Foam insulation is an excellent result in the shortest possible time. Insulating the floor with foam in a wooden house

Floors in a wooden house must be reliably insulated. This will not only provide coziness and comfort in living rooms, but will also significantly reduce heating costs. How to insulate the floor in a wooden house from below without opening the floor? Insulation of the floor surface without disassembling the floor is carried out if the heat escapes through the floors, bypassing the gaps between the floorboards.

Another option, when insulation work should be carried out from below, is the reluctance of the owners to open the finishing floor covering, do insulation and make cosmetic repairs again.

Insulating the floor from below is not such a complicated process and it can be done on your own, without the help of professional finishing teams.

An important point before insulation is to choose the right insulation material and carefully prepare for the work.

Insulation with polyurethane foam: advantages, disadvantages, procedure

[content]

Foam insulation has been used for a long time. The method is not new. The technology has been well studied and the materials have been tested. The advantages and disadvantages are known. There are more advantages, because this method of insulation is used in construction and renovation.

Insulating a house with polyurethane foam: pros and cons

Benefits Overview:

1. Such insulation is a biologically pure material. It does not emit anything harmful into the atmosphere.

2. When insulating walls, floors, and ceilings with polyurethane foam, you do not need to spend money on additional waterproofing materials.

3. Foam insulation retains its technical characteristics for many years. The service life is estimated at tens of years.

4. Polyurethane foam has high adhesion rates to various materials. Applied to wooden surfaces, it also protects them from rotting and fungal attack. Metal covered with foam insulation is resistant to corrosion processes.

5. The thermal conductivity of polyurethane foam in a frozen state is several times lower than the thermal conductivity of other insulation materials. There are no seams in the foam coating. The structure is dense and homogeneous. Therefore, heat loss is minimal.

6. Foam insulation has high noise insulation rates.

Now about the disadvantages:

1. Insulation of walls with polyurethane foam indoors should be carried out in conditions of free access of air. In some cases, it is difficult to ensure compliance with this requirement.

2. Foam insulation must be covered with some kind of facing material. And this is additional expenses.

3. Polyurethane foam is not cheap. For insulation you will have to buy more than one cylinder.

Execution of work

Each construction operation begins with the selection of materials and tools. In principle, any polyurethane foam can be used as insulation. “Any” means high-quality, professional. There is no point in fiddling with household spray cans on large areas of work.

But when choosing a material, it is important to take into account the characteristics of the building that is planned to be insulated. Eg. If you need to treat a wall, floor or ceiling at the exit of a chimney or chimney, then we buy heat-resistant polyurethane foam. This is a must.

Tools

Let us repeat once again: there is no point in insulating using cylinders. Nobody is doing this. Even spray foam guns will not work. You need a special device to spray the substance.

It's expensive. To insulate numerous houses, it is advisable for customers (for money) to purchase it. To perform one-time work, you can rent it.

A device for spraying polyurethane foam supplies the product to the sprayer under pressure. From there - to the surface. The flow rate is controlled by the user (the switch is located near the nozzle). Therefore, before use, it is recommended to test the machine and set a comfortable spray level.

Stages of work

It is recommended to insulate buildings with polyurethane foam while wearing protective suits, gloves and masks; in well-ventilated areas. The work area is still large. And the volatile substances released by foam are dangerous to the respiratory system.

1. Surface preparation.

We remove all dirt and dust. We moisten the clean surface. For good adhesion of polyurethane foam, high humidity is required. To moisturize, you can use a primer diluted with water in a 1:1 ratio.

It is also recommended to nail the slats to the surface with a certain pitch. This makes it easier to control the amount of foam applied. And the installation sealant itself will have a larger area for adhesion.

2. Applying foam.

Polyurethane foam is sprayed in portions, carefully filling all cavities and joints. The work is carried out in a bottom-up direction.

When the substance has completely hardened, the surface is considered insulated.

3. Finishing.

It is not recommended to leave hardened polyurethane foam open. It needs to be sewn up or puttied.

stroy-king.ru

Scope of application

Because of the variety of foam options, you need to know exactly where you can use it. Using penoizol you can make thermal insulation for a frame room.

It can be used to fill the spaces between:

• walls both outside and inside;
• walls and covering made of plastic;
• walls and plasterboard covering;
• flooring and new flooring.

It is the use of wet insulation that allows you to create good protection for the facade of the house. All precipitation and external factors that will act on it from the outside will not affect the quality of the material in any way and will not spoil it.

Polyurethane foam is used to fix slabs that are made of solid materials with good thermal insulation, and it also fills the seams between them. This can help when laying the foundation and installing the ceiling. Using polyurethane, it is best to seal small holes, fill cavities when installing windows or pipes; this material also helps against cracks on the walls themselves.

Good results can be achieved by insulating a frame house, its roof, attic, facade and even basement with polyurethane foam.

For the winter, it is very important to take care of all problem areas so that in severe frosts you do not feel drafts and do not risk the integrity of the house, which can crack due to large temperature changes

Foam insulation - an expensive and budget solution for one material + Video

Insulation with foam, a distant “relative” of polystyrene foam

As you know, cheapness always implies not particularly high quality; there are very few exceptions to this rule. For example, insulating a wooden house with polystyrene foam - the thermal insulation is relatively good and “penny”, but fire-resistant insulation in combination with wood gives double the danger with the slightest fire. However, even quite expensive mineral wool, as it turned out, can be harmful to health if it is made with deviation from the standards. Therefore, foam insulation polyurethane foam (or PPU for short) opens up completely different horizons for those who are looking for optimal thermal insulation. Needless to say, covering 500 square meters per day is almost the entire total area of ​​the internal surfaces of a country house.

Insulation with foam, which in a frozen state resembles polystyrene foam, is very simple, although first you need to put on a thick protective suit - it will be difficult to wipe off the insulation even with the help of weak acids. After the equipment is prepared and put on, the spraying process itself begins, since the foam is a ready-made mixture. By the way, you are unlikely to be able to carry out insulation with polyurethane foam yourself, since it is difficult to find it widely sold; most often, foam spraying services are provided on the market. But if you have this insulation in your hands, feel free to take a special air gun and direct a stream of the composition onto the prepared surface.

Polyurethane foam, once on the insulated surface, begins to harden very quickly, simultaneously gaining volume. It is at this moment that the viscosity of the insulation increases, as well as its adhesion to the surface.

By filling the gaps between the roof rafters and vertical beams specially placed on the walls, you can quickly insulate your house without any seams or joints. Considering that polyurethane foam does not allow moisture to pass through and is an excellent vapor barrier, and is also not afraid of wind and can withstand heating up to 80 degrees without any damage, when insulating walls and ceilings, you can easily do without additional insulating layers, saving a lot on this. In other words, proper insulation of the house fully justifies the cost of polyurethane thermal insulation.

Insulation with polyurethane foam - an unexpected method of application

During the construction of a building or simply when replacing old window frames with double-glazed windows, workers often use foam to fill the space around the window frames. This action is carried out due to the fact that this material is an excellent insulator, is also sealed, and provides excellent protection from drafts and street dampness. Why not go further and insulate, say, the entire wall and floor space with polyurethane foam? And at the same time capture the ceiling? Slightly different scale, the technology is the same, especially since it is, in fact, the same polyurethane foam that was described above, used for domestic needs as a sealant.

What is most attractive about polyurethane foam is the volumes that come out. Having completely emptied a seemingly small container, you will receive from 40 to 50 liters of foam mass, which, being evenly distributed on the surface, will cover a significant space even with a layer thickness of over 10 centimeters. The use of polyurethane foam for floor insulation in a wooden house is quite justified, since it has such high strength after hardening that you can walk on it even in the absence of flooring. It is enough to fill the space between the joists with foam and now you have ready-made monolithic thermal insulation that is not afraid of either moisture or mechanical damage. The same is with the attic - fill the gaps between the rafters with polyurethane foam, you can immediately cover the resulting thermal insulation layer with any decorative panels.

What you need to know about polyurethane foam in general and polyurethane foam in particular

Of course, polyurethane foam is not a universal means for plugging absolutely any gaps in your home to turn it into a fortress invulnerable to various natural factors. For example, polyurethane foam can withstand fairly high temperatures, but within certain limits, up to approximately 80 degrees, then there is a possibility of the insulation catching fire, and if it is made poorly, the release of harmful substances should be expected during combustion. Also, polyurethane produced using questionable technology (unknown manufacturer) may begin to disintegrate into its components over time, even from constant exposure to water vapor. Hence the conclusion - choose only high-quality materials from trusted manufacturers.

Polyurethane foam, also being polyurethane, is more heat-resistant and can withstand even direct contact with fire. However, it also has a couple of disadvantages that should be considered when creating thermal insulation. Firstly, polyurethane foam cannot be poured into closed spaces, since without access to air with a certain level of humidity, the composition will not transform into a foamed state, remaining, in fact, the original liquid polyurethane. And one more point should be taken into account - polyurethane foam in all its forms does not withstand prolonged exposure to direct ultraviolet rays, that is, sunbathing with polyurethane foam is contraindicated. By taking all measures to smooth out the shortcomings of the material, you can confidently expect its long service life.

ogodom.ru

Material characteristics

Foam sealant has a number of special characteristics:

• foam output volume. The indicator is measured in liters, determined by the consistency and amount of mass that came out of the cylinder;
• adhesion level. The parameter is intended to characterize the strength of adhesion of the substance to the base. For example, with concrete, brick, wood and plastic, the level of adhesion of the product is exceptionally high. At the same time, there is practically no grip in case of contact with oily surfaces, ice and silicone;
• foaming The indicator characterizes the process of boiling of foam insulation in a cylinder;
• extension. The process is a chemical reaction of a substance to its environment that follows foaming;
• secondary expansion. The process occurs after polymerization of the composition, and has a negative character, since high-quality products are not subject to repeated expansion or shrinkage.

Foam for floor insulation has an expansion characteristic.
When planning the insulation of floors with polyurethane foam, one should also take into account such indicators of the quality of the substance as the level of viscosity and density.

Insulating a wooden house with polyurethane foam - pros and cons

When choosing insulation for a house or bathhouse made of wood, many opt for polyurethane foam - a material that appeared here relatively recently, but thanks to its excellent characteristics, has gained wide popularity. However, this heat insulator cannot be called new; polyurethane foam was invented back in the 30s of the last century in Germany, and forty years later it began to be used as insulation. According to experts, this material is one of the best heat insulators. Insulating a wooden house with polyurethane foam has many significant advantages, which we will discuss in detail. However, this method of thermal insulation also has certain disadvantages, which we will also discuss below, and at the same time consider the insulation technology.

Material characteristics

Polyurethane foam refers to gas-filled porous polymers based on polyurethane. The material is produced both in the form of finished parts: slabs, panels, blocks, and liquid compositions applied by spraying or pouring.

For insulating buildings made of logs and beams, liquid insulation is more in demand, which, when applied to the surface, forms a dense foam, and then quickly polymerizes and hardens.

Composition and structure

There are two types of liquid polyurethane foam:

1. Two-component. It contains polyol and polyisocyanate. Its structure is a network of isolated closed cells. The components are mixed immediately before use. Typically, two-component polyurethane foam is used for thermal insulation of large areas. A 10 cm thick layer of insulation creates excellent heat and sound insulation protection and does not require the use of steam or waterproofing.
2. One-component, better known as “Mounting foam”. It is used for domestic purposes for insulating small areas, filling cracks and openings. The composition is in cans under pressure, upon contact with air, the material foams and hardens. The insulation has a porous open structure. For effective thermal insulation, a layer at least 20 cm thick is required, and also requires the use of additional hydro- and vapor barrier.

Depending on the density, the material is divided into:

1. Hard. Its density ranges from 30 to 86 kg/m3. It has a closed cellular structure and has very low vapor permeability. Well suited for thermal insulation of foundations and flat roofs.
2. Semi-rigid. Has a density of less than 30kg/m3. The structure of the material is open cells. Applied by spraying. Used for thermal insulation of roofs and walls inside the house. Absorbs moisture and therefore requires the use of waterproofing and vapor protection.
3. Liquid. Density less than 20kg/m3. Apply by pouring method. Typically used for thermal insulation of niches and voids, it is also used to insulate structures of complex shape.

Advantages

Polyurethane foam structure

1. Very low thermal conductivity, due to which the material has excellent thermal insulation characteristics.
2. Low density, due to which the insulation is lightweight and does not create additional load on the structure.
3. High adhesion. Adheses well to the surface, filling the smallest cracks and irregularities.
4. Compatible with any materials.
5. Elasticity. When changing dimensions, deformation, compression of a wooden structure as a result of shrinkage or temperature changes, the insulation does not collapse or crack.
6. Fire resistance. The material has a fire safety class G 1-3. It ignites only when directly exposed to fire, does not support combustion, does not smolder and does not emit toxic substances.
7. Environmental friendliness. It does not emit harmful substances and can be used for thermal insulation both outside and inside the log house. It polymerizes within a few seconds after application and becomes absolutely safe for humans.
8. Not susceptible to rotting, mold, fungus, and not afraid of rodents.
9. Forms a seamless durable coating on the surface, in which there are no cracks or cold bridges, due to which it has a high heat-saving effect.
10. Durability. Manufacturers guarantee a service life of the material of at least 30 years.

Flaws

Despite many advantages, the material also has certain disadvantages that must be taken into account when using it:

Low vapor permeability. This property is especially characteristic of rigid polyurethane foam; when using it inside the house, it is necessary to equip a good ventilation system. When insulating the external walls of a house with polyurethane foam, a ventilated façade is created.

Instability to UV radiation. Solar radiation has a bad effect on the characteristics of the material. Therefore, if insulation is carried out outside the house, immediately after installation the polyurethane foam must be covered with finishing material.

Applying insulation requires expensive professional equipment, as well as skills and experience. Therefore, it is quite difficult to make thermal insulation yourself. Although this circumstance is unlikely to be a drawback, when contacting specialists you can count on high-quality and effective insulation.

Recommendations for the selection and use of insulation

For thermal insulation inside a timber house, it is undesirable to use sprayed insulation, since the dew point shifts, which can lead to freezing of the walls. If insulation from the inside cannot be done with other materials, it is better to use semi-rigid polyurethane foam, and a layer of at least 25 mm must be made.

Rigid polyurethane foam is well suited for façade insulation, as it perfectly protects walls from adverse natural factors.

Thermal insulation of the roof is best done with soft foam or liquid polyurethane foam.

Insulation of the foundation and plinth is usually done using ready-made polyurethane foam slabs, which have high density and rigidity.

Many people are interested in: is it possible to insulate the floor in a wooden house with polyurethane foam? Yes, he's great for the job. Experts recommend using a rigid closed-cell material for thermal insulation of the floor in a wooden house below the first floor and basement, which simultaneously performs the functions of steam, hydro and heat protection. It is better to insulate interfloor floors using lightweight polyurethane foam with open cells, which, due to its low weight, does not create a load on the structure.

Insulation technologies

Installation of polyurethane foam can be done in one of two ways:

• spraying;
• filling.

Let's look at each technique in more detail.

Thermal insulation by spraying

Installation for spraying polyurethane foam

Installation of insulation by spraying is carried out using special installations, into which two main components are supplied from separate containers - polyol and polyisocyanate. Then the ingredients enter a spray gun, where they are mixed and applied under high pressure to the surface to be insulated.

Installation of polyurethane foam is carried out as follows:

1. Before performing installation work, a wooden or metal sheathing is mounted on the wall in increments of 30 cm. If the roof or foundation is thermally insulated, there is no need to install a frame.
2. Open the taps on the cylinders where the components are located, pull the trigger of the gun, from where foam begins to flow.
3. The application of foam begins from the very bottom of the wall. The gun must be at a distance of at least 20-25 cm from the surface.
4. In order for the composition to be distributed evenly, it is necessary to move the jet very smoothly.
5. Before moving to a new location, the gun must be turned off.
6. If two-layer spraying is assumed, then the second insulating layer is applied only after the first one has completely polymerized.
7. During the work, you need to ensure that the insulation does not protrude beyond the sheathing; after the foam has hardened, all irregularities must be carefully trimmed with a knife.
8. After polymerization of the insulation, the walls are reinforced with mesh, and then the finishing is done.

Thermal insulation by pouring

This technique involves pouring foam into specially designated cavities. To do this, in those places where insulation is required, small holes are made, into which polyurethane foam is then poured. The foam fills all the voids, crevices and cracks, forming a dense thermal insulation layer.

To fill the insulation, you can use the same settings as for spraying, but in this case it is necessary to reconfigure some parameters. There are also special units that allow thermal insulation to be performed at a higher quality level.

Conclusion

Polyurethane foam allows you to make high-quality and effective thermal insulation of a timber or log house. But insulation with this material requires a competent and professional approach. It is extremely difficult to carry out polyurethane foam work yourself, even with special equipment.

There are many nuances in this work that are known only to specialists, and the experience and skills that professionals possess are also very important. Therefore, the skill of the operator who installs the PPU is of particular importance.

offers its services to residents of the Moscow region for insulating log houses with polyurethane foam. The work is carried out strictly according to technology by qualified craftsmen who have undergone special training and have extensive experience.

To ask your questions or leave a request, go to the “Contacts” section, where you will find detailed information on how to contact us.

Similar articles:

master-srubov.ru

Installation Process Methodology

Fastening options for any material are distinguished, however, when installing good thermal protection, you need to follow the order of layers, which is the same for absolutely everyone. When insulating from a cold basement or underground, heat-saving materials and protecting the insulation material are placed in the following sequence:

1. water protection;
2. insulation layer;
3. vapor barrier;
4. floor design;
5. floor construction.

Compliance with this order will ensure normal temperature and humidity conditions in the house. Next, we should consider in more detail the placement of protection materials.

In a house with an existing wooden floor on the 1st floor, insulation from below can be created by attaching bars with a cross-section from 50x50 to 50x100 to the beams below and placing insulation material between them. After protection from the negative effects of moisture, the resulting pie can be hemmed with boards.

Water protection

Cool air from the basement can fall out in the form of condensation onto the warm surface of the ceiling. The constant presence of moisture on the structure leads to the appearance of mold or mildew, and then to rotting, even if the wood is finished with specialized compounds. Also, condensation is extremely harmful to the thermal insulation layer. It can lead to increased thermal conductivity. To prevent this, a waterproofing layer is placed on the cold air side.

Vapor barrier

From the warm room side, the situation changes. Here the difficulty becomes not liquid water, but warm steam. Penetrating into the thickness of the material, as it approaches the surface from the outside, the steam cools and transforms into water. This process is especially dangerous because, unlike the previous case, moisture does not form on the surface, but in the thickness of the structure. This increases the risk of the insulation material getting wet and breaking down and the wood components rotting.

Vapor barrier – polyethylene film

The vapor barrier layer makes it possible to prevent the penetration of steam from the room.

When insulating the ceiling of the upper floor, the placement of layers changes. Based on physics, it is worth placing protection against steam on the side of warm air, and against moisture on the side of cold air.

In the most common case, polyethylene film can be used as two types of protection. When insulating a basement floor, moisture- and windproof membrane fabrics are sometimes used as protection against the negative effects of moisture. They do not prevent air movement, but reliably retain moisture.

In order to reliably protect the house from the penetration of cold, it is worth thinking about this at the design stage, but measures to protect the basement floor from below allow work to be carried out during operation.

This installation option does not require dismantling the floor covering and does not create uncomfortable conditions for residents.

Video about floor insulation from the basement side with artificial latex:

The main thing is to carefully choose the insulation material and follow all the manufacturer’s advice. This will give it good and long service life. The thickness of the layer is selected depending on the climatic region and the selected material for insulation. Knowing the heat conductivity and layer thickness, even a non-specialist can make competent calculations. This is possible thanks to the convenient Teremok program, which is freely available.

DIY polyurethane foam, floors and between walls, pouring and spraying

You can insulate a house with foam either on your own or by using the services of professionals. Insulating a house is rightfully considered a necessity, and not some kind of fashionable excess. To preserve heat and maintain the required temperature, it makes sense to carefully insulate the house. And this needs to be done, of course, not only in the apartment, but also in the house, during the construction process.

Do-it-yourself insulation of a house with polyurethane foam

What is this foam? This material is a polymer, which, during the reaction between it and moisture, tends to foam, and increases, sometimes 120 times, filling all the free space. And then this foam hardens. If we are talking about polyurethane foam, then the reaction occurs between two polymers. To properly insulate a house with foam, you need to organize good ventilation, that is, a constant flow of air.

A mandatory point is to protect the foam after application from moisture from sunlight, because they destroy the structure of already solid thermal insulation.

Polyurethane foam is completely safe and environmentally friendly, which is why it is used for any residential premises. By the way, this material is also good as a sound insulator. Finally, the low cost allows the buyer to increasingly prefer this particular insulation to others. If the foam is installed correctly, then such insulation will last for many years, it is not afraid of even severe frosts.

Treatment methods or management of polyurethane foam

For insulation, either spraying or pouring is used. If the walls are not yet finished, then you need to spray them. It is imperative to build a minimal frame, which makes it possible to divide the surface into several equal sections, and then the foam itself is sprayed in a small layer. The foam will expand, and you will get such a “fur coat” - it is leveled to one level and finishing is carried out.

By insulating your home with foam, you can significantly improve its thermal insulation qualities.

If we are talking about floor insulation, it is necessary that the logs and slings have already been laid. Thermal insulation of the facade and balcony is carried out in the same way.

When to use fill:

• If it is necessary to insulate a wall cavity that has already been finished externally;
• If the frame is made of several layers of brick.

Filling has its own nuances. This is the uneven filling of the voids - it is not at all visible what is there, behind the wall. And for this procedure to be as competent and accurate as possible, you need a hose that is connected to the spray machine on one side, and the other side is inserted into the wall.

Step by step: insulation between walls with foam

A frame is pre-built on the wall. The wall, as mentioned above, is divided into equal sections, which are then filled. It is mandatory to follow safety precautions: you need to wear a respirator, a plastic suit, goggles and gloves. This is very important, because the foam will not be washed off by either acid or solvents.

If pouring occurs in the cavity of an already lined wall:

• Drill special holes in it in advance; the hose will pass through them;
• Two holes are made for each step, one in the middle of the wall, the other on top;
• Before starting work, all cracks, except the one where the foam will be poured, must be sealed so that the solution does not begin to leak out during expansion;
• Be sure to seal all the cracks remaining in doorways, near window frames and even sockets.

It is quite difficult to insulate a house with foam between the walls, so it is worth contacting specialists who have special equipment

Spraying is applied from floor to ceiling, the layer should be small, you need to constantly move upward. After about 20-40 centimeters, look back and see what layer of foam is formed. If you realize that this is necessary, you need to apply a little foam on top of the already applied layer. In the case of pouring, the hose is installed in such a position that it is directed straight down, and then you just start pouring. First, the liquid will fill all the cracks from below, and then, as it expands, it will rise upward.

The process of floor insulation with foam

Only three stages are enough to allow the floor to retain heat - constructing a frame, insulating with foam, laying the floor covering. If thermal insulation is carried out on an already finished floor, the old floor covering is dismantled and foam is poured. It swells instantly, and a new coating is installed on top of the foam. Well, if we are talking about a wooden floor, in order for the sprayer to gain access to the underground space, the covering needs to be only partially dismantled.

What are the advantages of foam insulation:

• No special surface preparation is required;
• The floor receives absolute sealing;
• There is no need to construct hydrobarriers and vapor barriers;
• There is no need to screed and then wait until it is ready - after just two minutes the foam has complete thermal insulation properties;
• By the way, foam does not give rodents a chance - access is completely closed for them;
• The foam is highly environmentally friendly, because the basis of this material is water, there are no harmful substances in the foam.

According to the manufacturer, the service life of polyurethane foam reaches 50 years. But if we talk about thermal insulation of floors laid on the ground, you need to use mineral wool - this is a more practical option. Although the choice is always yours: the cost of the upcoming repair, the competence of those who will carry out the installation work, and some personal considerations are assessed.

Is it possible to insulate a house with foam (video)

Polyurethane foam is a unique material that demonstrates its thermal insulation properties literally before our eyes. The material is harmless, inexpensive and very easy to use.

Have fun and great results!

Add a comment

heatclass.ru

What is the best way to insulate a building with foam - from the outside or from the inside?

It is difficult to give an unambiguous answer to this, but we will try to do so. One of the varieties of liquid foam, penoizol, is used for thermal insulation of frame buildings . This material fills the air gaps between:

• external and internal walls;
• wall and plastic panel;
• a wall and a sheet of drywall;
• subfloor and floor covering.

Using polyurethane foam, slabs made of solid thermal insulation materials are fixed, and the seams between them are also filled with foam.

Some homeowners use foam to insulate the facade of their building.

Polyurethane is used to eliminate minor defects on walls.

You will get an equally good result if you insulate the walls of frame-type houses, the roof, the attic, the facade of the house, as well as the basement and lower floor with polyurethane foam.

Insulation of the floor in a wooden house from below and above with polyurethane foam, sprayed with PPU foam

Floors in wooden houses are often the coldest part of the room. Wood is a good insulator, but it alone will not be enough to create a comfortable atmosphere. And the cracks and gaps between the boards, which inevitably form over time, do not improve the situation. Insulating the floor in a wooden house will save, according to various estimates, from 20 to 30% of heat - which means significantly reducing heating costs and improving the home climate.

You can insulate the floor in a wooden house using different materials; below are the basic requirements that they must meet.

Requirements for materials for insulation:

• low thermal conductivity,
• high load resistance,
• environmental friendliness,
• Fire safety,
• ease of installation,
• significant service life.

We suggest using polyurethane foam - a material that has all these and some other excellent qualities.

Polyurethane foam is applied to the surface in liquid form from a special sprayer, and after hardening it forms a uniform coating without seams or voids, consisting of tiny gas-filled bubbles. Foam insulation of floors in a wooden house is especially recommended in cases where it is necessary to insulate areas of complex shape. Polyurethane foam will completely fill cavities of any volume and configuration and can be successfully used in the most inaccessible places.

6 reasons to choose floor insulation in a wooden house with polyurethane foam:

1. Very high thermal insulation properties. PPU retains heat better than many other types of insulating materials.
2. Impermeable to moisture. Thanks to its almost completely closed cellular structure, the material has excellent waterproofing qualities.
3. Environmental friendliness. Insulating the floor in a wooden house with foam when using a high-quality composition and carefully following the technology is absolutely safe.
4. Heat resistance. Polyurethane foam does not ignite without direct contact with the flame and goes out immediately when the source of fire is removed. During combustion, it does not emit toxic fumes.
5. Soundproofing. For polyurethane foam it is five times higher than, for example, for polystyrene foam.
6. A wooden house with PPU floor insulation is much better protected from rodents, insects and microorganisms, since this material cannot serve as a breeding ground and habitat for them.

What you need to know if you decide to insulate the floors in a wooden house with polyurethane foam

Spraying polyurethane foam is a relatively quick and simple procedure. However, without being a professional, it is better not to undertake its implementation, since without knowledge of many subtleties and nuances, it will be impossible to achieve high-quality coverage. If you want to insulate the floor in a wooden house using polyurethane foam, contact the specialists. We guarantee excellent quality of materials and work, short deadlines, friendly service and friendly prices. Don't put off your decision until tomorrow, call or write to us right now!

penaprogestpol.ru

The principle of operation of foam insulation

The porous structure of the foam insulator provides an air layer, which ensures an extremely low thermal conductivity coefficient of the product. Liquid foam for wall insulation in cylinders is a special mass that, when reacting with air, foams. The operating principle of this category of construction products consists of the following stages:

• the cellular concentrate is sprayed onto the insulated plane;
• under the influence of air a chemical reaction occurs, a process of intense foaming is observed;
• over a certain period of time, the foam parameters increase to the final volumes;
• then polymerization of the structure occurs.

As a result of insulating the walls of the house with foam in the air gap, the insulator is a monolithic fabric without seams, which provides a high level of heat, water and sound insulation. To spray a liquid foam composition, cylinders, pneumatic equipment and other special-purpose devices are used.

Insulation of floors in a wooden house. How to insulate a floor in a wooden house

Insulating the floor in a wooden house is not only a desirable, but in most cases a mandatory stage of construction. Before you insulate the floor in a wooden house, you need to know that a thermally insulated floor makes it possible to significantly reduce heating costs and create optimal conditions for year-round living in a country house. The insulated design allows you to normalize and maintain the temperature in the premises, both in the summer and in the winter season.

Currently, sawdust and expanded clay as insulation have lost their relevance and are increasingly being replaced by modern materials: polyurethane foam, penoplex, mineral wool. Each of them has its own pros and cons.

Laying mineral wool

All installation work is limited to installing double floors. The primary base should be a subfloor made of untreated boards. Individual elements are fixed to wooden beams using tongues, ensuring a tight fit. Logs are installed on the rough flooring, the distance between which should optimally be no more than 1 m. The resulting space is filled with insulation.

Taking into account the fact that mineral wool can absorb moisture and thereby lose its qualities, it is necessary to lay a layer of waterproofing underneath it. On the other side of the insulation, a polyethylene film is laid, or a PVC membrane is used instead. The last layer of the “pie” is a flooring made of waterproof plywood (fibreboard or chipboard). The last stage is the installation of decorative flooring. Using the presented technology, you can independently insulate the floor in a dacha in a wooden house, even without being a professional.

Insulation with polyurethane foam

Polyurethane foam is excellent for thermal insulation work in wooden residential buildings, the reason for which is the low density of polyurethane foam, which gives minimal load on the supporting structure as a whole. Sprayed polyurethane foam simultaneously performs several tasks: waterproofing, thermal insulation, vapor barrier and sound insulation. A layer of insulation more than 2 cm thick can provide a reliable barrier against moisture penetration. Insulating the floor with polyurethane foam in a wooden frame house requires the use of professional equipment.

The unique application technology ensures the durability and quality of the coating. Due to the porous structure of wood, moisture is quickly absorbed and therefore requires careful thermal insulation.

The technology for insulating a wooden floor with mineral wool and polyurethane foam is quite different. So, if in the first case the installation is complicated by the need to prepare the base for the material, the organization of a waterproofing and vapor barrier layer, then in the second there are no these steps.

The foam clings perfectly to the wood, providing high-quality thermal insulation without any joints, gaps, or seams. Installation is most often carried out by professionals, which results in additional costs.

Features of insulation in a wooden house in the video below.

Insulation with foam plastic in a wooden house

This is one of the most economical options. When choosing polystyrene foam, you need to pay special attention to its density, because for flooring, preference is given to slabs with values ​​of 35 kg/m3. Insulation is carried out using the following technology:

1. The old coating is dismantled down to the rough or concrete base;
2. The logs are installed at a distance of 70 cm from each other;
3. Place a vapor barrier film in the recess between the joists. In turn, it is fixed to the slats using a construction stapler;
4. The foam sheets are adjusted to the required dimensions and their space is placed between the joists;
5. The insulated floor is covered with a polymer film, which acts as a waterproofing layer;
6. The final stage is laying the floorboards and laying decorative flooring.

Insulation of the floor with polystyrene foam in the video below.

Warm floor: air pockets

This method of improving the internal microclimate was previously used everywhere, and not only in relation to gender. Think of old double-glazed wood windows, cavity walls and other similar structures. Today, such voids are more often filled with insulation in order to increase work efficiency, but you can often find solutions to leave air pockets empty. For skeptics, here are examples from today: multi-chamber double-glazed windows of plastic and wooden windows, porous ceramic stone with increased energy efficiency, a wall insulating block with micropores... an air gap allows you to achieve positive results, and therefore this method has the right to life. Although, in some cases of work, it is not as economical as we would like.

Options for installing heated floors with an air pocket:

• Additional timber logs are laid on the finished subfloor. It will be enough to take a wooden pine beam 50x50 mm and lay it along the length of the room in increments of 500-600 mm;
• The next stage is laying the rough plank floor along the joists;
• The final stage is a plywood or OSB flooring, which is the final stage, increases strength and rigidity, and also levels the surface for decorative finishing!