Floor insulation in an old wooden house from below. Proper floor insulation in a wooden house from below. Using sawdust for floor insulation

Every owner of a wooden house knows that in order for the building to withstand the harsh Russian winters, winds and cold, it must be properly insulated. Thermal insulation materials must also be used on the walls of the house, on the ceiling and, of course, on the floor. A lot of precious heat can escape through a cold wooden floor. To avoid tangible expenses for heating, and to make the floor warm, you can use different materials. But now modern high-tech insulation materials are especially popular, which allow the coating to breathe, and at the same time have high thermal insulation properties. Such material is foam or extruded polystyrene foam. In the article, we will consider the features of this insulation, find out its advantages and disadvantages, learn how to properly install it when insulating the floor in a wooden house.

Description and features of floor insulation in a wooden house with penoplex

Penoplex is the collective name for a heat-insulating material. In general, strictly speaking, "Penoplex" is the name of a company that produces building and finishing materials - by the way, ours, Russian. Due to the popularity of their extruded polystyrene foam, this material, even from other manufacturers, is now called polystyrene foam.

Penoplex is made from the same raw materials as the familiar white foam. By the way, the latter can also be used for insulation. However, if the foam is always white, then the foam can be gray, red, and even colored. Penoplex took all its advantages from polystyrene, leaving disadvantages.

Extruded polystyrene foam is produced by foaming the feedstock. As a result of this processing, the output is a light, but solid material, permeated with many tiny air bubbles. Thanks to this air gap, the material has really high thermal insulation performance.

In addition to floor insulation in a wooden house, foam plastic can also be successfully used for thermal insulation of ceilings, attics, interfloor ceilings, walls.

You will learn about the technology of warming a wooden house outside with mineral wool for siding.

The advantages of the material expanded polystyrene, comparison with polystyrene

Let's find out what are the advantages of floor insulation in a wooden house with penoplex.

This insulation provides reliable protection of the room from the cold. The material has really high and reliable heat-insulating performance. In addition to the fact that the material retains heat well in the house, it also has high soundproofing properties.

Compared to styrofoam, styrofoam is more durable. Many people know how easy it is to break a fragile foam sheet. With modern penoplex, this will not happen.

Due to the fact that this is a solid material, over time it will not sag, exposing sections of the floor. By the way, a similar incident often happens when warming with soft materials, for example, mineral wool. Penoplex is resistant to deformation, easily resists compression.

In addition, you may be interested in the material about features.

Penoplex is resistant to moisture. This is a really important nuance, since the house can be located in a swampy area or on a flooded area. Mineral wool, for example, will not withstand moisture.

Penoplex is convenient and easy to install. There is no need to wear respirators and protective clothing. The plates of this material are light, if necessary, you can achieve the desired size by simply cutting the plate with a knife. Penoplex easily “gets up” on the glue, while being securely fixed.

Penoplex is not gnawed by mice, bugs and other insects do not start in it. For an eco-friendly wooden house, such a problem sometimes becomes a direct threat to the preservation of heat and the integrity of surfaces. For example, mice are very fond of settling in soft mineral wool. But with penoplex, this, fortunately, will not happen.

Due to its artificial origin and resistance to moisture, penoplex does not rot, deteriorate or decompose at all. The material is eco-friendly, completely safe for those living in the house.

The safety of this insulation is also manifested in the fact that the penoplex does not emit any toxic substances. During operation, it, unlike mineral wool, does not “dust”, does not cause allergic reactions. In addition, extruded polystyrene foam is odorless.

Penoplex is of different types. You can choose a non-combustible variety, which is important for a wooden house.

Characteristics of foam insulation.

The material is laid in a rather thin layer, but due to its high thermal insulation characteristics and density, this is quite enough. Therefore, penoplex can also be considered a rather economical type of insulation.

If you correctly carry out the installation, and choose a high-quality penoplex from a trusted manufacturer, the material is able to serve for a very long time without any loss of its technical characteristics. With careful operation, manufacturers guarantee the uninterrupted service of penoplex for at least 55 years.

How and with what to insulate a brick house from the outside, it will tell you.

Minuses

For balance, it is necessary to find out the disadvantages of floor insulation using penoplex.

The material has a rather high price. Some homeowners are put off by this. However, we must not forget that the laying of foam plastic does not require a thick layer.

The material is completely artificial. But thanks to this, mice and bugs do not start in the penoplex. So it is quite possible to consider this disadvantage as an advantage.

Penoplex does not withstand too high temperatures, deforming at the same time. But these temperatures are from plus 80 degrees on one side and minus 90 degrees on the other. Infrequently there are such differences in life, therefore, we can say that this drawback does not greatly affect the quality characteristics of the material.

The material does not tolerate strong mechanical stress. Do not forget that in fact, these are balls inflated with air or gas, so the foam is quite fragile. You should not jump, run on the laid surface, not yet protected by the floor covering.

Summary: compared to the list of pluses, the shortcomings of the material look completely unnoticeable, so you can safely go to buy this high-quality and durable insulation.

Read also about foam insulation of the foundation from the outside.

How to style

In a wooden house, the floor is mainly blown due to the fact that the boards dry out over time, and gaps form between them, sometimes quite large. But if the floor is insulated with high-quality material, then even as a result of drying out of the floor covering, the heat in the house will not become noticeably less. Our recommendations for the competent installation of penoplex when insulating the floor in a wooden house.

What you need

What tools and materials may be needed when insulating the floor with foam.

• Roulette, large ruler;
• Construction flat pencil;
• Level. Maybe laser.
• Stationery knife;
• Chisel;
• Construction gun for sealant and, in fact, the sealant itself. This material will be needed to carefully fill all the joints and voids and gaps formed during the laying process.
• A film with vapor and waterproofing properties is required.
• Well, actually, the extruded polystyrene foam itself.

You will read all the information about foam adhesive for outdoor work.

It should be noted that wooden floors can be insulated with foam in various ways. The most common and simplest of them is joist insulation.

The result is a really warm floor. But in this case, high-quality waterproofing is necessary.

Stages of work

The horizontal surface under the floor must be carefully cleaned and leveled. If you decide to insulate the floors in an already inhabited house, then before carrying out work, it is necessary to dismantle the floor covering. If it is still in good condition, then remove it carefully so that after work you can lay it back in place. Well, if you plan to replace the coating, then you can not stand on ceremony, and shoot quickly. Check the condition of the subfloor. If it is deformed or there are defects, carry out work to strengthen it.

Prepared wooden logs must be positioned and fixed in such a way that there is no more than 70 cm of space between them.

The boards on which the penoplex will be laid must be hemmed to the logs or fixed to bars specially designed for this.

Before laying the insulation, it is necessary to treat the logs and all wooden elements with antiseptic solutions. This precautionary measure will protect the tree from rotting and damage by bugs. After the antiseptic, treatment with a moisture-repellent agent will also be useful.

On boards or plywood, you must first lay out a layer of dense waterproofing film, so carry out work on the installation of waterproofing. Keep in mind that this material is overlapped (about 15 cm) to ensure complete tightness and good moisture protection.

It is possible that it will be useful for you to study the material about.

Scheme of insulation of the floor covering.

The next step is the direct laying of insulation on wooden boards. When laying out penoplex, carefully monitor that there are no gaps and cracks in the process of work. Careful laying of the material will provide reliable protection from the cold.

For additional protection against moisture, you can stretch a plastic film on the surface of the insulation. This technique is of particular importance if the house is located in a swampy area and the climate is rainy.

Flooring is laid on top: laminate, parquet, solid wood, etc.

By the way, similar work can be done in an ordinary apartment. Such insulation is of particular relevance if you live in an apartment building on the ground floor.

Penoplex can also be used as an insulator for the "warm floor" system. In this case, it will provide additional protection of the room from blowing and heat loss. In order to lay the material in this case, a concrete screed with floor pipes built into it is used.

Video

On the video, how the floor is insulated in a wooden house with penoplex:

We examined the features of penoplex as a heater for floors in a wooden house. It is important that the installation is quite realistic to carry out independently and that the penoplex has really outstanding performance characteristics. Thanks to our recommendations, as well as your own diligence and accuracy, you will be able to provide your country house or cottage with high-quality underfloor heating.

No matter what material the house is built from, it is possible to create comfortable living conditions only if thermal insulation work is carried out. Only in this way the house will be warm and cozy. If you decide to take on floor insulation in a wooden house from below, then today it will not be difficult to do this if you choose the right heat-insulating material, and also do all the work strictly according to plan.

Materials used for floor insulation in a private wooden house from below

Going to the building materials store, you can see how wide the range of products in question is. Each heat insulator differs in its size, characteristics and installation method. The choice of this or that material depends on the personal wishes of the owner and the characteristics of the flooring.

Mineral wool

For thermal insulation of a cold wooden floor, mineral wool is often used. The heat insulator is produced in the form of elastic mats and panels. The process of its installation is carried out in one layer.

Mineral wool insulation

The main advantages of the material include:

• high noise and heat insulation performance;
• long service life;
• resistance to fire and high humidity;
• acceptable cost;
• safety;
• resistance to mechanical and chemical factors.

polyurethane foam

The material is ideal for thermal insulation of the floor from below. Its peculiarity is that it contains pores that are filled with air and gas. Polyurethane foam has a low weight, but at the same time it perfectly retains thermal energy. Possesses the maximum resistance to formation of a fungus, a mold. Resistant to rot and acids.

Insulation Polyurethane foam for the floor

Polyurethane foam is laid using a special technique, and it is also characterized by excellent adhesion to the surface. With the help of this material, it is possible to insulate the floor of various shapes without forming joints. And here is how the front door is insulated with one's own hands with such material and what material can still be used to insulate, it is indicated

Styrofoam

This heat insulator for floor insulation from below is considered the most popular. Due to its special structure, a low level of vapor permeability and heat conductivity, resistance to fire is achieved. The material is also distinguished by reliability and resistance to the influence of mechanical and chemical factors.

Insulation foam for the floor

Polyfoam has a long service life, while it retains its heat-insulating ability. Its main disadvantage is that it absorbs a small amount of liquid, which adversely affects certain properties. And here is how the floor is insulated in a wooden house from below with foam plastic, it is indicated

Penoplex

Insulation penoplex for the floor

The heat insulator is highly reliable, resistant to low temperatures. It will show its thermal insulation qualities for a long time and will create reliable protection against moisture penetration. But how to insulate the floor with penoplex in a wooden house, and how easy it is to do, is indicated

Expanded clay

Thermal insulation of a wooden floor can occur using expanded clay. This is a bulk material, which is characterized by a porous structure. A heat insulator is produced by firing slate or clay in a special furnace.

Expanded clay insulation for the floor

Expanded clay is a durable and environmentally friendly material. It is characterized by high rates of sound insulation, resistance to fire and frost. But expanded clay has one minus - after a while it becomes too dense due to its own weight and loses its heat-insulating qualities. But how the wet facade is insulated with a heater, this will help to understand

Penofol

This material for floor insulation is produced in the form of rolls. Received on the basis of polyethylene foam, which is covered with aluminum foil on top. The thickness of the material is 3-10 mm.

Penofol insulation for the floor

Izolon

This heat insulator today enjoys a wide scope due to its versatility. Isolon is an elastic type polyethylene foam that has a cellular structure, where each cell is of a closed type. It can be obtained in different densities and thicknesses, which once again confirms its versatility.

Floor insulation isolon

How to make insulation

The most effective and reliable way to install a heat insulator from the bottom of the floor is laying along the logs - transverse bars, on which the floor covering will be concentrated.

The process of warming is not difficult if you follow the following procedure:

1. Fix the bars on the foundation in increments of 1-1.2 m.
2. Fix chipboard or thick plywood on the boards. For fastening, use self-tapping screws. This stage is important for the installation of the thermal insulation layer.
3. Lay the selected heat insulator on the surface between the bars. The thickness of the laid layer can be different, so the dimensions of the transverse logs must be taken into account.
4. Lay a layer of waterproofing on top of the insulation. Most often, polyethylene film is used. This is not always necessary, as there are a number of heaters that have an increased level of resistance to moisture.
5. At the final stage of installation, the installation of a wooden covering takes place. It can be old or new material.

Video: floor insulation from below with penofol

On the video, floor insulation in a wooden house from below with penofol:

How to insulate from a basement

Insulating the basement in a private house is extremely necessary. Thanks to this, it will be possible not only to reduce heat loss, but also to protect the house from dampness and destruction in the future. For thermal insulation work, you can use penoizol, polystyrene, but mineral wool can be used to seal the ceiling from the basement. With the help of polystyrene, the floors and walls of the basement are insulated.

The first step is to prepare the surface. And for this, remove all debris and pollution, walk with an antiseptic and a primer. This will protect the surface from decay, and will also make the adhesion of the material to the surface more durable. Mounting a heat insulator is a simple matter that even a beginner can handle. It is necessary to apply glue to the surface of the heat insulator, and then immediately attach it to the ceiling.

It is also worth paying attention to how

On the video - floor insulation in a wooden house from the basement:

It will also be useful to learn more about how windows are insulated with heat-saving film, and how it is

Warming the floor from below in a private house is a necessary measure to create a comfortable and warm environment. The main thing in this matter is to choose the right heat-insulating material. And although the choice today is very wide, you need to choose the insulation that will be convenient in terms of installation, suitable for your operating conditions and will become a reliable protection against heat loss.

In order for the house to be pleasant and comfortable, it is not enough to have only a roof and walls. It is necessary to make sure that there is warmth in the house. That is why the issue of floor insulation in the house plays an important role. By insulating the floor, you can not only provide comfort, but also significantly reduce heating costs. After all, up to 20% of heat can be lost through the floor. With the help of effective thermal insulation of the floor, you will be able to maintain the desired favorable temperature in the house. It is better to carry out work on insulation even at the construction stage. They must be taken into account in the design. It is very important to insulate the basement. You can carry out all the work yourself. There is nothing difficult in this. You will learn how to insulate the floor below.

Floor insulation at the time of construction of the house

If the construction of the house has not yet come to an end, then it is advisable to insulate the floors from below. Here, expanded clay backfill will be very popular.

There are two options here:

1. elimination of the cavity between the beams to the fullest;
2. elimination of the cavity between the layers of boards.

In the first option, geotextiles are placed directly on the ground. Then, in the subfield, the distance is completely filled up to the top of the beams. Next, a floor of boards is installed on the logs. It is worth noting one caveat that the use of this method makes sense only when the distance to the ground is small.

In the second case, two layers of the floor are made. Backfill is placed between the layers. It is worth making the floor insulation from below from the cold. To do this, the shield from the board is hemmed to the beams. It is fastened with screws or nailed. The boards fit as closely as possible to each other.

Filling is done on top. Logs are mounted on the beams. After that, the flooring is done. Sometimes installers provide floor ventilation. In this case, masses of cold air can freely enter the house through a bulk insulation system. Due to such ventilation, it is possible to protect the floor of the house from mold.

But in this case we get the following situation. If the basement is cold, then cold air will penetrate directly into the house. Fixing this problem is easy. It is enough to put a film of polyethylene or some other airtight material on the insulation.

At the same time, it is important to carry out work in such a way that ventilation is maintained. If you lay a polyethylene coating under the insulation material, then condensation in the form of water vapor will accumulate on it. This will only make the situation much worse.

Bottom floor insulation materials

Warming in the house or in the country with the help of this material is one of the most common ways. Cotton wool is glass, slag or stone. The great advantage of this material is that it is absolutely non-flammable.

It also has other advantages. These are biological resistance, resistance to fire, high heat and sound insulation characteristics. But this material also has its drawbacks. This is a low mechanical strength. Mineral wool perfectly absorbs moisture, while its thermal insulation properties may be somewhat lost.

So, if you decide to mount such a heater, it is important to pay due attention to steam insulation. This insulation can not be attributed to completely harmless materials.

Mineral wool is produced in the form of a flexible mat or a dense plate. The denser part of the plate is marked with a blue stripe. When mounting, make sure that the marking points upwards. Mineral wool is often used in a wooden house or in a country house. Plates are mounted in one layer.

Izovol, which is made on the basis of mineral fibers, has a low thermal conductivity. Izovol is a non-combustible material. Rockwool - basalt insulation. It has good resistance to external loads. Due to the special design, it practically does not change shape. In addition, it can perfectly level out sounds.

Insulation is placed between the lag. Everything will depend on whether it is possible to hem the shield from the boards to the beams from below. If the subfloor is low, the shield is attached to the beams from above between the joists. If necessary, the lags can be raised. Further execution of the procedure is quite standard.

Styrofoam

Very often, insulation in a private wooden house or in the country is carried out using foam. This material has a huge number of advantages. But he has almost no shortcomings. Styrofoam insulation can guarantee high strength, resistance to fire and various chemicals.

If you decide to carry out insulation in a wooden house, foam insulation will be a very effective option. This material has a unique cell structure, which makes it durable. It has the same disadvantages as mineral wool. It easily absorbs moisture, as a result of which it can quickly lose some properties.

Insulation can be carried out with foam or extruded foam. The latter has a particularly strong structure. The process of foam insulation is the same as that of mineral wool insulation. But there are also some features. In the best case, the width of the insulation and the lag should be the same. After all, the foam will act as a special support for the flooring.

Laying of plates is carried out with minimal gaps. All gaps must be foamed. Vapor barrier is not needed here. Thick plates are mounted among the lag. After they are simply foamed. Hemming of the shield from below is not performed.

To blow out ecowool, you will have to use a compressor. Without him, nothing.

Insulation using industrial equipment

Ecowool is blown with a compressor into the hole between the floor. In this case, the voids are uniformly filled with material. After removing the flooring from above, the ecowool is laid using the wet method. It contains sticky particles.

It is due to them that the layer turns out to be quite rigid. After that, he will not sit down. Vapor barrier is not provided. After all, the material is not afraid of moisture.
With polyurethane foam, it is possible to completely fill the existing space between the beams. In this case, you will get excellent thermal insulation, which will last for many years.

Insulation for small heat leaks

Quite often, in a private house or in a country house, cold penetrates into the room through poorly connected or dried out boards. You can eliminate such gaps in a wooden house only if you decide to completely redo the floor.

In this case, it is advisable to use a roll insulation from below instead of re-laying. You can insulate the floor in a private house with penofol. This material is a foamed polyethylene, in which the surface is finished with foil.

The surface that reflects the light turns towards the warmer space. Thus, heat leakage is quite effectively prevented.

If you decide to insulate the floor with penofol, you will have to re-lay the old floor covering. At the same time, you should not make too thick a substrate from below. Otherwise, the floor will spring too much. Linoleum, on the other hand, can push through furniture legs. If the material thickness of 0.4 cm is not enough, it is better to take a denser material for laying. For example, it can be a cork substrate.

If you do not want to carry out serious repairs in the apartment, you can insulate it with penofol from the underground. Rails can be used for fixation. They are stuffed on top of the insulation.

Insulation in the house from the basement

Thermal insulation of the floor of a private house from the basement has a very important role. With the help of high quality heat insulation, you can not only reduce heat loss, but also protect the house from dampness and destruction in the future.

Many professionals say that basement insulation from below will help solve a large number of problems that may arise in a private wooden house. For thermal insulation of the basement, you can use foam, penoizol and other materials. You can use mineral wool to seal the floor from the basement side.

The width of the lag and pieces of insulation when using foam should be the same.

With the help of polystyrene foam, only the basement floors are usually insulated, but also the walls. If your house has a cool floor, then before purchasing a heater, you should think about how to insulate the basement.

Video

You can watch a video on how to properly insulate a wooden floor from below.

The floor is one of the cold elements of a wooden house. Cold air flows directly to the floor. Often, coolness also comes from its underside. To reduce the cost of rapidly escaping heat, it is worth insulating the floor in a wooden house from below. As soon as cracks appear in the floor, a draft begins to flow into the room, which leads to an average of up to 30 percent of heat loss.

The technology of warming the lower part of the house does not cause any particular difficulties. Heat insulation can occur with the use of completely different types of heaters. However, before proceeding with the repair work, it is worth paying attention to certain parameters:

• conditions for the functioning of the floor covering (humidity level, temperature, purpose of the room, expected load percentage);
• what layer of insulation should be laid.

Doing the work on your own will not be too difficult. The main thing here is to remember that insulation includes three main layers:

• heat insulation;
• isolation of the emitted steam;
• direct floor covering.

All of these components carry an important semantic load.

Sequential stages of work

Insulation of the lower part of the room occurs with the implementation of several mandatory steps. These include:

• Shields made of wood (rarely boards) are fixed to the bottom of the lag. This will be a kind of coating, an additional base. It is intended to lay thermal insulation;
• The distance between the lags is filled with insulation. The layer must be tightly fixed. In the event of a space between the sheet and the lags, you should resort to the help of a specialized sealant, foam for installation work;
• Following the insulation, a material must be installed that is responsible for isolating the resulting steam. The material must be fixed on the logs. The resulting gaps, joints should be covered with adhesive tape, preferably metal;
• The final stage is the laying of wood flooring, the final finishing of the floor.

When choosing the thickness of the material layer for heat insulation, there are no specific criteria. Parameters must be selected individually for each type of room.

Warming along the lags

A separate item should be considered insulation along the floor logs from below in a garden wooden house. The advantage of this type of heat preservation is ease of operation. At the same time, you will be able to save a fairly large amount of heat in a private house. So, work on insulation should take place in this way:

• wooden logs are installed;
• boards are mounted on which thermal insulation is laid;
• vapor barrier is laid;
• all this is covered with boards for the subfloor;
• the final stage is the installation of the coating.

The considered option is distinguished by its efficiency in operation. The implementation of all stages of work does not require the intervention of specialists, everything can be done with your own hands.

What material to use?

Today in the consumer goods market you can find a large selection of materials for heat insulation. Each of them is endowed with individual, characteristic properties, a range of sizes, a method of installation, and a price segment. Among them:

• mineral wool;
• expanded clay;
• Styrofoam;
• sawdust and others.

Insulation with sawdust

The considered method belongs to one of the oldest types. The main advantages of sawdust insulation are ease of installation and low cost. At the same time, it is possible to lay this type of insulation in hard-to-reach places. An important factor here is the environmental friendliness of the material. In addition, they can be used as a single material, or as one of the components of the mixture for construction.

Warming with mineral wool

If the house was built more than a dozen years ago, then mineral wool will be the best choice as an insulating material. Today, this type is the most popular among consumers. The material attracts with its ability to resist fire.

In addition, the following positive characteristics were noted:

• resistance to biological, chemical attack;
• high level of heat insulation performance.

However, along with the positive characteristics, there are a number of negative points. It is worth paying attention to them before work begins on warming the wood floor from below. These include:

• low mechanical strength;
• steam penetration is low;
• cotton wool perfectly absorbs liquid, however, at the same time, its insulating properties of heat lose their performance.

In connection with the latter, close attention must be paid to the additional installation of steam insulation.

Mineral wool of mineral origin is sold in slabs, mats. The side with a higher level of hardness is marked with a blue stripe. The material is laid in such a way that this strip is located in the upper part. For a wooden floor, it is preferable to choose slabs. To ensure reliable heat retention, it will be considered sufficient to lay one layer of material.

Polystyrene insulation

Polystyrene is otherwise known to consumers as Styrofoam. Today he is among the leaders among insulating materials. This is due to the fact that the foam has a huge number of positive characteristics. The negative ones are kept to the bare minimum. The insulation is characterized by low rates of heat conductivity, steam penetration. It perfectly resists fire, chemical, biological influences. The structure of the material is cellular. This allows the foam to be in operation for a long time, while not losing its effectiveness as a heat insulator. Of the more significant drawbacks, good absorption of moisture can be distinguished. Sometimes this can cause some properties to lose their relevance.

Insulation with polyurethane foam

The material under consideration has a similar structure structure with polystyrene. In this case, the pores are filled with air, gases. This allows you to create a low level of heat conductivity in the material. In addition, the weight of polyurethane foam is negligible. Today it is recognized as the best insulation. Important advantages of the insulating element can be called:

• resistance to acids, alkalis;
• no rotting with a long period of use;
• no mold formation.

There was no particular difficulty in installing the considered type of thermal insulation. However, there are still certain nuances. So, for example, polyurethane foam is applied by spraying. It is impossible to do this without the use of specialized equipment. Tight, reliable fit of the material to any kind of surface allows you to spray it almost everywhere. This application method will allow you to insulate any surface, while its shape, size will not matter. The material lays down in an even layer, each contour will be observed. The formation of joints in this case is excluded. Polyurethane foam is practically not able to absorb moisture, which leads to the absence of the need to install a vapor barrier layer.

Conclusion

We have considered far from all the insulating materials that can be found on sale today. However, it is necessary to insulate the floor. A warm floor is needed not only in order for the building to be able to retain as much heat as possible, it will create a cozy, homely atmosphere in each separate room.

Of course, you can entrust the type of work in question to specialists in this matter. However, not every homeowner has the financial means to do so. In this case, it is worth resorting to the option of independent work: special skills are not required here. The main thing is to remember that there is a certain algorithm that should be strictly adhered to.

The most important stage in the construction and repair of a private house is the insulation of floors, since comfort and coziness in the premises is created by maintaining the optimum temperature. In the article, we will consider the option of insulation with laying from below.

Warming methods

Thermal insulation of floors in a private house is required in the following situations:

• for floors located above cold floors and cellars;
• for laying in floors between floors;
• for processing floors under the attic, if any.

When the floor is insulated in a wooden house from below, the following problems are solved:

• extra costs for the operation of the heating system;
• violations in the temperature and humidity conditions at home;
• rotting of materials in the construction of floors;
• formation of mold, fungus, etc.

When a house is built from scratch, it is recommended to take care of a high-quality thermal insulation layer. In this case, everything is much simpler, because the laying is carried out layer by layer, and the owner can think over the floor plan in the house on each floor in advance. Naturally, based on personal preferences, the owner can create such ceilings and floors that he will proudly post in photos on social networks and show off to his guests.

Causes and features of thermal insulation from below

When attic floors are processed, insulation can be laid from above, and floors more effectively perform heat-shielding functions when laid from below.

This is due to the following reasons:

• the height of the room does not decrease at the level of the first floor;
• the insulation should not be dense and rigid in order to withstand the mechanical load created on the floor;
• not only the floor surface is protected from freezing, but also the entire wooden floor;
• the dew point shifts towards the floor surface, keeping the inside of the structure from rotting.

However, before insulating the floor in a wooden house from below, it is worth noting that such a process has certain disadvantages:

• laying insulation requires an additional fixing procedure;
• the installation process is much more complicated when it is necessary to work in a low basement or cellar (more: "");
• when working with a ceiling, workers quickly overtake fatigue;
• insulation options are limited.

Requirements for the materials used

The essence of this method of laying is that you can not use any type of insulation.

It is important that the materials for floor insulation in a wooden house meet the following criteria:

• the mass should be low, since a high load on the floor is unacceptable;
• the use of the material should be convenient and simple;
• the efficiency of the created heat-insulating layer should be high;
• the structure must be connected, therefore bulk materials cannot be used;
• it is advisable to choose a refractory material in order to increase fire safety in the house.

Based on the criteria presented above, it is recommended to use mineral wool rolls, foam plastic or polyurethane foam.

Mineral wool is represented by rigid slabs that can be laid between floor beams. In this case, the slab must exceed the distance between the beams. Fastening in this case is carried out due to the friction of the material and wooden beams.

A similar laying method is used when working with a mansard roof. The material itself is highly efficient, non-flammable, slightly absorbs moisture and is resistant to biological attack. The disadvantage is that each worker must be protected from the fibers of the material, and this will require masks and overalls.

The low strength of the material is not a disadvantage, but flammability and poor resistance to low temperatures and high humidity really create inconvenience. The popularity of the material is due to its low cost, but its shortcomings will have to be eliminated with the cost of additional processing.

As for polyurethane foam, it has the following advantages: ease of installation, reliable fastening with filling of any surface defects and hard-to-reach places, effective thermal insulation and protection from various biological factors.

Polymer materials, of course, cost more, but there are fewer questions about their quality, which leads to an increase in their popularity among private homeowners. The disadvantage of this material is its combustibility, like many polymers, as well as the need for its lining.

Mounting procedure

Although the laying technology for all types of material is different, the arrangement of the layers is always the same.

When insulating floors from below, it is necessary to lay the layers in the following order:

• waterproofing;
• heat-insulating;
• vapor barrier;
• overlap;
• direct flooring.

Subject to the laying technology, the room will always maintain normal temperature and humidity.

As for laying, it will not cause difficulties in the case of all the materials listed above. Mineral wool and polystyrene are laid between the floor beams. As mentioned above, the foam will be held by friction with the wood and larger sheets than the spacing between the beams, and wadding is a material that densely fills any spaces.

It is not necessary to ram cotton wool to avoid a decrease in its characteristics. Polyurethane foam is applied in uniform layers and its amount should be calculated in advance so that during the work you will not face the problem of a lack of material. Buying too much, the owner becomes the owner of another problem - high cost.

waterproofing layer

Cold air from cellars and basements tends to condense on warm ceilings. The wood used in construction is subject to rotting under regular exposure to moisture, and therefore it is impossible to do without a waterproofing layer.

Vapor barrier layer

Outcome

The article talks in detail about how to insulate wooden floors in a private house from below at each level of the building. With the correct execution of all work, you can get high-quality floors that will last for many years.

Difficulties that have arisen during the installation process will be solved by specialists who will take responsibility for all stages of insulation and laying floors. Clarity and professionalism in carrying out such work will help to avoid unnecessary spending on materials and possible rework if mistakes are made.