: they are easy to cut, and installation can be done in any weather;
The service life of this material, taking into account atmospheric influences, is 50 years. The studies carried out under severe freezing and thawing conditions provide such a guarantee even with a margin.

When independently insulating a loggia from the inside, the finishing material can be applied using “wet” and “dry” methods

Golden ten advantages of penoplex: find out all about them!

Using this material, you can completely insulate a house - from the foundation to the roof. In many ways, the choice of extruded polystyrene foam is justified by its advantages.

Favorable price.
When insulating with penoplex, you will not have to spend money on arranging a hydro- and windproof layer, as is the case with basalt-based mineral wool, and taking into account the affordable price of the material itself, thermal insulation will be more profitable.
Chemical inertness.
Alcohol-based paints, cement mortar, chlorine, chemically active building materials and masonry compounds do not affect the functionality of the insulation and its original characteristics.
Improved durability. This is reliable thermal insulation that can withstand heavy loads without destruction - it is used to insulate existing roofs for creating a parking lot or arranging a recreation area.
Durability.
According to tests carried out on a sample of extruded polystyrene foam, its service life is not only 50 years, but can significantly exceed this number - even under conditions of alternating freezing and thawing.
Low thermal conductivity coefficient.
Penoplex is able to provide a more effective insulation result compared to basalt wool and fiberglass analogues - its thermal conductivity is minimal.
Easy to process and install.
The slabs are easily cut using ordinary construction tools - there is no need to purchase additional expensive accessories.
Moisture resistance.
Such material is vulnerable to moisture only in the cut areas where the damaged cells are located. In general, extrusion is considered moisture-resistant thermal insulation, during installation of which there is no need to install waterproofing.
Environmental friendliness.
Previously, extruded polystyrene foam contained a dangerous gas - freon, but leading manufacturers have long abandoned the production of boards containing it. The harmful component was replaced with safe carbon dioxide, due to which the material ceased to pose a threat to humans and nature.
Biostability.
Resistance to decomposition and rotting processes is one of the main features of polymer boards. Fungus or mold will not appear on them, so there is no need to worry about premature disruption of the functionality of the thermal insulation system.
Wear resistance.
Throughout its impressive service life, penoplex retains its original characteristics and advantages, including the parameters of the slab itself.

Chemical activity

Of particular note is its low chemical activity. This is another positive side of the material, since it is not influenced by many compounds:

alcohol-based paints;
different types of acids;
salt solutions;
chlorine;
various oils and paraffins;
cement mortars.

But there are also substances, although there are not many of them, that, when interacting with penoplex, can cause it to change shape and even dissolve.

When insulating the adhesive for work, it is important to choose the one indicated in the instructions

This is important: when choosing a solvent for painting, you should carefully study the instructions in order to avoid deformation and shrinkage of the material.

Reasons for appearance

So, we have decided on the types of domestic ants, now let's find out the reasons for their appearance.

It should be said right away about thief ants. These insects enter human homes for one simple reason - the absence of nearby anthills of other species, where they usually get their food in the wild.

As for the pharaohs, there will be several reasons:

the anthill is located in the next room;
you rarely do deep cleaning in your apartment;
the owners themselves brought the pests into their home;
ants flee and seek refuge in your apartment.

Infestation of the neighboring premises

If your neighbors have a nest of ants, then expect that they will soon come to you. As the population grows, insects will begin to look for a place to create daughter anthills, and if your apartment is located in close proximity to the original source, then it risks being at the top of the list for arranging a new home.

In addition, the neighboring apartment will not necessarily be a breeding ground for ants. These insects love damp places and can come from a damp basement, of course, if your house has one. Having a garbage disposal can also cause ants to appear in your apartment.

And it is possible that on the ground floor of your house there is a restaurant, cafe or other catering establishment. After all, ants, like cockroaches, are located where not only a source of water is located, but also an abundance of food.

Poor sanitary conditions

Often ants come to those houses where there is a constant and inexhaustible source of food. And if you rarely carry out general cleaning, and have never disinfected places where food waste usually accumulates, then your apartment is a paradise for ants.

First, a scout will come to visit you, who will definitely see that you have something to profit from and rest assured - after a while he will return not alone. And after a week or two, a nest will be organized.

But preventing such developments is quite simple:

Regularly clean where trash cans are located;
check the serviceability of the plumbing fixtures and always close the taps tightly at night, and it is advisable to wipe the sink dry;
if you suspect that ants have taken a fancy to your apartment, look for their nest near sinks, leaking pipes, under baseboards, in cracks in kitchen walls;
do not leave open food on the table;
If you managed to trace along which “paths” the scout ants move, then these paths must be treated with a special insecticide or a reliable folk remedy, in other words, you should erase the trail that helps the parasites find their way to food.

You brought the ants yourself

This situation happens quite often, but not always this oversight on your part can bring unpleasant consequences. The fact is that ants are very organized and are always attached to their nest. Even if one of them ends up on your clothes and then in your house, it will immediately look for its way “home,” since ants are pests that purposefully look for new nesting places and they do not need help with this.

And it’s a completely different matter if you are “lucky enough” to bring a queen ant into your home. She will certainly organize a new nest and, as a result, the ant population will soon become quite numerous: some individuals will follow the queen, the rest will hatch from eggs.

Sometimes, the owners of cozy apartments manage to bring a whole nest. This happens when moving, when an anthill “moves” to a new place of residence along with furniture, food and household appliances.

Ants are looking for shelter in you

And the last reason is the persecution of insects in neighboring rooms. In this case, the parasites’ self-preservation instinct simply kicks in, and they try to escape from danger as quickly as possible.

In this case, we can advise you to pay attention to preventive measures that will prevent ants from organizing a nest:

seal the pipe joints and the places where they enter the wall;
regularly carry out wet cleaning in all rooms without exception;
it is advisable to spread repellent plants or use other repellents;
Always remove leftover food from the table;
After eating, wash the dishes immediately;
Take out the trash every day, especially if there is food waste in the bin.

And periodic communication with neighbors will be useful. In case of complaints from them about the appearance of ants, you can be “fully armed” when insects come to set up their nest in your place.

Characteristics of brands

Types of penoplex are represented by several brands; they include a set of characteristics inherent in the construction site where it will be used. Then you can achieve maximum capabilities from the material in each individual case.

Classified according to size and density:

density, available parameters - 31-45 kg/m3;
slab length -120 cm;
thickness ranges from 5 mm to 3 cm;
The width of the slab is usually 60 cm.

The insulation is thicker, it is preferable to lay it in at least 2 layers, in a checkerboard pattern, then the strength and uniformity of the coating will be higher

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The ability of various types of thermal insulation to resist ants

In North America and Europe, various species of ants plague homeowners, causing enormous economic damage. This problem is relevant for residents of some regions of Russia and the countries of central Central Asia.

For example, carpenter ants have strong jaws and build nests in partially destroyed logs or stumps, as well as on growing trees and heavily dried wood. In conditions where ants enter constructed buildings, the need to build nests leads to clashes between ants and people.

If there are ants in homes, people experience discomfort; in addition, ants can destroy load-bearing wooden structures from the inside or reduce the thickness of the thermal insulation layer.

Therefore, research was carried out at the Norwegian Institute of Public Health to examine the ability of different types of insulation to resist ant attack.

In three experiments, Norwegian scientists used 2,250 carpenter ants and 120 larvae. The experiments compared materials such as:

expanded polystyrene (EPS);
extruded polystyrene foam (XPS);
foam glass FOAMGLAS.

During the experiment the following were determined:

time from the settlement of ants in containers with insulation samples to the beginning of destructive activity;
the degree of destruction of samples of thermal insulation materials 5 days after the start of ant activity;
the influence of the temperature of samples of thermal insulation materials on the activity of ants.

Experiments have shown that expanded polystyrene foam (EPS) and extruded polystyrene foam (XPS) cannot resist ant penetration. It turned out that in the above-mentioned thermal insulation materials, ants are able to dig passages and corridors, as well as make full-fledged nests. The experiment revealed that ants caused more damage to slightly heated EPS and XPS samples.

Unlike EPS and XPS, FOAMGLAS foam glass samples withstood exposure to ants and did not suffer damage regardless of temperature

How to protect penoplex from rodents?

It is necessary to take care of protecting the heat insulator from the invasion of rodents and insects at the construction stage.

If possible, it is necessary to lay a strip foundation of concrete blocks, and fill the perimeter with broken glass.
For insulation, it is better to take thick polystyrene, which mice are reluctant to gnaw.
When installing insulation boards, carefully seal joints and cracks.
Foam boards should be covered with a fine metal mesh or the lower part of the house should be upholstered with thin iron to a height of 50–60 cm. External finishing with siding or other similar materials will also save you from mice.

However, most often mice appear in an old house, the builders of which had no idea about such a scourge and did not provide protection from rodents and insects. In this case, to prevent damage to the insulation, the following measures must be taken.

Find and seal cracks and holes in the facade, through which gray pests could theoretically enter the house from the street. At the same time, do not forget that a mouse can fit into a hole with a diameter of 0.5 cm.
Place protective nets on the ventilation windows in the foundation.
The bottom layer of penoplex is covered with a metal mesh with small cells. The most suitable cell size is 10x5 mm, wire thickness is at least 0.5 mm. It is better to use more flexible aluminum mesh, but steel mesh will also work.
Put everything in order in the kitchen and utility room: put all products in containers inaccessible to mice - pour cereals and flour into glass jars with lids, place vegetables in closed enamel pans, store products and cooked food only in the refrigerator. The trash can must have a lid. If the mice have nothing to eat, they will quickly move to a more suitable place.
To drive pests out of your home, you can use an electronic repeller. This device emits ultrasound, which affects the psyche of animals. Having heard the signals sent by the repeller, mice tend to quickly leave the room and get away from the irritant. However, you must be prepared for the fact that after turning off the device, uninvited guests will appear again.
Boric acid can be sprinkled in areas where pests emerge and around the perimeter of the home. But it is important to ensure that pets or children do not suffer from the poison - this method is applicable only if no one lives in the house temporarily. Moreover, we should not forget that the corpse of a poisoned mouse can remain inside the foam and spread an unpleasant odor throughout the room for a long time.

The surest and safest way is to get a cat.
You can repel pests with the smell of dried chamomile, wormwood, black root, wild rosemary, elderberry and other plants.

If you cannot cope with rodents on your own, there is only one way out - to invite specialists to carry out complete deratization.

Protecting foam from pests

Polystyrene foam is a very convenient material for thermal insulation and sound insulation. But it is various foam plastics that are most susceptible to attack by mice and rats. These are materials such as extruded polystyrene foam, polyurethane foam, penoizol, penoplex. These materials are artificial, so they are not suitable for mice as food, but they chew them and turn them into dust. In the resulting voids, rodents make nests for themselves. To protect it from rodents, you need to take certain measures:

It is necessary to choose dense types of polystyrene foam for insulation, since it is inconvenient for mice to gnaw on dense material.
Proper installation of the foam is necessary. It must be carefully puttied and sheathed using special materials, selected individually. The goal of proper installation is to prevent the appearance of cracks, since rodents enter the home through the cracks.
All holes must be sealed with foam.
It is advisable to provide metal sheathing along all walls at pest entry level. They won't be able to handle metal.

These measures must be taken into account at the construction stage. If they have not been accepted, all that remains is to take actions aimed at repelling rodents:

The easiest way is to get a cat. Just the smell of a cat in the house repels mice.
You can install an electronic repeller, but if the area of the house is large, one device will not be enough, you will have to install several. Such repellers emit ultrasound of various frequencies, which causes fear in rodents and forces them to leave the building.
All food supplies must be kept out of the reach of rodents.
The home must be kept clean.

Folk remedies are effective to protect polystyrene foam. They are based on the use of various plants that repel rodents with their smell. These are plants such as pine needles, tobacco, mint, wormwood. These dried plants can simply be scattered in corners. During the construction phase of a house, you can treat the foam with lime or red pepper.

Some people use boric acid to repel pests, but its effectiveness in controlling rodents has not been proven.

If none of the above methods help, you need to contact the sanitary and epidemiological station, whose employees will come and carry out a complete disinfection of the premises and the elimination of all rodents.

How to treat penoplex?

To protect the insulation from ants and rodents, you can treat the surface of the penoplex with copper or iron sulfate or borax solution. It’s just a pity that such labor-intensive work will not bring 100% results. Under the influence of the sun and water, the impregnation will quickly wash off, and along with it, the seemingly reliable protection of the insulation will disappear.

Some experts advise painting or covering foam boards with glue. It will be more difficult for mice to move along slippery walls, and it will be more difficult to chew through a layer of paint than unprotected material. In addition, the smell of paint and glue will repel pests.

If none of the above methods helps, you need to take drastic measures - remove the destroyed thermal insulation material and re-insulate the house using materials that are resistant to the sharp teeth of rodents: foam glass, foam concrete, ecowool.

And even though mice do not eat penoplex, they cause enormous damage to the home by making numerous tunnels, destroying insulation and deteriorating thermal insulation. Reinforcement with mesh, treatment with insecticides and storing products in a place inaccessible to pests will help protect polystyrene foam from rodents.

Conclusion

Unexpected guests can disturb the peace of the legitimate inhabitants of the house. Constantly feeling someone else's presence is unpleasant for everyone. Even if this alien is not visible behind the wall. Mice leave an unpleasant odor, noise, and infection. It is imperative to fight them. They chew through insulation panels and leave behind debris. The necessary measures are taken to protect the foam. Mice love to sharpen their teeth on it, build trenches and labyrinths. It is better to think about this right away, before building a house.

To keep pests away from your home, keep it clean and do a thorough cleaning every week. Basements and attics must also be properly maintained. It is better to take trash and unnecessary things out of the house so that mice do not make houses for themselves. If you prevent the appearance of unwanted guests, then you won’t have to worry about it.

We consider thermal insulation materials

To find out the “preferences” of rodents regarding various insulation materials, you need to know a simple rule: in search of a place for a nest, the mouse will follow the path of least resistance and begin to gnaw on softer material. First of all, let's make a list of insulators used to increase the energy efficiency of residential buildings:

solid natural materials – expanded clay, vermiculite, foam glass;
blocks made of foam and aerated concrete, wood concrete;
artificial polymers - foam plastic, foamed polyethylene and polyurethane, extruded polystyrene foam (aka Penoplex);
building materials based on glass and basalt fibers - mineral and glass wool;
new cellulose insulation – ecowool.

This is what ecowool thermal insulation looks like

Note. For obvious reasons, the list does not include rarely used perlite concrete products and any fiberboards.

The ability to resist pest attack is affected by 3 characteristics of a thermal insulation product: density, chemical composition and flowability. Based on these characteristics, we will consider all types of insulation.

Vermiculite and expanded clay

These two building materials, and even foam glass, are the best option for protection against rodents. Their main advantage is their high density and flowability, which does not allow them to make a hole. The main condition is that the insulating layer must be well compacted so that the gaps between the pebbles are minimal. Solid blocks of foam glass cannot be chewed through due to their hardness.

Covering with foam glass panels

The characteristics of insulation look like this:

The density of expanded clay gravel ranges from 200 to 800 kg/m³ depending on the size of the fraction, thermal conductivity is 0.11–0.21 W/(m•K).
Crushed vermiculite stone has a density of 250 kg/m³ with a thermal conductivity of 0.13 W/(m•K).
The foam glass indicators are respectively 160 kg/m³ and 0.06 W/(m•K).

A layer of expanded clay inside the wall leaves no chance for pests

Mice do not eat expanded clay with vermiculite and all products based on them, for example, expanded clay concrete. Another thing is that the thermal insulation properties of these materials are low, and their mass is large. To replace 100 mm of foam plastic with a thermal conductivity of 0.04 W/(m•K), you need to fill in a layer of expanded clay gravel of at least 30 cm, which increases the thickness and weight of the structures too much. Foam glass insulation is effective, but not cheap.

The following conclusion suggests itself. The listed materials provide almost 100% protection against mice, but are impractical or expensive to use. That's why they are inferior in popularity to the next category.

Lightweight concrete blocks

Theoretically, mice are able to chew through foam blocks and wood concrete, but they do this extremely rarely, since the materials are quite hard and dense:

wood concrete products – 300–800 kg/m³;
aerated concrete – from 400 to 500 kg/m³;
foam block - 600-1000 kg/m³.

In terms of thermal insulation parameters, light blocks are comparable to expanded clay - the thermal conductivity coefficient lies in the range of 0.1-0.2 W/(m•K). At the same time, they have one big advantage: block products are structural building materials. That is, it is possible to build external walls from aerated concrete that can bear significant loads. Therefore, in recent years, the popularity of wood concrete and various foam blocks has been constantly growing.

Note. The lower the thermal conductivity of the material, the better its insulating properties.

Polymer insulation

The answer to the question of whether mice chew foam plastic has long been answered: definitely yes. It so happens that products with the best heat conductivity indicators - 0.04-0.045 W/(m•K) have a low density - from 15 to 35 kg/m³. Therefore, rodents take great pleasure in settling inside polymer slabs at the slightest opportunity.

The same answer awaits homeowners who are interested in whether rodents eat polystyrene foam (otherwise known as Penoplex). Since its hardness and density, equal to 30-50 kg/m³, is greater than that of foam plastic, mice are not so willing to make holes in it. But the thermal characteristics of the material are even more attractive - 0.037 W/(m•K), and gray pests feel it. Especially for skeptics, we will show a photo of a polystyrene sheet with a mouse hole.

The animal has just begun to gnaw a hole in one of several sheets folded in a stack

Rodents have a similar attitude towards polyurethane foam and polyethylene foam - if necessary, they make nests in these insulation materials. Hence the conclusion that applies to all polymers: it is unacceptable to refuse lightweight and energy-efficient materials because of mice, but you will have to think carefully about how to protect them from damage.

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Mineral wool

Basalt and fiberglass products cause the most controversy - some users claim that rodents “love” mineral wool, the other half proves the opposite. It is impossible to refuse to use these materials for 2 reasons: they do not burn at all (except for glass wool) and allow water vapor to pass through, and therefore are good friends with wooden structures.

In low-density rolled mineral wool, mice move freely

Let us present our reasoning in the form of theses:

The density of mineral wool insulation varies over a wide range - from 40 to 200 kg/m³. Practice shows that mice hardly touch basalt slabs, whose specific gravity is more than 80 kg/m³.
Unlike previous building materials, the chemical composition of fiber products includes synthetic binders - carcinogenic resins based on formaldehyde. This makes the product not as “appetizing” as expanded polystyrene.
Roofing glass wool and mineral wool in rolls are vulnerable to rodents due to their soft structure. They make nests in the material, despite the presence of formaldehyde resins and tiny glass particles.
Ecowool, made from cellulose fibers, is susceptible to mouse attacks to the same extent, since it cannot boast of high density.

Reference. Manufacturers of ecowool claim that they add boric acid to its composition, which prevents the colonization of all kinds of living creatures.

Conclusion. Maximum protection against the penetration of mice will be provided by slab basalt insulation with a specific gravity of 100-145 kg/m³, and it is recommended to use it whenever possible. There are currently very few cases where such dense mineral wool was damaged by pests.

Study

The answer to the question about thermal insulators that repel rodents is impossible without market research. In total, it contains two types of heat insulators - organic and artificial.

Organic insulators are made from recycled or natural materials. They contain a minimum of chemical additives - only substances that resist fire. The main examples are ecowool, reed, straw, etc.

There are many more inorganic or artificial heat insulators. And if natural ones are produced, as a rule, in bulk or in slabs, then this category has more formats: slab mineral or basalt wool and loose perlite. You can opt for solid aerated concrete. Next we will talk about reliability indicators in relation to rodents.

How to protect an insulated house from rodents

It makes no sense to talk about how to get rid of mice using rat poisons and all sorts of mousetraps, especially when they live in the thickness of the outer walls. The best way to preserve the integrity of the thermal insulation structure is to keep the mouse out of the house, although a 100% guarantee cannot be achieved. What is recommended to do:

Try to build houses from warm structural materials - aerated concrete or wood concrete. If you maintain the required wall thickness, you will not have to insulate them.
To insulate roof slopes and ceilings, use dense basalt wool or fill the attic with expanded clay.
To protect polymer and other soft insulation materials, the foundation and base of the house must be enclosed in a fine steel mesh coated with zinc.
Make a basement ebb in the form of a metal canopy around the perimeter of the building. It will prevent the mouse from climbing up the wall to the roof.
Install an ultrasonic repeller in the attic.

Such an overhanging canopy is quite difficult for animals to overcome

Also, do not refuse the help of your smaller brothers - domestic cats. For a successful hunt, they need to provide access to closed cavities, the attic and basement, not forgetting to remove all mousetraps. More information about protective equipment is described in the video:

Pests in the barn

Rodents try to penetrate not only the house, but also any buildings in search of food. Therefore, residents of private homes are interested in how to get rid of rats in the barn on their own. In such a room they either keep large quantities of food for livestock, or for themselves. Therefore, there is always something for rodents to profit from.

Important! Their presence affects the health of birds, and as a result, productivity. Therefore, you need to get rid of impudent pests immediately

Chemicals

The easiest and cheapest way: just buy a pesticide and pour it into the place where it penetrates. However, everything is not so simple: pets can also be poisoned. It is unlikely that it will be possible to transfer animals from the treated area for 2-3 days, so this approach is risky. However, you can prepare traps: for example, put the poison in boxes where chickens, for example, will not climb.

There are several types of chemical poisons:

Use force

Rats are larger and much more dangerous than mice, so it is advisable to know how to get rats out of the barn using folk remedies before they cause trouble - these rodents take great pleasure in strangling chicks. Placing traps near their holes and installing special traps is a sure and effective way to catch pests. You can have several cats that are capable of hunting and killing rats: this ability does not depend on size at all. Fluffy mousetraps can be very miniature - it's all about speed and resourcefulness.

Traditional methods

To get rid of rodents, you need to make their stay in the barn unpleasant. This is even more effective than direct destruction - rodents multiply quickly and do not stop in front of traps.

Stove ash scattered on the floor guarantees mice digestive problems;
If no one lives in the barn, you can use mothballs or kerosene - this is a sure way to get rid of rats and mice in the barn.
Holes in the walls need to be filled with broken glass and then filled with concrete. No polyurethane foam!
Cruel method: a mixture of clay and flour will attract rodents, so water is placed nearby. The liquid causes the plaster to harden and the mouse dies.
You can hang and arrange bunches of herbs - black root, the second name of which is rat-eater, is not felt by humans, but is destructive for rodents.
Tansy, wild rosemary and peppermint - any of these plants will help get rid of rats and mice in your area.

Rodents destroy crops and livestock year after year and cause harm to humans

Being careful and taking timely measures will help protect yourself and your home from rats and mice.

Do mice live in polystyrene foam or polystyrene foam?

According to some studies, polystyrene foam and its derivatives do not have any harmful effects on the health or well-being of mice. Rodents successfully build nests in polystyrene foam and polystyrene foam.

Due to the presence of such materials, the pest population can increase significantly.

But at the same time, there is an alternative opinion that they gnaw through these materials only to pass through barriers, but the animals avoid living in them.

What to do if the foam is already damaged

Pests often damage wall cladding. The owners notice this when they need to change it. What do enterprising people do in this case? – Replace damaged polystyrene foam boards with new ones. To prevent pests from entering the premises again, the necessary measures are taken.

When installing the base profile, there is no need to dismantle the slabs. Through a layer of reinforcing mesh, a rat cannot grab onto polystyrene or penoplex with its teeth. This material is extruded polystyrene. But this does not stop gray mammals. They can also damage the untreated extruded composition, like regular polystyrene. Only the metal mesh must have small holes, otherwise the animal will crawl through them. Effectively used to cover polystyrene foam, aluminum mesh.

Insulation that mice don't chew

To prevent mice from making moves in the walls, it is useful to use the following materials:

Foam concrete. It is a rigid, but light and porous insulating material. It is not suitable for pests gnawing holes. At the same time, buildings built using such material are warm, durable, and also environmentally friendly.
Expanded clay. This insulation has proven itself well and has been popular for many years. Its basis is a special type of clay. It consists of granules, the size of which varies from 1 to 40 mm. Expanded clay is used to insulate walls and floors. This material is not suitable for mice or other rodents. It is difficult to move around, you feel a lack of air, and small particles clog the organs of the respiratory system.
Ecowool. This is a lightweight fibrous building insulation material based on orthoboric acid. It can cause lung damage and dehydration, which leads to the death of mice. This material is not dangerous for humans and pets. It is suitable for insulating both external surfaces and walls inside a living space.
Foam glass. This material is a foamed carbon mixture of waste glass. During production, glass cells are formed that fit tightly together. This fiberglass has good thermal insulation properties and is not afraid of moisture. In addition, it is convenient to use and is also rodent resistant. When a mouse tries to bite through such insulation, it immediately injures its oral cavity, so it quickly abandons this idea.

If a rodent population begins to develop in the thermal insulation layer, then urgent measures must be taken.

Mice will have no incentive to live in a particular insulation if there is no available food source.

At the same time, heat insulators must be reliable and resistant to pests. The same cannot be said about polystyrene foam, penoplex or extruded polystyrene foam.

Resistant seals

In fact, rodents practically do not eat insulation materials; they only make passages in them. During construction, home owners insulate the floors and walls. If rats or mice decide to settle in such a space, it will be extremely difficult to evict the pests, so it is best to find out in advance which insulation does not allow rodents to live in.

Smooth expanded clay

Expanded clay is a material made from clay by firing at high temperatures. It has a porous structure, lightness and smoothness. This insulation has excellent thermal insulation properties and an affordable price. There are several pest-resistant varieties of expanded clay that are used for home insulation:

Gravel. The most common type of expanded clay. Pellets can be either oval or round in shape.
Crushed stone. This material consists of parts of pellets and has sharp edges. It can very often be found in concrete.
Dropout A good fine material obtained from waste as a result of crushing or roasting.

Rodents do not chew some types of expanded clay
. Expanded clay is a good environmentally friendly material with low toxicity. Rodents avoid it for several reasons:

The coolant is round and mechanically dense, which is unpleasant for the teeth of pests.
The compactor will shrink, making it very difficult to dig passages and make holes in it.
There is too little empty space in such material (especially in screenings and crushed stone), so rodents will not have enough air.

Durable foam glass

Foam glass began to be produced back in the USSR. At first it was used in floating structures, but then it became known that it has excellent thermal insulation properties. This material is created from glass waste and is produced in the form of slabs and bulk material. The slabs hold plaster and glue well, they can be sawed and laid on cement mortar.

This material has a lot of advantages

The seal is quite expensive, but has many advantages. The following advantages can be highlighted:

pest resistance;
amazing durability (can be used for up to 100 years);
does not shrink or shrink;
high strength, rats and mice cannot figure it out;
lack of microflora necessary for the development of fungi and insects.

In this video you will learn how to choose insulation:

Safe ecowool

Cellulose insulation is also not suitable for rodents. This material is made from paper waste and impregnated with fire retardants and antiseptics. Unlike ordinary glass wool, ecowool does not lose its qualities when in contact with water. The main advantages of ecowool:

fire resistance;
seamless installation method;
excellent thermal insulation;
high-quality sound insulation;
environmental friendliness and safety.

Although ecowool is one of the most environmentally friendly materials, rats and mice are in no hurry to settle in it. During the production of this sealant, it is treated with orthoboric acid. This substance causes rodents to lack air and become extremely thirsty, so they immediately leave the area.

This insulation is very easy to install

Fire-resistant foam concrete

Foam concrete is highly reliable and has a long service life. This is a very durable material that is not subject to combustion. It is able to accumulate heat and normalize the level of moisture in the room. In addition, foam concrete has the following advantages:

ease of installation and processing;
good sound insulation;
environmental friendliness;
possibility of laying blocks on glue;
fire safety.

Stone strength makes the seal one of the most resistant to rodents. However, during operation, microcracks appear in it, in which insects can settle. Also, this material does not like moisture very much: contact with water can lead to the formation of mold, a vapor barrier is necessary. In addition, foam concrete is quite difficult to plaster.

Reliable penoizol

Penoizol is a high-quality and durable sealant. It is designed for at least 50 years of operation without loss of basic properties. The material also has other advantages:

resistance to temperature changes;
ease of installation;
good thermal insulation;
fire resistance;
environmental cleanliness;
resistance to fungus and mold.

When not yet hardened, the sealant has good fluidity, so it can easily fill various openings and cracks in the building. Rodents are not attracted to penoizol because it contains formaldehyde, which is used as an antimicrobial agent, and fine dust, which causes suffocation in rats and mice.

Penoplex and safety

Manufacturers and sellers constantly talk about the safety of the material, but is this true? Is penoplex harmful to health?

Many argue about the environmental friendliness of this material, explaining that even when treated with a fire retardant, it is susceptible to combustion. One cannot argue with this, since many of the objects around us cannot withstand fire.

The flammability class of penoplex is usually G4 or G3

Whether it can ignite on its own or contribute to a fire is another matter. The question here is clear - no. But when ignited, it produces a lot of acrid smoke and releases toxic substances. However, it ignites slowly, so before it catches fire, a lot of time will pass, and the fire can be put out in time.

Another disadvantage that has a negative impact on the human body is the destruction of the material that occurs under unfavorable operating conditions. Penoplex not only loses its properties, it oxidizes and begins to release toxins into the air. This happens when low-quality products are selected, or installation rules are violated.

Therefore, it is important to choose only material manufactured in accordance with the technology, adhere to the rules when installing, and do not use incompatible compounds. Only under these conditions will it fulfill its purpose without harm to humans.

What is the attractiveness of the material

But really, why do mice chew foam? There are at least five reasons for this.

Everything is elementary. A plastic material with excellent thermal insulation properties is ideal not only for insulating a human home, but also for arranging rodent nests, where they settle without a twinge of conscience. Other building materials have similar properties: penoplex, expanded polystyrene, which mice gnaw for the same purpose.
Even if the gray animals do not intend to live in foam plastic, they will still use it to create their own labyrinth. Well-trodden paths are corridors along which you can walk without fear between the nest and the kitchen or pantry, where many tasty and edible human supplies are stored.
The constant growth of the incisors causes the animals to gnaw on surrounding objects.
House mice can damage material in stressful situations: for example, during strong noise, as a result of a sharp increase in the number of individuals in the population, when the struggle for food and shelter begins.
Exploratory behavior: It has long been proven that when they come into contact with something new and unknown, rodents try to try an unusual object on their teeth.

How to protect your home?

To maximize the protection of your home, always consider carefully sealing cracks and service openings. Then any rodents will not simply have the physical ability to live in mineral wool.

Do rodents live in mineral wool?

Official manufacturers are silent about such a point as resistance to any rodents; they simply try to omit it. Although if you look at numerous messages on construction forums, craftsmen complain and talk about such an unpleasant moment.

So what needs to be done to create a reliable barrier, what do mice dislike the most? In first place, oddly enough, is clay, which is processed according to a certain scheme and formed into granules. They really don’t like such a place for their home, especially if you use a small fraction. The reason is quite simple and banal. When rodents begin to move on unsteady surfaces. They simply fail. Among other things, being in dusty expanded clay for a long period of time, they have nothing to breathe due to the fact that the airways are clogged. Next, let's turn our attention to foam glass. Its manufacturing technology is as follows:

Steam the glass.
Next comes glass foaming.

When foam glass hardens, it hardens as much as possible and is not susceptible to rodent teeth. Foam concrete is also widely used. It is also considered an excellent barrier.

Foam glass

Solid insulation is of course the best way to keep rodents out. But at the same time, the level of its thermal indicators is an order of magnitude lower. Therefore, use and select a material not based on its rodent resistance.

We recommend reading: White residue from an air humidifier: how to fight it, why it appears

As an afterword

What can you advise the owners of dachas and country houses if they have a problem - mice chew on foam plastic (expanded polystyrene). First of all, don't panic. A mink discovered in time should serve as a signal for immediate action. Check your home regularly for rodents and be vigilant. This way you can avoid serious problems and equally serious costs.

Secondly, if you have the opportunity, when building a house and insulating it, do not forget to cover a layer of polystyrene foam with a protective fine-mesh mesh. This way you will protect the polystyrene foam not only from rodents, but also from birds, which can also cause damage.

Thirdly, take the advice of experienced homeowners and install an ultrasonic mouse and rat repeller. Believe that the costs will not be in vain and will more than pay for themselves. The device is not that expensive, it is quite effective and does not require special maintenance.

Don't forget about the cat. There may even be several of them if you have a large farm. Our grandparents always kept a cat in the house and were pleased with the result. Cleanliness is not only a guarantee of health, but also a guarantee of your quiet life in your summer cottage. Mice eat what you throw at them, they eat with appetite, they eat a lot - don’t forget about it!

In addition to the fact that they eat insulating material, they can infect you with some kind of infection (hemorrhagic fever, for example). Therefore, after exterminating mice, be sure to carry out thorough disinfection. It is better not to do this yourself, as there is a risk of poisoning from chemicals. There are specialized companies involved in pest control. They will efficiently destroy rodents and disinfect the area.

What do rodents not like?

But really, what kind of insulation is not chewed by mice?

In first place, perhaps, we can put expanded clay - clay, processed in a special way, formed into granules of different sizes. Rodents do not like it as a place to build a home, especially if a small fraction is used. The fact is that when moving on an unsteady surface, mice fall into it, and besides, a long stay in dusty expanded clay clogs the animals’ airways and they become unable to breathe.

In second place is foam glass - it is made by steaming and foaming glass. When hardened, such material becomes too hard and does not lend itself to mouse teeth.

Foam concrete is another material that is an excellent barrier for the gray army of rodents. The solid mixture of sand, cement, water and foaming agent has a hard and porous structure, which makes it difficult for mice to gnaw passages.

Damage to insulation by rodents

Mice and foam

Rodents need such material only to build themselves a home in it for comfortable conditions when breeding offspring, so that the mouse is born in a warm place. Mice also chew penoplex to sharpen their teeth.

As a result of many studies, several factors have been identified:

every year, rodents begin to enter homes when the cold weather sets in

It is more convenient for them to settle in a place where there is always food and warmth; it doesn’t matter to mice what kind of building material was used, they will still find ways to enter; Mice have the ability to climb vertically. Thanks to this, they can penetrate the roof, which is where the most heat accumulates;

In addition, mice are designed in such a way that their front incisors grow throughout their lives. Therefore, they simply need to chew something to wear them down. And foam plastic is perfect for this. According to zoologists, if mice are stressed, they begin to chew on material much faster. Such stress can be triggered, for example, by construction work.

What insulation materials are not a barrier to mice and rats?

We've become familiar with sustainable materials, but what insulation materials should we not use in our home? There are many of these, mice feel very comfortable in them. Rodents easily gnaw holes and set up nests, although they rarely eat insulation. The worst material for insulating a house is polystyrene foam. Thorough treatment of the insulation with boric acid or copper sulfate will help against pests.

Types of mineral wool: glass, stone (basalt)

Mineral wool has high heat-insulating properties; it is obtained by processing slag and some rocks with additional impurities. One of the varieties of mineral wool is glass wool, which was widely used as insulation in Soviet times. It is elastic, durable, breathable, frost-resistant, and fireproof. Fungus and mold will never appear in it, but mice often appear. Rodents do not eat glass wool, because it is very prickly, but they easily make long passages in it and build nests.

Today, glass wool has been replaced by stronger and safer basalt (stone) wool. It is made from the remains of rocks by rapid melting. Its soft fibrous structure, thermal conductivity and environmental friendliness make it a favorite habitat for rodents. They settle inside the material, which leads to a decrease in the quality of thermal insulation of the house. No mineral wool is suitable for insulating residential premises.

Polystyrene foam and polystyrene foam

Foam plastic attracts rodents with its texture and smell; in a short time they can turn up to 80% of the insulation into dust. Mice not only settle in it, but also store food reserves inside, which makes a person’s stay in the room unbearable. Polystyrene foam is very easy to install and is inexpensive, but before use it must be properly prepared. Foam boards can be covered with fine-mesh metal mesh, but this is too expensive. Experienced builders advise dousing them with liquid concrete solution, which prevents the appearance of rodents.

Instead of polystyrene foam, you can use polystyrene foam, which is more resistant to mouse teeth. It is made from the same raw materials as polystyrene foam, but using more modern technologies. Special fire-retardant substances are added to it at high temperatures, enriched with carbon dioxide and extruded. The resulting mass hardens and is cut into slabs of the required size. Expanded polystyrene has a higher density, lightness and ease of installation. It has excellent thermal insulation, resistance to moisture and frost, but the thicker the slab, the more readily rodents breed in it.

Polyurethane foam

Unfortunately, the answer to the question of whether mice chew polyurethane foam can be answered in the affirmative. They not only grind down their growing teeth on it, but also grind the foam into fine dust, which they use to build nests. Inexperienced owners of private houses are trying to seal holes made by mice and rats with polyurethane foam. This empty exercise will lead to nothing, because it will not be an obstacle for rodents.

Foam rubber, roofing felt and other materials

Unlike foam rubber and polyurethane foam, mice cannot chew through roofing felt and slate, because they are dense and hard. The only disadvantage of using roofing felt is its ability to absorb odors. The shortcoming can be eliminated using a film stretched over a roofing felt sheet. Instead, roofing felt is often used, the smell of which is unpleasant to rodents. It is better not to use foam rubber as insulation at all, just like chipboard, because these materials are defenseless against the teeth of rats and mice.

The choice of insulating material begins at the stage of laying the foundation. First of all, pay attention to its thermal conductivity properties, durability, and noise protection. An important point is environmental friendliness, fire safety and breathability. From this point of view, expanded clay is an ideal insulation material. There are cases where rats have damaged aluminum and lead pipes, and it is not difficult for them to chew through most popular insulation materials.

Review of rodent-resistant insulation materials

Now let’s figure out what kind of insulation mice and rats do not eat; it is the options listed below that make sense to purchase for insulating the structures of a private house.

Expanded clay

Bulk insulation is made from baked clay. Expanded clay is often used to insulate floors and ceilings. Expanded clay is not used to insulate the walls of a wooden or light frame house; it has an impressive weight, creating additional load on the foundation.

Advantages of insulation:

availability;
ease of installation;
resistance to rotting and burning;
service life is comparable to the life of the building.

Rodents do not show interest in this insulation, but can make passages in the bulk layer. To prevent the spread of rodents, it is recommended to mix the bulk layer with light cement mortar. This will turn the bulk insulation into block insulation.

Foam glass

Foam glass is a material that is literally too tough for rodents. It is a lightweight panel made of silicate foam material. For production, glass production waste is used mixed with foaming agents; they are sintered in molds at high temperatures.

Pros of foam glass:

resistant to corrosion, not afraid of moisture, temperature changes;
not subject to temperature deformation;
easy to process;
service life – at least 100 years.

Read on topic - How to make a rat trap with your own hands

Ecowool

Despite the fact that this material is organic (it consists of 80% cellulose), rodents avoid ecowool. It's all about the impregnation used in production. The base is treated with orthoboric acid, which effectively repels rats and mice. The concentration of this acid is low, the material is completely safe for people, but rodents try to avoid it.

Additional advantages of ecowool:

fire resistance;
environmental Safety;
excellent sound insulation;
resistance to moisture; when installing ecowool insulation, a vapor barrier is not required.

Ecowool is applied using pneumatic installations or manually. The first method is much more effective, it allows you to use material economically, fills all the cracks well, and reduces the work time by an order of magnitude. Insulation with ecowool can be done when constructing a new building or when reconstructing an old one. Service life - at least 80 years.

Cons of ecowool:

high price;
costs of using pneumatic installations during application;
the need to dry for 3 days at a certain level of humidity.

Foam concrete

Cellular foam concrete is hollow blocks of concrete solution filled with air bubbles. To perform thermal insulation, grades D400 and D500 are used. The insulating layer of foam concrete is almost never damaged by rodents, especially if foam concrete is used to insulate walls made of dense materials - brick, concrete.

Advantages of insulation:

fire resistance;
durability;
environmental Safety;
simple and quick installation.

Disadvantages of foam concrete:

does not tolerate moisture well;
In the absence of ventilation, mold may appear on foam concrete blocks.

Do mice chew through penoizol?

Penoizol is a unique material in which mice and harmful insects do not live, but are quite capable of chewing through it. Penoizol is resistant to fire, easy to install, immune to temperature changes, and does not grow fungus. In liquid form, it is used to fill cavities and voids in foundations and floors. Cured penoizol is widely used for insulating old wooden houses. Sometimes formaldehyde, which is poisonous and dangerous for rodents, is added to it, and it is better not to use it for interior decoration.

What ants can be found in residential buildings?

There are two types of domestic ants in Russia:

pharaonic or red - these insects are very small; their body length is only 2 mm. They are not adapted to living in the wild in a temperate climate and therefore, when the opportunity arises, they try to settle in a human dwelling;
thief ants - unlike the previous species, they can easily live outdoors, and hunger can force them to come into your house. They come in small groups and most often appear in dachas; You can meet them on the ground floor or in the basement. In multi-story buildings, they almost never rise above the second floor - the female finds a secluded place in the room and establishes a nest there, from which working individuals subsequently run out into the apartment from time to time.

Representatives of both species have a yellow or sometimes orange body color and are the most frequent guests of residential apartments. If you live in a private house, you may also encounter black ants. But they are not domestic; they enter the house only in search of food and, as a rule, leave on their own after a while. Unlike house ants, black ants do not set up nests in a person’s home, but only “walk” through all rooms in search of a source of saturation.

In old wooden houses located in a forest belt, you can sometimes find red ants. They are also not domestic and parasitize only on the joints of logs. In addition, their appearance is isolated cases.

How and with what did you insulate the house before to prevent mice from getting in it?

Today there are different types of modern insulation on sale that we have never heard of before. Old proven methods of thermal insulation are considered to be the use of expanded clay, slag and ordinary sawdust mixed with quicklime (fluff). Rodents will never enter a house insulated with such materials. The use of polystyrene foam, mineral wool or polystyrene foam will not protect your home from pests. Ultrasonic repellers, poisonous baits and mousetraps will help keep your home safe.

The harmful effects of ultrasound are not felt by humans, but this does not mean that it does not affect them. The safety of such devices for people has not been fully proven. Spreading poison poses a danger to pets and children, and mousetraps are ineffective. Interestingly, rodents are afraid of the smell of wormwood, so you can add leaves and stems of this plant to the insulation, but you will need a lot of them.

If they already live?

In this case, you should not hope that the rodents will go away on their own. You need to get rid of mice and other rodents in two stages. First of all, you need to eliminate the source of their appearance. Perhaps it's a trash can that may be causing mice to live near the house, or unopened edible supplies in the house. In general, everything that pests can drink.

When the source is eliminated:

Disassemble the insulating pie;
Remove damaged parts;
Restore the insulation layer;
Make sure you're protected for the future.

Although, it is clear that there cannot be any miracle solution to the problem. Therefore, many decide either at the replacement or construction stage to choose one of the options that is not interesting to pests.