How to attach polystyrene foam to wood: materials, methods and instructions

Types of material

The product is one of the types of polystyrene foam, therefore it has many of its characteristics. This is a special polymer filled with gas. The composition of the material is foamed polystyrene, various additional substances that improve its structure, as well as a small amount of water. Manufacturing technology allows us to obtain a unique product with high thermal insulation properties. Expanded polystyrene also perfectly prevents sound transmission.

Floor insulation in the house Source masterskayapola.ru

The material is produced by various methods, depending on which it acquires certain characteristics. The result is products with different densities, so each type is used in a specific area. Also, the manufacturing method affects the final cost of the substance. Main production methods:

• Pressless. These are granules dried several times and then foamed. This material is very fragile and retains moisture well inside.
• The pressing method has low thermal conductivity. The granules are subjected to additional compression, due to which they close and change the structure of the product. The material turns out to be of higher quality, but the manufacturing technology takes longer, which increases the price of such foam.
• The autoclave method is used quite rarely, since its production requires a special device. This material is practically not used for home insulation, since its characteristics do not meet the task.
• The extrusion option provides for the production of household products. Various foams, packaging and other products for household needs are made from it. This polymer is not used for insulation.
• The extruded method is most often used to produce materials that can then be used to insulate a home. This is a type of pressless manufacturing, but it must involve an extruder. The product retains heat well, since its pores are very small in diameter, they are maximally closed to external influences. Thanks to these indicators, this type has become widespread among craftsmen and users; it is presented in a large assortment on the construction market.

Work on insulating a wooden house Source rubankom.com

Mineral wool

It is worth noting that stone wool made from basalt rocks is quite often used (its characteristics are described in detail here). But it has a “minus” - it cannot be compressed. Therefore, very precise sizing will be required, and therefore labor costs will increase. The use of glass wool is associated with additional installation difficulties, in particular, with measures to protect the skin and respiratory tract from its dust.

Therefore, it is more advisable to use mineral wool. However, it must be taken into account that working with ecowool requires certain professional training.

For high-quality insulation, the density of mineral wool must be at least 30 kg/m3. It is better (more convenient) to use the material in the form of slabs rather than rolls. Thickness – 50 mm.

• High vapor permeability.
• Practically does not “shrink” during operation.

Technology

The total thickness of the “insulation” is usually from 10 cm. Therefore, installation is carried out in at least two layers, with offset joints between the slabs. They are placed “at odds” between structural elements (racks). The material shrinks slightly, and after laying, increasing in size, it is tightly fixed at the landing site.

Unlike foam plastic, joints are sealed with reinforcing adhesive tape. In this regard, the insulation process is simpler.

General recommendations

• Polystyrene foam is a dense material, so it will not allow the walls to “breathe.” Cotton wool absorbs moisture well. Based on this, the issue of natural ventilation is one of the paramount ones.
• A material such as glassine is excellent for waterproofing. But there must be a gap between it and the insulation (an air gap for ventilation).
• To reduce the amount of work associated with processing the material, you need to decide in advance on the size of the slabs. Based on this, mount the frame with the required distance between the posts (according to the width of the products).
• For high-quality protection of the foundation, it is better to use permanent formwork, which is mounted from slabs of the same extruded polystyrene foam. It simultaneously serves as both a mold for pouring and an insulator (hydro- and heat).

Conclusion

There are different opinions regarding the quality of insulation with this or that material. Some people may praise the same “thermal insulator” too much, but others may not like it. Here you need to understand the following.

Firstly, a lot depends on the correct choice of “product”. In this case, you must first of all focus on the conditions under which it will be used.

Secondly, the quality of thermal insulation largely depends on the conscientiousness and professionalism of the workers. After all, ill-considered actions, violation of technology and irresponsibility can ruin anything.

Before choosing the appropriate material, it is a good idea to consult with people who already live in a frame house, and most importantly, built it with their own hands. Their assessment given to the insulation used will be quite objective. You can read the material on insulating a house from the outside, where similar work is described.

There are also cheaper options - filling the gap between the walls with expanded clay, sawdust, even straw. But here everyone must decide for themselves, taking into account the following aspects:

• the walls will be thicker;
• maintainability is “zero”, since the entire structure will have to be disassembled;
• except expanded clay, all other materials quickly get wet.

We have indicated only the main aspects of insulation work. But the wall of a frame house itself is a “pie”, in which, in addition to insulation, there are other layers (waterproofing, vapor barrier). Therefore, it is necessary to study the features of their arrangement, as well as the criteria for selecting appropriate materials.

How to insulate a wooden house with foam plastic

To understand how to glue foam to wood, it is important to study its structure. The material is most often supplied in the form of lightweight but durable slabs, the thickness of which can vary significantly depending on the type and purpose. The structure of the substance allows it to work effectively in any weather and temperature conditions - it is not afraid of mechanical damage and natural factors.

Walls of a house with polystyrene foam Source otdelkaexp.ru

Due to its unique composition, expanded polystyrene is successfully used for both internal and external insulation of homes. The difference will only concern the method of fastening the material:

• The house can be insulated from the inside by placing sheets of polystyrene foam on wooden walls. This method is not used often because it has significant disadvantages. Expanded polystyrene for interior decoration has high heat-insulating properties; it also does not allow moisture and water vapor to pass through it. As a result, the walls will not warm up well, but they will be exposed to cold and wind from outside the room. This can lead to the formation of a dew point inside the room, which can lead to the accumulation of condensation between the wood and the insulation layer. Constant exposure to liquid is dangerous by the onset of putrefactive processes, the appearance of fungus and mold on the surface of the walls.
• The external method of insulation is increasingly used by craftsmen in the construction and renovation of houses. Its second name is a ventilated facade, which has special properties. When installing insulation, waterproofing is used to protect it from the effects of weather factors. Also, this method allows the sheets to be constantly ventilated, which has a good effect on the durability of such a coating. The only drawback of the solution is the high cost compared to the internal option.

A wooden floor can also be insulated using expanded polystyrene - in this case, sheets of material are laid between the floor joists. If the first floor is being finished, this method prevents cold air from entering from the ground, and in the case of intermediate floors, stabilization of the temperature regime is achieved. The heat is evenly distributed between the rooms, which avoids overheating of the upper rooms. Insulated floors help create a normal microclimate in the house if the upper floors are not heated in winter.

Insulation of a wooden floor

The most common way to insulate a wooden floor is through joists. If you have to insulate the floors in a habitable house, then the floor covering must first be dismantled. After opening, the board/plywood base and joists are treated with antiseptic and water-repellent agents. Then the following actions are performed:

1. A layer of dense waterproofing film is laid on the base under the logs.
2. Penoplex strips, cut to size, are laid in the space between the joists.
3. Floorboards, parquet, laminate, etc. are laid on top of the thermal insulation coating.

Advantages and disadvantages of the product

The production of the material is possible only in production; polystyrene foam cannot be made at home. The substance contains styrene, which is a waste product from oil refining, so the product is not highly safe and environmentally friendly. Despite this circumstance, polystyrene foam has significant advantages:

• Low price, which is significantly inferior to other types of insulation.
• Good density, allowing you to effectively retain heat indoors.
• Low weight and excellent elasticity.
• Does not allow sounds to pass through walls.
• Easily tolerates interaction with liquids.
• Widely distributed in stores, you can find different types of products for specific tasks on sale.
• Large selection of structures and shades.
• High resistance to various adhesives and dyes, chemical inertness.
• It does not rot and is durable - the decomposition of the material can last for years.
• It is not subject to ignition, which allows you to protect a wooden house from fire.
• Long period of operation, which is more than 15 years.
• Easy to cut and install, they can be done even without the use of special equipment.

Building walls with foam plastic Source remontami.ru
The negative aspects of the material are associated with its synthetic origin, as well as its complex structure, including many chemical compounds. Among the disadvantages of polystyrene foam are the following:

• Poor tolerance to sunlight, prolonged exposure to which leads to damage to the product. Also, the initial properties of a substance can change significantly.
• Flammable substances and solvents can damage the structure of the material. It is dangerous to use gasoline and fuel oil.
• Animals and insects can easily destroy or damage polystyrene foam.
• When ignited, a large amount of harmful substances are formed that are extremely dangerous to human health. Inhaling them can be fatal.
• The material should not be heated, as this results in the formation of toxic compounds. For this reason, it is prohibited to use polystyrene foam in baths and saunas.

Insulating a house from the inside Source stroyrem-nn.ru

Benefits of Penoplex

Unlike most materials for similar purposes, extruded polystyrene foam:

• has a low thermal conductivity coefficient of 0.030 W/m*K;
• has low water permeability;
• the slabs are light in weight, the material density is 25–48 kg per 1 m³;
• has high strength 0.2-0.6 MPa;
• has a high coefficient of elasticity in compression, and is easy to cut blanks;
• the modified material is resistant to temperature changes and open fire (flammability class G1 and NG);
• non-toxic, environmentally friendly, harmless to human health;
• durable in use, the service life of the material is about 50 years.

These advantages, along with excellent sound insulation properties, have made penoplex a leader in the segment of thermal insulation materials.

Expanded polystyrene insulation

Any type of material is subject to environmental influences. Products are affected by temperature fluctuations, humidity changes, sunlight, precipitation and other natural factors. Therefore, to prevent the gradual deterioration of the foam, insulation is used to protect vulnerable areas. In the case of a wooden house, the fight against humidity, which provokes putrefactive processes, is especially important.

Arrangement of the frame on the building Source ultra-term.ru

Tips for installing insulation

When insulating with Penoplex, owners first need to look at the structure of the building. For example, if it is a frame house, then it is justified to insulate all structural elements of the external and internal zones with polymer material.

For a reliable connection, slabs with a quarter groove and a ridge (tongue and groove system) around the perimeter are selected. Suitable sheet material without dents, bends or manufacturing defects.

Laying the material

In a private home, it is important not only to know how to attach polystyrene foam to a wooden wall, but also to understand the features of installation on the floor. In the latter case, the material is laid along the logs. Work begins by creating a foundation at the bottom of the structure.

Expanded polystyrene sheet on the floor Source beton-house.com

The easiest way to do this is by two methods. The first of them is to install boards under the joists, on which a layer of insulation is then laid. The second method involves installing slats on both sides of the joists, which serve as the basis for laying the material.

Laying polystyrene foam on the wall Source baurum.ru

Before installing insulation, it is necessary to lay waterproofing so that moisture from the ground or concrete does not penetrate deep into the material. This requirement is relevant even for monolithic types of foundation. After this, you can lay the polystyrene sheets themselves directly. It is best to install the slabs in layers, in a checkerboard pattern, so that the visible seams overlap.

Installation of foam plastic boards Source remoskop.ru

When placing insulation under the joists, it is necessary to leave a 2 cm gap for ventilation. If the installation was made too high, the structure will need to be raised using lathing.

Base insulation with polystyrene foam Source uteplix.com

To prevent steam from the room from penetrating the material during the heating season, a layer of vapor barrier is laid. Lastly, they begin to organize the subfloor. To do this, use a board, plywood or OSB board.

Insulation of the roof of a house Source svoidomstroim.ru

Types: how to choose insulation

By selecting a certain type of slab from the product line, you can not only insulate a wooden house with penoplex, but also properly insulate buildings and structures for a wide variety of purposes. Penoplex is available in several types, differing in alphanumeric code in the marking:

• 31 – a type resistant to low temperatures, widely used for thermal insulation of private houses, balconies and loggias, shallow/surface pipelines;
• 31 Standard – unstable to deformation and load, used for thermal insulation of swimming pools, water pipelines, heating pipelines and utility networks;
• 35 – difficult to ignite due to the fire retardant in the composition, the most popular type, used in almost all building and enclosing structures;
• 45 is a load-resistant type, indispensable for thermal insulation of floors of production workshops and warehouses, construction of roads, railways and airfields.

Penoplex is produced in the form of slabs 1.2 or 2.4 meters long, 0.6 m wide, 20–100 mm thick. In private construction, the most popular are slabs with a strength of ≤ 300 kPa.

Fastening the material to the walls

Typically, insulation is laid on the facade using frames. This technology allows you to effectively hold the material and simplifies the installation of the entire structure. The procedure is performed gradually, step by step.

Preparatory work

Attaching expanded polystyrene to a wooden wall begins with preparing a reliable base. Since wood is very sensitive to external factors, it must be protected as much as possible from damage. Both old and new buildings are periodically insulated, so you need to pay close attention to the quality of the surface. It is important to remember that before starting the main work, the wood must be dry; remaining moisture can provoke putrefactive processes and even destruction of the structure of the material.

In painted rooms, all coating should be carefully removed, and the joints between the logs should be well sealed. All procedures must be completed before the start of insulation work. Damage is also eliminated; any remaining bark is removed, if there is any on the surface.

Scheme for attaching foam plastic Source masterfasada.ru

The prepared and dried wall is treated with antiseptic solutions. Particular attention is paid to this point, since after installing the insulation, this area will become inaccessible for viewing. As a result, it will not be possible to notice the formation of mold or the appearance of insects and fungi there.

Installation of sheathing

Installing the frame allows you to securely hold the insulation in place, prevents sliding and sagging, and also allows air to freely penetrate and ventilate the walls of the house.

Application of adhesive foam for installation Source opechkah.ru

How to attach penoplex to wood

Technologically modified extruded polystyrene foam is called penoplex.

This type of thermal insulation is intended for insulating the walls of construction sites from the outside and inside, and we will consider below how to attach penoplex to the wall correctly. Penoplex boards are very durable, so the fastening must be reliable.

This insulation is also used where the wall surfaces are strongly exposed to external factors - wind, frost or heat, precipitation, etc.

Traditional technology for attaching penoplex to walls

Technical characteristics of penoplex material

Let's consider what useful qualities this extraordinary product has. Here are some features of penoplex:

• resistance to chemicals;
• reduced thermal conductivity;
• poor moisture absorption ability;
• fire resistance provided by the fire retardant included in its composition;
• the product is absolutely not susceptible to aggressive biological factors.

It is obvious that due to its beneficial properties, this insulation material is exceptional.

Features of penoplex and fastening

The moisture absorption coefficient of the material is ≤ 0.4%, which is an excellent indicator. The thermal conductivity coefficient is 0.029-0.033 W/(kg•K), that is, the material retains heat for a long time and does not allow it to pass out from insulated rooms.

These complex characteristics make it possible not to use waterproofing when attaching EPS, which reduces the cost of its use. The penoplex is attached to the concrete wall mechanically with preliminary gluing of the slabs - double fastening makes the connection strong and durable.

Surfaces on which it is recommended to attach polystyrene foam - floor, walls, ceiling, ceilings, etc.

With a wide range of slab dimensions, thinner slabs are recommended for installation of penoplex on the wall inside the building; external surfaces require thicker thermal insulation.

How to attach penoplex to concrete on the ceiling

On different surfaces from different building materials, installation of penoplex is carried out in different ways. Thus, fastening slabs to wood is carried out by gluing; fastening penoplex to a brick wall or concrete requires additional reinforcement with dowels. » alt=»»> Before you start attaching penoplex to the wall, floor or ceiling, the surface needs to be prepared:

1. Clean and dust the insulated surface before attaching the foam to the wall;
2. Soak in a solution of copper sulfate or other antiseptic substances in risk areas - corners, lower surfaces of walls near the floor - to prevent the spread of mold and fungal diseases;
3. Expand, clean and re-seal cracks and cracks on the surface;
4. Prime the surface with a deep penetration primer;
5. Apply the putty solution to uneven surfaces and prime them again after the primer has dried.

How to glue polystyrene foam to a wooden wall These rules apply to brick or concrete surfaces, but how to attach polystyrene foam insulation to wood? First, the wood is impregnated with antiseptics, then it is imperative to assemble a frame for ventilation of the space between the walls. EPS will be glued to the frame, and the air circulating between the insulation and the wall will not allow the wood to begin to rot.

Penoplex installation

Beginning of installation - mounting the starting strip on the wall. It is most convenient to use a metal perforated corner, but you can nail a regular wooden strip.

To secure the starting rail evenly, a level is beaten around the perimeter of the building, and the bar itself is secured using plastic dowel nails.

The plank will keep the polystyrene foam from sliding off the slabs, and will also give direction for laying the insulation.

The glue applied to polystyrene foam must be rolled with a needle roller to make the surface rougher. The slabs are fastened from bottom to top, shifting each subsequent horizontal row by 30 or 50%. The plates should be fixed as close to each other as possible. The gaps between the boards of glued insulation can be sealed using the same glue or filled with polyurethane foam.

Sealing gaps between foam boards

Before attaching penoplex, you need to choose a method:

Video description

How to glue foam plastic?
If you have a choice between glue and foam, then it is better to choose the first option, since the consumption of the product will be much less, and the quality of gluing will remain the same. The substance is applied between the wall and the insulation in a thin, uniform layer to securely attach the material to the surface. Before starting the procedure, it is important to thoroughly clean the area, remove traces of paint and varnish, repair potholes and damage, and dry the wood.

Applying glue to polystyrene foam Source balkon4life.ru

This method is well suited for timber buildings, but it makes no sense to use it for log buildings. This is due to the heterogeneous surface of the latter, which reduces the area of ​​contact between the material and the glue. Differences in the size and shape of the logs will make it difficult to create an even and smooth area, so the results of the work may be far from ideal.

After glue or foam is applied to the foam, sheets of material are laid evenly across the entire work area. Compared to using a frame structure, covered areas are more difficult to process and must be treated with caution in further finishing. The easiest way is to resort to plastering the surface, but this method is not very suitable for wooden houses. It would be better to build additional sheathing for the facade so that the choice of design becomes wider.

Adhesives for foam plastic in tubes Source samodelino.ru

Finishing

Using polystyrene foam allows you to create a kind of “thermos” that effectively retains heat inside the home and prevents cold from entering the building. This way you can significantly reduce heating costs and save significant money in winter.

Universal polymer glue Source samodelino.ru

After preparing the base and sheathing, a layer of insulation is laid, and then the finishing of the building begins. If you approach this process responsibly, you will eventually be able to bring almost any idea to life. The most commonly used materials are wood - lining, imitation timber or block house. Sidings are also popular. Each type of finish differs in the method and type of fastening. Usually, to equip the facade, an additional frame is used, which is installed on top of the main sheathing.

What you should know about this insulation option

Let us note right away that foam plastic is not the most popular solution for wooden buildings for a number of reasons:

Important! You should select high-quality polystyrene foam; you should not save money and purchase low-density materials, they are very fragile and can break during operation. In addition, it is advisable to use insulation with fire retardant additives in its composition; it is much more resistant to fire.

Gluing foam to a wooden surface

Before fixing the material, the surface is thoroughly cleaned and dried. To remove dust and small debris, use a sprayer and a regular brush.

Sheet of foam plastic on a wooden surface Source blog-potolok.ru

The base must be coated with a primer, and then a mesh must be glued for subsequent reinforcement. Using a stapler or adhesive, the material is securely attached to the surface.

Since the mesh is supplied in the form of rolls, before starting to work with it, it is necessary to cut identical strips approximately 40 cm wide. It must be secured in such a way that at least 10 cm is under the foam layer. After installing the insulation, the remaining sections of the product are wrapped and glued to the sheets.

Foundation insulation

First, the foundation wall is leveled if the differences in unevenness are ≥ 2.5 cm. The cement-sand mortar is applied directly to the surface or to a chain-link mesh secured with staples. Then waterproofing is carried out, bitumen mastic is applied in a layer 2–4 mm thick, and a roll of material is glued on top. Acrylic glue is applied pointwise (at 5-6 points) to the foam sheet. After this, the plate is pressed against the surface for 30 - 60 seconds. The following slabs are glued above the bottom row.

After sheathing, the seams are filled with glue, the surface is covered with fiberglass reinforcing mesh, and the foundation is plastered again.

Video description

What is the best way to glue polystyrene?
Before directly applying the glue, the surface must be treated with antifungal and antiseptic drugs. It is important to choose the right composition, since subsequently access to the junction of materials will be very difficult.

The cheapest option is dry polystyrene foam adhesive, which is made from cement. For use, this product is diluted with liquid. The result is a reliable and durable compound for attaching foam to virtually any type of material.

Also recently, solutions based on polymer cement have become increasingly widespread. They are universal in use and are well suited for gluing insulation to any type of base. To work with facades, you can use products that contain various mineral fillers. Many companies produce products to increase the protective properties of polystyrene foam. After applying glue to the front surface, the material becomes resistant to various environmental factors. In addition to the advantages, such substances also have disadvantages - a long polymerization time, which is about 3 days.

There are also aerosol mixtures containing polyurethane. They can be used as glue or to fill gaps and seams between sheets. These are universal substances that behave equally well both indoors and outdoors. They can be applied to facades, roofs and walls of houses, flooring and other wooden surfaces. In all these cases, the products set quickly and hold the material securely for a long time. And although the prices for such mixtures are relatively high, they are justified by the convenience of applying the glue.

Expanded polystyrene sheets usually begin to fix within 2 hours after gluing the surface. For better stability, the material is secured with anchor bolts for facades.

The main advantages of polyurethane products are: fire resistance, good tolerance to changes in humidity and temperature, environmental friendliness and safety for health. Modern production technologies make it possible to obtain high-quality and easy-to-use compositions. When choosing an adhesive, it is important to consider its chemical reactions with the material. To prevent the destruction of polystyrene foam, you need to purchase products that do not contain acetone or gasoline.

Sometimes sheets of expanded polystyrene need to be glued together. For these purposes, use any wet or dry glue that does not contain solvents. When choosing products, a specific task is taken into account, and then the most suitable product is selected to solve it.

Manufacturers and reviews

The modern building materials market offers a variety of adhesive compositions for penoplex. We invite you to familiarize yourself with the most popular and high-quality products from different manufacturers.

Tytan

The Polish company Selena quickly gained popularity in our market. And all thanks to the high quality of products and loyal pricing policy. Almost the entire range of products is presented in the form of adhesives and sealants, one of which is the Tytan universal adhesive.

, which is resistant to precipitation, temperature changes, and moisture, is most suitable for working with penoplex This glue does not require shrinkage and ensures a tight fit of the material to the surface.

Cerisit

The popular company Cerisit, known as one of the best manufacturers of building materials, offers a whole line for working with penoplex.

Experienced specialists select high-quality compounds.

• Cerisit ST84 is a special foam for penoplex used in facade cladding. Tolerates high and low temperatures well (from -10°C to +40°C). It is characterized by fast drying - in the warm season, the composition hardens within 2-3 hours. The work can be carried out using a mounting gun. This composition is loved by consumers for its harmonious ratio of affordable cost and excellent quality.
• Cerisit ST83 is a dry mixture for laying slabs. The drying time is much longer than the previous material - three whole days at above-zero temperatures. The composition is applied using a notched trowel. The approximate consumption of the mixture is 6 kg per m2. The only negative is that the material does not tolerate cold well, so if the temperature is below zero, work cannot be carried out.
• Cerisit CT85 is a reinforcing adhesive used for gluing and subsequent reinforcement of tile material. The product can only be used at positive temperatures – from +5 to +30°C. The mixture must be used within two hours after mixing. Approximate mixture consumption: 6 kg/m2 – when gluing; 5 kg/m2 – with reinforcement.

Fastening foam with dowels

For external finishing of facades, sheets of expanded polystyrene are used, which are attached to the frame using disc dowels. These elements are considered mandatory for reliable fixation of the material. The parts act as insurance in case the slabs sag, so that they cannot slide and peel off from the wall. Dowels are placed according to certain patterns, which are selected for each specific building.

Most of the elements will be needed to fix the material on the plaster. For solid foundations, 2 to 5 dowels per square meter of area will be sufficient. To calculate the appropriate length of fasteners, it is necessary to measure the thickness of the plaster layer. The size of the element must extend through the entire layer and be fixed at the base of the wall.

The foam is secured using dowels as follows:

• Fixation is carried out 4 hours after applying the glue, so that it has time to set well and is not damaged during installation of fasteners.
• Surface drilling is performed with high precision, having previously installed a special limiter in the hammer drill, which does not allow penetration beyond the size of the fastener.
• A disc-shaped dowel is placed in the completed opening. Inside the element there is a plastic core, which is designed to open it in the hole.
• Drive the fasteners very carefully so as not to deform the surface of the insulation. Otherwise, its characteristics will suffer, the foam will be less effective at retaining heat inside the building. If you have difficulty placing the core, you will need to replace the drill with a new one.

Features of internal fastening

Experts pay attention to the following factors:

• internal insulation with foam boards is carried out only if there is no opportunity to do work from the inside;
• Insulation can be done in a house only after final shrinkage, as practice shows - after a year.
• the thickness of the penoplex should not exceed 30 mm, and its density should be as low as possible to avoid the formation of condensation on the wall;
• It is necessary to attach a foil film to the insulation to prevent the appearance of dampness and deterioration of the microclimate. The algorithm of actions generally remains the same as for the exterior decoration of a house, taking into account the stated factors.

Fixing polystyrene foam to a wooden ceiling

Before starting the main work, the ceiling must be carefully prepared, whitewash, dust and debris must be removed from it. You should also immediately place the electrical wiring, which will then be covered with plates.

The sheathing for insulation is made from wooden blocks. They are laid at such a distance from each other that the sheets of material are tightly located between them. Then the foam itself is mounted, and adhesives or fasteners are used to secure it. The cracks and recesses are filled with sealant. You can also use polyurethane foam for this purpose.

Next, a vapor barrier is placed on the frame. This is a film that will prevent moisture from entering the ceiling from inside the room. Lastly, the foam boards themselves are laid.

During preparatory work, the ceiling should not only be thoroughly cleaned, but also its surface should be disinfected using antiseptics. Then the entire area is covered with primer. If it is impossible to remove all the whitewash, it is recommended to completely treat the ceiling with special glue. The product is applied to the material with a dotted line. The sheets begin to be placed from the middle, moving them slightly. For greater reliability, it is advisable to add fasteners. Expanded polystyrene is also strengthened using a reinforcing mesh, which is subsequently puttied and processed.

General information

Insulating wooden buildings with penoplex is not recommended, since wood is a natural, “living” material that requires constant air circulation. Without the ability to “breathe,” the wood will fog up and in the future this will lead to rotting. We recommend that you use suitable materials for insulating wooden walls, for example, mineral wool.

How to prepare the wall surface?

Initially, it is necessary to clean the wall surface from all kinds of dirt, stains and dust. If the wall surface is not perfectly flat, you need to try and use putty to bring it to such a state.

Please note that the use of putty is suitable for leveling concrete and brick surfaces, but not for wooden and plaster surfaces - here you will have to use sandpaper or brushes of the required hardness. The work of leveling the walls is quite painstaking and dirty, but without this step you cannot proceed with the installation of penoplex.

After you have completed the leveling work

The walls need to be primed. The most suitable choice would be a deep penetration primer. The assortment of construction stores offers many brands for the buyer to choose from. The next stage of preparation will be the location of the guide for attaching the penoplex - the starting base strip. The plank can be either wooden or metal. Its purpose is to help fasten the penoplex plates as quickly and conveniently as possible, without allowing the plates to move or be positioned unevenly.