Insulation with foam plastic under drywall. We install insulation under drywall without the help of hired specialists

It is not easy to make thermal insulation of a multi-storey building; special equipment is required. But insulating the walls inside with mineral wool or plasterboard gives a good effect. With proper installation, heat loss is reduced by 20-30%. The main thing is that the thermal insulation layer in the room corresponds to the technology. We will tell you in this article how to properly insulate walls from the inside of a living room with plasterboard.

Types of drywall and its use

Drywall can be used to insulate walls inside a building. Use either moisture resistant or wall.

Moisture-resistant can be used in dachas or for rooms with a high degree of humidity: bathrooms and kitchens.

Important! Moisture-resistant plasterboard, the best solution for rooms where heating is not provided.

This material is not at risk of cyclical temperature fluctuations. After installing the sheets, you only need to apply a waterproof primer or protective paint to the front part. You should also treat drywall with an antiseptic to kill harmful germs and bacteria.

Wall types are suitable for living rooms where the humidity is no more than 70%. Sheets are marked in blue on a gray surface.

As for the sizes of sheets, it is best to purchase products 2.5-3 meters long and 1.2 meters wide. In terms of thickness, canvases of 12.5 mm are perfect (9.5 mm is the ceiling type).

• ordinary;
• moisture resistant;
• moisture and windproof;
• enhanced strength;
• fire resistant.

Frame insulation method

There are 3 methods of insulation:

1. Glue method. The sheets are attached directly to the wall using gypsum or polymer-cement glue. With this finishing, the area of ​​the room does not become smaller. The only disadvantage of this method is that it is impossible to lay thermal insulation, and the walls must be strong.
2. Frame method with thermal insulator.
3. Frame method without insulation.

The last two methods of installing drywall are used most often. In order not only to insulate the room, but also to achieve good sound insulation performance, you will need to use profiles. The only drawback is that the room is significantly reduced in size.

Types of insulation

It is better to insulate the surface under drywall using mineral wool or polystyrene foam. You can also use isolon or penoplex. These insulators differ in installation methods, cost, and strength.

According to research, polystyrene foam, like polystyrene, is harmful to health. It is rarely used in residential premises. Another disadvantage is that some types of foam are eaten by rodents. But it has a low cost and is also available in many densities and sizes.

Example of insulation with plasterboard and mineral wool

As for mineral wool, the advantages include low weight (especially important for insulating old buildings), as well as low thermal conductivity. There is only one significant disadvantage of mineral wool - hygroscopicity. Therefore, when thermally insulating partitions and walls, it is necessary to prevent the accumulation of condensation. For this purpose, vapor insulation should be used.

There are several types of mineral wool. They all differ in the production method, composition and technical indicators. Among the types of wool that are on the market, the most popular is fiberglass-based basalt wool. Like other types of insulation, they have both advantages and disadvantages.

The main negative aspects of glass wool:

1. The thermal conductivity indicator is greater than that of stone, and therefore heat disappears faster.
2. At elevated temperatures it forms a solid glass mass.
3. Inconvenient to work with (glass wool fibers can cause itching; requires the use of protective glasses, gloves, a respirator, and wearing a thick suit).

Important! For greater efficiency, it is necessary to lay mineral wool in 2-3 layers.

Despite their external similarity, basalt and glass wool are significantly different. Glass wool is made from very thin glass fibers, and basalt wool is made from volcanic rock. They also differ in the indicator of thermal conductivity, which is lower in basalt, and, therefore, it retains heat better.

Cost of materials for insulation:

1. The cheapest way would be to insulate the walls of the house with polystyrene foam, the price of which ranges from 70-90 rubles. for 1 sq. m.
2. As for mineral wool, it costs a little more - 90-150 rubles. The price of the material depends on its density, thickness and manufacturer.
3. Penoplex, which is extruded foam plastic, but with increased strength and density, costs 1 sq. meter approximately 200 rubles.

Isolon (foamed polyethylene) can also serve as an insulator. Its cost will be 280-300 rubles per 1 square meter.

Stages of thermal insulation of a wall

In order for the work process to proceed quickly and properly, you should prepare the necessary tools. This will significantly speed up the work on protecting the walls with insulation.

The following materials will be required:

• plasterboard sheets;
• self-adhesive tape;
• insulation;
• membrane to ensure maximum vapor barrier;
• screws, nails;
• hammer, screwdriver, hacksaw;
• yardstick;
• metal profiles or wooden slats for constructing the frame;
• fastening materials.

For 1 sheet you need approximately 30 pieces of self-tapping screws. It is best to buy screws 20 mm long.

As for the manufacture of the frame, the profile must be taken of 2 types: marked CD and UD. The length is selected based on the size of the room.

Frame design

It consists of drawing the perimeter and thinking through how the frame will be positioned on the wall. A simple pencil and a building level are enough.

Advice! For the best insulator effect, the structure must be positioned 3-10 cm from the wall.

• surface cleaning;
• smooth out all the unevenness and fill up the cracks and depressions;
• drying with a heater or blow dryer;
• getting rid of mold and mildew.

Sometimes it is necessary to treat the walls with a special waterproofing putty to prevent the occurrence of dampness. First, the layer is applied vertically, then horizontally.

Frame construction

According to pre-made marks, you need to mount the frame. To avoid contact of the metal structure with the wall, a tape prepared in advance is glued to the base of the profile. The frame parts are fastened to the wall using self-tapping screws and dowels.

Before laying the insulator, the surface is prepared in advance. Weak areas of plaster are removed or restored. To eliminate the possibility of the formation of fungus and mold, it is necessary to treat with a primer and an antiseptic.

Sheets of plasterboard are installed on a frame made of metal or wood. A metal frame will last significantly longer than one made of timber.

In the area where batteries are located, where installing thermal insulation is difficult, penofol can be used.

You can make a frame from bars under drywall

Assembling the frame begins with the installation of guides created from the UD profile. The slats are mounted on the ceiling and floor with a distance of 50-60 mm from the walls. A section of the rack profile is inserted into the guides. The ends are fixed using small self-tapping screws (“fleas”). The edges of the hangers are folded from the sides and connected to the slats. The pitch between the profiles must be observed so that there are 3-4 slats per sheet.

Important! When the frame is constructed, they begin to lay the insulator.

To improve the rigidity of the structure, it is necessary to make transverse bridges from the CD profile. The profile is cut so that its length overlaps the adjacent slats by half. Use metal scissors to cut off the shelves. Then the blanks are fixed with fleas onto the frame.

Vapor barrier device

Penofol is often used as a vapor barrier. Before attaching it, you need to make sure that the side of the material with foil is facing inside the room.

As for the vapor barrier material, which has a rough surface, its uneven side should also be directed into the room.

The insulation should be cut into pieces, the size of which should match the parameters of the frame cells.

If you use foam plastic as a thermal insulation material, then it should be attached with special glue prepared with the addition of water. Each piece should fit tightly to the surface. If gaps appear between the parts, they are filled with polyurethane foam. After the glue has dried, the foam is fixed with dowel umbrellas. Dowels should be placed in the corners of the sheet and one in the center.

Important! If there is almost no space between the metal frame and the wall (3 mm), then it is advisable to use mineral wool. To do this, you will first need to delaminate it.

After laying the internal thermal insulation, they begin to sheathe the frame with sheets of plasterboard.

When the screw is screwed in, its head should sink slightly, by 1-1.5 mm, but without tearing the cardboard. To make fixing easier, it is better to buy bits with a limiter.

After the walls are completely covered with plasterboard sheets, the surface is finished in any usual way. Insulated walls can also be covered with wallpaper or painted.

Insulation of balcony walls

As for the insulation of balconies and loggias, such structures require compliance with certain rules.

The material for thermal insulation must be:

• waterproof (since there is a high probability of water appearing on the balcony);

• you need to buy only moisture-resistant drywall;
• walls should be treated with an antiseptic.

To insulate balconies, a frameless method is often used. This is due to the fact that such a space has a small area. The insulator creates a higher degree of structural reliability, despite various influences: tension, humidity and other loads.

Initially, the walls are prepared for fastening the sheets. All fragile areas are restored, and the surface is treated with an antiseptic substance.

As soon as the walls are prepared, the installation of sheets begins. Initially, they need to be cut into the necessary pieces. It is not recommended to cut sheets right away; it is better to do this as you work.

Once the material is prepared, you can begin fixing it. This should be done using an adhesive composition. This is the easiest way to attach gypsum boards. When carrying out such work, you need to ensure that the layer of the mixture is the same everywhere.

Thermal insulation allows you to protect the house from dampness, drafts and provide a favorable and comfortable microclimate. After all, with insulation, like a shield, you can isolate yourself from the harmful influence of the environment.

Source: znatoktepla.ru

The effectiveness of insulating the walls of a house or apartment indoors: how to sheathe the inside with insulation under drywall?

To create comfortable indoor conditions, it is important not only to choose a suitable heating system, but also to properly insulate the walls. Then the room will remain warm, which will allow you to maintain a favorable microclimate and save on energy resources for heating.

How to properly insulate walls inside under drywall

More often, walls are insulated using plasterboard because:

• this material has a thermal conductivity 10 times lower than that of reinforced concrete - therefore, even just pasted on the wall, it gives a noticeable thermal insulation effect;
• since its gluing requires smooth surfaces, if there are defects on them, the sheets have to be mounted on special frames, which creates an air gap between the drywall and the wall - this also helps retain heat in the room;
• The space between the drywall and the wall is used more efficiently if thermal insulation materials are laid between them, which will greatly increase the possibility of retaining heat in the house;
• in summer, such thermal insulation will not let heat into the room from heated walls;
• the ideal geometry of the material allows, simultaneously with improving the microclimate, to perform another task - to level the surface of the walls, hide defects and communication installations.

When is it necessary to insulate indoor walls?

The most effective option for wall insulation is installing thermal insulation on the outside of the façade. But only owners of private houses can afford this. This method is also expensive.

In apartment buildings, if they are not insulated from the outside with thermal insulation materials, residents have only one choice for insulating the walls themselves - internal thermal insulation. Private homeowners also often choose this option as an economical one.

They prefer to use plasterboard for wall cladding because it has a number of advantages over other finishing materials:

• lightweight and easy to handle;
• has thermal insulation properties;
• allows you to quickly create perfectly smooth surfaces;
• under such a coating you can place any type of insulation, even soft ones;
• its cost is not high.

What materials can be used inside for insulation under gypsum boards?

First you need to choose the right brand of drywall, because not all are suitable for this purpose.

Drywall is:

• wall;
• ceiling;
• fire resistant;
• moisture resistant;
• reinforced gypsum fiber;
• moisture-resistant gypsum fiber.

Moisture-resistant, high-strength, fire-resistant grades of plasterboard are suitable for wall insulation. Purchasing products from well-known manufacturers is a guarantee of the quality of materials.

The thermal insulation properties of the walls and material costs depend on the choice of insulation. Insulating products are used in different densities, thicknesses, hard and soft, and have different thermal conductivity values.

List of the best materials

To insulate walls under plasterboard, the following insulation materials are used:

They differ in technical characteristics and cost. Therefore, it is important to decide in advance which material is more suitable.

Granular material based on polystyrene. It has low density and light weight. Available in slabs of different thicknesses. It is often used due to its low cost, ease of installation, and can be purchased at any hardware store. The disadvantages include:

• low noise insulation;
• the material does not “breathe” (additional ventilation is needed);
• due to fragility, it is easily damaged;
• Rodents love it (due to the holes that appear, warm air will escape and you will have to dismantle the casing and replace the insulation).

Glass wool

A soft, flexible material, relatively thin (less “eats up” space), has low thermal conductivity, and is attractively cheap. But it is very specific and can cause harm to health during installation.

Glass fibers, when they get on the skin and mucous membranes, cause itching and burning. Therefore, installation work must be carried out in special clothing, a respirator, gloves, and safety glasses. Because of these inconveniences, glass wool is in little demand.

A new type of insulation obtained by foaming polyethylene with propane. It is light in weight and low in density due to the air bubbles in its composition. It retains heat well, has high sound insulation and at the same time has a small thickness, allowing you to save useful space in the room. Some of its brands are produced with a vapor barrier layer made of foil. If it is not there, then you can attach regular construction foil using glue.

Basalt wool

More expensive than foam and glass wool, but has many advantages. Made from natural materials - molten rocks. It is environmentally friendly, hypoallergenic, durable, and fire resistant. It consists of many thin stone fibers, between which layers of air create an excellent heat insulator. Unlike other types of mineral wool, basalt wool does not absorb moisture, completely retaining its thermal insulation properties in conditions of high humidity. The only disadvantages are the high cost and large thickness of the slabs.

How to sheathe insulation under gypsum boards inside a house with your own hands

Internal insulation of walls under drywall can be done independently. It is only important to carry out all stages of work correctly, follow technologies and recommendations.

1. Preparing the walls. To avoid having to quickly dismantle the drywall and re-do the repairs, you need to take care in advance that the walls are dry, clean, free of fungal areas, cracks and holes. If there are even small spots of mold, they must be completely removed, and then the walls must be treated with a special antiseptic, antifungal composition. All cracks and crevices must be filled with putty to avoid heat leakage and moisture penetration from the outside. The applied layer of plaster will be an additional protection against dampness, but an antiseptic must also be used. Because in the future, insufficient ventilation under the insulation layer, in the absence of a protective coating, can cause the formation of mold.
2. Fastening the sheathing. To create fastenings for drywall, a sheathing is made of metal profiles or wooden slats. The advantages of a metal profile are that it does not deform over time. Wooden slats have good thermal insulation properties, but are susceptible to drying out, which can affect the quality of the cladding. To create the sheathing, metal or wooden slats are fastened with flat cutters along the perimeter of the wall, and then vertical slats are installed at a distance of about 60 cm (you need to take into account the width of the insulation boards so that it fits tightly into the space between the slats).
3. Installation of insulation. Methods of attaching insulation depend on the type of material. Foam boards are attached to the wall with glue and special dowels. All joints between them are additionally sealed with construction tape, and the gaps between the slabs and the ceiling (floor) are sealed with silicone sealant. Mineral wool is attached with a special foam adhesive, which is applied around the perimeter of the slab and a couple of strips in the middle.
4. Finishing the insulation surface. To ensure good vapor barrier, it is necessary to apply a protective layer of construction foil or plastic film on top of the insulation. Only after this can finishing be done with plasterboard.
5. Installation of drywall. Drywall sheets are attached to the sheathing with self-tapping screws. Then all the cracks are puttied, cleaned with emery cloth, and covered with a special tape or paint compound to prevent cracking at the seams.

How long will the insulation last?

The service life of insulation depends on its type. Cheap materials are on average suitable for use for 20-30 years. Some expensive brands have a service life of up to 50 years in their technical specifications (but this is not always tested in practice).

Over time, the substance ages, the structure of the material is destroyed, it dries out or cakes, and loses more than 1/3 of its thermal insulation properties. Most types of insulation are recommended to be replaced at least every 35 years.

To create a healthy, favorable microclimate in the house, you can independently carry out the work of insulating the internal walls. For this purpose, lightweight, easy-to-install materials are used. With their help, you can make high-quality wall repairs with your own hands, even without professional training, using tools available in everyday life.

Useful video

Source: otdelkasten.com

What insulation to use under drywall: comparison of materials

By laying insulation under the drywall, you can solve two problems at once - creating an optimal thermal insulation cake and improving the geometry of the walls. Sheathing sheets initially have low thermal conductivity, but if they are supplemented with protective materials, heat leakage can be effectively prevented.

Features of thermal insulation with plasterboard

Advantages of gypsum board cladding in terms of wall insulation in an apartment:

• low conductivity of panels;
• installation is carried out only on flat surfaces, most often the sheets are installed on the sheathing - such a frame forms an air gap between the wall and the sheathing, which has a positive effect on retaining heat in the room;
• free space (cells in the sheathing) can be filled with materials with a high ability to retain thermal energy;
• In summer, such rooms will be cooler due to the fact that additional layers will not allow heat from outside.

Installation of insulation under drywall is carried out only on flat surfaces

In apartment buildings, internal insulation is more affordable than external insulation; drywall is one of the most economical options. The panels are easy to process and undemanding in maintenance, they can be applied with any type of finishing, they form a perfectly flat surface without weighing down the load-bearing structures. GCRs are combined with most types of insulating (hard, soft) and finishing materials, which is important when creating interior design.

Types of suitable insulation materials, their properties

The insulating structure is selected in accordance with the brand of plasterboard panels, they can be:

• wall,
• fire resistant
• gypsum fiber reinforced,
• ceiling,
• moisture resistant,
• gypsum fiber moisture resistant.

To insulate partitions and load-bearing structures, moisture-resistant wall variations that are fire-resistant and have increased strength are used. Additional insulators vary in density, consistency, thermal conductivity, and thickness.

Slab materials are optimal for walls; compared to roll insulation, they are much easier to install. The parameters of the products are suitable for placement in the grooves of the sheathing; you don’t have to waste time on adjustment. It is only important that the slabs are positioned closely, without gaps. Glass wool, basalt wool, polystyrene foam, and isolon can be mounted on walls under drywall.

The granular substance is based on polystyrene, is characterized by low weight and low density, and is molded into slabs of varying thickness. The popularity of the solution is due to ease of installation and low cost; the disadvantages are fragility and insufficient sound insulation, and the need for additional ventilation. Rodents are interested in the material; additional protective measures will be needed.

Foam plastic - insulation for drywall

Basalt wool is more expensive than glass wool and polystyrene foam, but it is in great demand due to its optimal performance properties. The natural insulating resource is made from molten rocks and is characterized by being hypoallergenic, fire-resistant, environmentally friendly and durable. The texture is formed from thin stone fibers alternating with layers of air, which ensures thermal insulation.

Unlike other categories of mineral wool, basalt does not absorb water, so it can be used in rooms with high humidity. In addition to the price, the disadvantage is the large thickness of the slabs, which “eats up” useful space.

Glass wool

A flexible, soft solution with a small thickness, kept in the budget segment, and has low thermal conductivity. This option is dangerous for use in everyday life, since glass fibers upon contact with mucous membranes and skin provoke severe burning and itching. During installation, you need to use a respirator, special clothing, safety glasses, and gloves.

Glass wool - insulation for drywall

One of the new insulation options, formed as a result of polyethylene foaming under the influence of propane. It is characterized by low density and weight, as it is saturated with air bubbles. Izolon perfectly protects against heat leaks, exhibits high sound insulation with an acceptable thickness, and with its help you can save the usable area of ​​​​the apartment. Some brands have foil vapor protection.

Which way to choose - from the inside or the outside?

If the thermal insulation material is placed outside, that is, the facade of the house is directly insulated, the dew point (condensation forms along this boundary during temperature changes) falls precisely on the additional layer. In this way, the impact of temperature changes and changes in air humidity on the load-bearing wall is neutralized, resulting in an extended service life of the building.

If insulation is carried out from the inside using mineral wool covered with gypsum board or similar cladding, the dew point moves. Usually this boundary is between the wall and the insulation, in such conditions there is a high risk of fungi and mold growing. If internal thermal insulation of partitions and walls in an apartment is carried out, two conditions must be taken into account - the presence of a protective layer on the side of the facade and the total thickness of the wall. The best option is to strengthen the load-bearing structures on both sides.

Technology for installing insulators under drywall

As a result of preliminary preparation of the walls, clean, dry surfaces should be formed, free from any unevenness in the form of holes, cracks and fungal infection. Pockets of mold are cleaned and treated with an antiseptic, and the defects are carefully puttied.

The blanks are fixed with flat cutters at the boundaries of the wall, then vertical slats are mounted in increments of 60 cm (the insulation must fit tightly into the resulting grooves).

The method of fixing the material depends on its essence. Foam boards are installed using special dowels and glue, the joints are additionally reinforced with construction tape, and the cracks in the area where they meet horizontal surfaces must be filled with silicone sealant. To fix the mineral wool, you will need foam glue: it is distributed around the perimeter of the slab and applied a little in the center.

The vapor barrier layer can be formed from dense polyethylene film or construction foil. Next, they begin covering the cake with plasterboard using self-tapping screws. The cracks are filled with putty, cleaned to prevent cracking of the putty, and the top is covered with paint or special tape. If the base was laid with a metal profile lathing, in order to prevent the occurrence of cold bridges, tapes from the main heat insulator must be placed in its cavity.

The service life of the solution considered is determined by the type of insulation used. On average, it varies between 20-30 years. As the material ages, it loses a third of its beneficial properties due to caking and drying out, so it should be promptly replaced with a new one.

Source: pechiexpert.ru

Step-by-step instructions for insulating wooden and brick walls from the inside with mineral wool plus plasterboard

Wall insulation is a necessary procedure aimed at maintaining heat in the house for comfortable living.

It has been proven that in the cold season, about 30% of all heat loss occurs due to uninsulated or improperly insulated walls.

No matter how powerful and modern the heating system is, without proper insulation of the walls, the effect of its use will be minimal.

There are two ways to insulate a house - outside and inside.

Internal insulation is applicable in cases where it is necessary to preserve the original appearance of the building (for example, an apartment in a high-rise building, or a unique facade of a house). One of the most effective materials for insulation is mineral wool.

If for some reason mineral wool is not suitable for you, you can choose insulation from these materials:

Features of internal insulation

Unfortunately, internal insulation is not as effective as external insulation of premises, but with the right approach it can be a good way out of the situation. The main problem with this method is that the load-bearing wall itself, bordering the street, does not become warmer.

At the same time, despite its disadvantages, insulating walls from the inside also has its positive aspects:

• such work can be done with your own hands;
• insulation of internal walls with mineral wool can be done at any time and in any weather;
• there is no need to complete all the work at once - it can be done gradually;
• Insulation with such a device plays the role of sound insulation and prevents extraneous street sounds from entering the home.

Pros and cons of insulation methods

Mineral wool

Mineral wool as a building material used for insulation, has been known for a long time.

Made from natural basalt fibers, it is environmentally friendly and retains heat well inside a wooden or brick house.

There are 3 main types of mineral wool, depending on the intended use:

• lungs. Used in frame insulation. Their density ranges from 10 to 90 kg/m3;
• heavy. This type of wool is used to insulate building facades. Its density is 90 kg/m3;
• technical. They are used mainly for insulating industrial premises and equipment where high and low temperatures are observed.

Mineral wool also comes in several types according to its composition:

• glass wool- produced by melting quartz sand or broken glass into thin fibers. When adding binders, it acquires the usual yellowish color. This material does not burn and does not change its properties when it gets wet;
• slag- made from industrial slag waste. The use of such wool when insulating residential premises is unsafe from an environmental point of view;
• basalt wool- the most common material for insulating houses. It has an increased thermal conductivity coefficient.
• stone wool- one of the most technologically advanced options. It is practically free of disadvantages and is often used in construction, namely this option is recommended with internal insulation.

Comparative characteristics of insulation materials

Advantages and disadvantages of mineral wool

The spread of mineral wool is primarily due to its advantages:

• low thermal conductivity;
• non-flammability;
• mechanical stability - does not change its properties when exposed to it;
• soundproofing characteristics;
• resistance to temperature deformation;
• biochemical resistance;
• convenience and ease of installation.

However, despite the impressive list of advantages, building regulations do not recommend the use of ordinary mineral wool for insulation of premises. This is caused by the presence of phenol in its composition, which has a detrimental effect on human health. For internal insulation, craftsmen advise using ecowool or stone wool.

If installed incorrectly, exposed areas of mineral wool come into contact with the ventilation system, resulting in hazardous particles being released into the surrounding air.

Drywall

Today it is difficult to imagine renovation without the use of drywall. It is multifunctional and is used for finishing walls, ceilings, creating partitions, and various decorative elements.

Some types, due to their water-repellent properties, are used in finishing bathrooms and toilets.

Before using drywall, you need to understand its positive and negative characteristics in order to understand the specifics of handling it.

Advantages of drywall:

• Flexibility and lightness. The use of this material allows you to implement the most daring design solutions. It is easy to make various geometric shapes from it - from banal rectangular to complex semicircles, arches, columns;
• Thermal insulation properties;
• Fire resistance. Drywall doesn't burn. When it is exposed to fire, only the top paper layer suffers.
• Water resistance. Special types of gypsum boards have been developed that are recommended for use in rooms with high humidity.

Disadvantages of drywall:

• The main disadvantage is its fragility. A sheet of drywall can easily be damaged during transportation, installation, and subsequent operation;
• Soundproofing characteristics. Drywall does not have soundproofing properties. Behind a simple gypsum board partition all sounds will be heard.

Construction of a wall pie from the inside

In construction, the totality of all structural elements is usually called a pie. In relation to internally insulated walls, The construction pie looks like this:

• external load-bearing wall;
• waterproofing;
• insulation layer - mineral wool;
• vapor barrier membrane;
• drywall frame;
• finishing plasterboard sheets;
• finishing finishing material.

Vapor barrier - description and installation

An important step in the process of internal wall insulation with mineral wool is the installation of a vapor barrier. During the operation of a residential building, steam is constantly released during cooking, using the bathroom, and using the kettle.

In this case, steam easily penetrates through the layer of drywall into the insulated partition. If the surface of the mineral wool is not covered with a vapor barrier membrane, you may encounter the fact that the insulation, which has absorbed a large amount of moisture, will become a constant source of dampness and mold.

The vapor barrier is installed on top of the frame with a layer of insulation. There are 2 types of material designed to create a vapor barrier under drywall, the first of them is polyethylene film. It is the most budget option. However, in addition to retaining steam, it does not allow air to penetrate into the partition space, which is fraught with the formation of a greenhouse effect and eventual dampening of the drywall.

Membrane film is an innovative material in this regard. This film easily retains moisture, but does not interfere with air ventilation. The membrane film “works” only in one direction. This is important to consider when installing it.

The film covers the entire surface of the finished partition. The canvases should be laid overlapping, the joints should be taped with mounting tape.

Lathing under mineral wool and drywall - features and installation

Traditionally, create a partition sheathing for fastening Drywall can be made from two materials:

• wooden slats;
• galvanized profile.

The wooden frame is distinguished by its massive, bulky design. Before installation, wooden slats are treated with an antiseptic to prevent the possibility of rotting.

When installing drywall, it is more advisable to use special galvanized profiles.

They are designed to be attached to each other, in addition, they are provided with mechanisms for attaching to walls - brackets, with which you can adjust the thickness of the partition.

A brief diagram of the installation of lathing for gypsum boards can be presented as follows:

1. The thickness of the partition is determined depending on the selected thickness of the insulation;
2. a guide profile is attached to the sides of the vertical adjacent walls, along the floor and ceiling;
3. the edge from which the plasterboard sheets will be installed is determined;
4. Considering the width of the sheets is 120 cm, markings are made every 40 (or 60) centimeters;
5. U-shaped brackets are attached along the markings at intervals of 50 cm;
6. the supporting posts are inserted into the guide profile in accordance with the markings;
7. using a stretched string, level the supporting posts and secure them with brackets;
8. Transverse posts are attached to the load-bearing posts to ensure structural rigidity;

Mineral wool lathing

Insulation is laid under the resulting plane.

Insulation of walls from the inside with mineral wool plus plasterboard

All irregularities and depressions must be plastered and filled. Walls that are to be insulated are treated with anti-mold preparations and primed.

Insulating a brick wall from the inside with mineral wool:

1. Using the method discussed above, a sheathing is created in addition to securing the load-bearing posts;
2. insulation is being prepared. The method of its fastening depends on what kind of mineral wool you are dealing with.. It is convenient to string cotton wool in the form of mats onto brackets installed in the wall. Laying should be carried out so that there are no gaps between the mats. ;
3. after filling the walls with insulation, load-bearing racks are installed;
4. If mineral wool is purchased in rolls, its installation can be done after installing the racks. It is easy to fill the space between the racks and the wall;
5. the surface of the insulation and sheathing is covered with overlapping rolls of vapor barrier membrane. Membrane joints are glued with mounting or plumbing tape.

This way there is a prepared surface for mounting plasterboard sheets.

Waterproofing

The need for waterproofing arises in wooden houses with log walls with cracks and cracks. In order to prevent contact of street air with the insulation layer, wooden walls are covered with a layer of hydro- and windproof membrane.

This film reliably protects the insulation layer from moisture from the street. It is attached using a stapler and overlapping staples, the joints are glued.

Installation of drywall sheets

The installation diagram for drywall is simple:

• The sheets are fastened to the frame using metal screws. The standard length of gypsum board is 250 cm. If the height of the room is greater, a piece of the required size is cut from a new sheet. In this case, the installation of the sheets is carried out staggered - so that the position of the segments alternates.
• If necessary, a second layer of plasterboard is installed.
• The drywall is being cleaned.

Useful video

Laying mineral wool under drywall in the video instructions below (don’t forget about steam and waterproofing):

Conclusion

Despite the skeptical attitude of the majority towards internal insulation, it is reliable, effective and convenient. It is widely used in apartments and offices. The main thing is to select high-quality materials and follow building codes and regulations.

September 2, 2016
Specialization: master of interior and exterior finishing (plaster, putty, tiles, drywall, lining, laminate, etc.). In addition, plumbing, heating, electrical, conventional cladding and balcony extensions. That is, the renovation of an apartment or house was done on a turnkey basis with all the necessary types of work.

In fact, the technology of insulating walls with plasterboard from the inside largely depends on the wall itself, that is, on its thickness and the presence of insulation from the street. However, the installation technique itself does not depend on these parameters and remains unchanged, so I want to fix the main direction precisely on the technical conditions.

I will tell you about three possible and simple methods, materials and show a video in this article.

Insulation under gypsum plasterboard

A few words about drywall: it can be wall (GKLS), ceiling (GKLP), moisture-resistant (GKLV) and fire-resistant (GKLO). In addition, there are also reinforced gypsum fiber sheets (GKL) and gypsum fiber moisture-resistant sheets (GVLV).

About materials and efficiency

By and large, two insulation materials are used for gypsum plasterboards: polystyrene foam and mineral wool:

• foam plastic is a material made by filling plastic with gas and in this case, these are panels 1000×1000 mm and thicknesses of 20 mm, 30 mm, 40 mm, 50 mm and 100 mm;
• there are two types of density, which is used in domestic and most industrial premises - these are 15kg/m3 and 25kg/m3 (its price is higher);
• So, in terms of thermal conductivity there is little difference, but this is very clearly visible during installation - the fifteenth sheets crumble heavily when cutting, crumbling into granules, while the twenty-fifths behave quite decently;
• the thickness is selected depending on the need in a particular case.

Mineral wool comes in different forms:

• such a general concept as mineral wool can imply three types of material, that is, made from different melts - GOST 31913-2011 (EN ISO 9229:2007);
• there is glass wool, which is made from molten glass waste, quartz sand and other materials that are used to make glass;
• there is slag wool - such a product is made from melts of blast furnace slag, which, naturally, remains in the metallurgical industry;
• there is stone wool - it is made from molten basalt (this is volcanic lava) and the product itself has a gray-yellow color;
• in addition, any mineral wool can be foil-coated on one side, and also produced in rolls or in blocks (panels).

For external insulation, as well as for insulating rooms with high humidity, it is best to use basalt wool. Glass wool is dangerous for the respiratory tract, therefore. It is inconvenient for installation, and the slag wool contains iron particles - they rust and the material sags, losing its properties.

Outside or inside

Pay attention to the diagram shown at the top - here the insulation is installed outside, and the dew point (formation of condensation due to temperature changes) falls on the insulation layer. That is, the load-bearing wall is protected from the influence of temperature changes and air humidity, which helps to increase the service life of the building.

If the walls are insulated from the inside with mineral slab plus plasterboard or other cladding, the dew point moves. And it, as a rule, ends up between the insulation and the wall.

That is, you get a problem - fungal mold under the insulation. Therefore, when insulating internally, you should pay attention to two factors - the thickness of the wall or the presence of insulation outside. As you understand, the best option is when the wall is insulated on both sides, or when it has sufficient thickness.

Installation: 1 way

Mineral wool or polystyrene foam can be installed between the profiles, and it does not matter what they are made of - metal or wood. Typically, foam panels are used for this, but mineral wool blocks can also be used.

The most important thing is that these panels fit tightly to the profiles. That is, in essence, this is their fixation. If it is mineral wool, where the panel does not have rigidity, then in this case fungi dowels are used, which press the material to the rough surface.

Installation: 2 way

Another method, however, is suitable exclusively for mineral wool. And the point is not that these are instructions - these are installation techniques (hard foam).

Insulation is installed on the mounted sheathing and tucked under the profiles. The method is certainly effective, but due to the weak zone in the area of ​​the profile or bar, the insulation power is lost - this is the most convenient way to finish a loggia with plasterboard with insulation.

Installation: 3 way

And finally, the third method, which is the most effective, but at the same time no different in labor intensity from the first two methods, is installing insulation under the profiles (this can be either foam plastic or mineral wool).

The bottom line is that the material is placed on the brackets (it is held on them) and only then the profiles are mounted - this method also automatically leaves a gap.

You may also need insulation for plasterboard partitions - 99% is mineral wool, which is mounted between the sheets.

Conclusion

It is quite simple to install any of the insulation under the gypsum plasterboard with your own hands, but at the same time try to ensure that there are no free areas left. Maybe you want to suggest something on the topic - don’t be shy and write your comment.

It is not always possible to insulate a high-rise building; special equipment is needed. However, insulating the walls from the inside with mineral wool plus plasterboard gives a good result, heat loss is reduced by 20-30%. It is only important to make a thermal insulation layer in the apartment according to the technology.

Do-it-yourself insulation of walls with plasterboard requires the correct selection of materials. Saving and choosing components that do not correspond to technology will make thermal insulation useless and money spent in vain.

To make high-quality insulation you will need:

1. Wall plasterboard.
2. or wooden slats.
3. Insulation.
4. Fastening materials.

Drywall and profile

Drywall can be used to insulate walls from the inside of the room; it can be either wall or moisture resistant. The latter type is used for rooms with high humidity levels: kitchens or bathrooms.

Wall types of plasterboard are suitable for living rooms where humidity does not exceed the threshold of 70%. marked in blue on a gray surface.

Main types of drywall
Foam insulation

Penoplex is extruded foam plastic, but with high density and strength. Insulating walls with penoplex will cost more, the price per square meter is about 200 rubles.

Penoplex insulation

Another good insulation option is isolon, or polyethylene foam. Its price is 280-300 rubles. per square meter.

Thermal insulation performance when using one type of material or another will depend on compliance with installation rules and the thickness of the insulation.

Insulation with isolon

You will need to purchase fasteners for fixing and for connecting the guide rails to each other (fleas).

The assembly of the frame begins with the installation of guides, which are made from a UD profile. These slats are attached to the floor and ceiling in parallel, 50-60 mm away from the walls. The space under the frame will be used to lay the heat insulator.

The guides are fixed using a nail-type dowel, which provides reliable fastening to brickwork and any other.

After installing the profiles on the floor and ceiling, proceed to the installation of the slats with the CD profile. These planks are the basis for. To ensure that they are rigidly fixed to the wall, direct hangers are mounted, they are also. For a standard apartment with a ceiling height of 2.5-2.6 meters, 3-4 hangers per profile are sufficient.

Installation of the main frame rails is carried out as follows. The segment is inserted into the guides. The ends are fixed using small flea screws. The edges of the hangers are folded from the sides, which are also connected to the slats. The spacing between the frame profiles is maintained so that there are 3-4 slats per sheet of drywall.

To enhance the rigidity of the entire structure, you need to make transverse jumpers from the same material (CD profile). This is done according to the following algorithm.

Jumper to strengthen the structure

The profile is measured and cut so that its length overlaps the neighboring rivers by half. Use metal scissors to cut off the shelves. The resulting blanks are fixed with fleas onto the frame.

When the frame is completed, begin laying the heat insulator.

Wall insulation

Most often, the material used for wall insulation is polystyrene foam or mineral wool. The technology for laying them is almost the same, but it is better to insulate the walls from the inside with mineral wool plus drywall.

The heat insulator is cut into pieces in sizes corresponding to the cells of the frame formed by the profile.

The foam is attached to a special glue, which is prepared with the addition of water. Each individual piece must fit tightly with the adjacent one. If gaps form between them, they are filled with polyurethane foam. After the adhesive mixture has dried. The foam is additionally fixed with plastic dowels and umbrellas. In this case, fastening is carried out end-to-end so that the caps fasten adjacent sheets, and 1-2 dowels are hammered in the middle.

Insulation with cotton wool is carried out using a similar technology. Only the insulator roll is cut to the entire length of the cell. Mineral wool is also attached with glue with the addition of dowels.

After laying the internal thermal insulation, proceed to.

Read also

Covering aerated concrete walls with plasterboard sheets

Installation of gypsum boards

To attach drywall, you need to purchase self-tapping screws. Their number is calculated based on the fact that. Self-tapping screws need to be chosen a little longer, approximately 20 mm. Of course, you can buy 16 mm screws, but when fixing, it is possible that when screwing in, the tip will bend the surface of the profile without drilling into it. Longer screws eliminate this possibility.

This is how drywall should be attached to the profile

You will also need a screwdriver and quality bits.

Installation of drywall sheets is carried out according to this algorithm. The material is laid on the frame and the lower corner is secured. Next, screw the screws in order to the opposite end of the sheet (not all corners at once!).

When the lower and upper sections are fixed, fasten them to the main frame slats. In this case, the pitch between the screws should not exceed 250-300 mm.

When a screw is screwed in, its head should be slightly recessed by 1-1.5 mm. Just don't tear through the cardboard! To simplify the fixing task, it is better to purchase bits with a limiter.

Upon completion of the cladding, the surfaces are prepared for final finishing.

Insulation without frame

Insulating walls with plasterboard from the inside is not always possible with the assembly of the frame. You can carry out insulation without a base.

Initially, the walls are prepared for fastening insulation sheets. All fragile areas are restored, and surfaces are treated with an antiseptic.

Application of antiseptic

Polystyrene foam or cotton wool is attached as in the previous version, that is, an adhesive mixture and plastic dowel nails.

Sheets of plasterboard are mounted using a gypsum mounting mixture of the “perlfix” type. The glue is prepared by adding water and thoroughly mixing with a mixer. The mounting mixture is applied pointwise to the surface of the plasterboard, and the material is pressed against the insulated wall. Additionally, fixation is provided with self-tapping screws.

Insulation of walls without installing a frame made of profiles

However, this method of covering with plasterboard with insulation should be used only as a last resort. The presence of a frame base ensures a higher level of structural reliability, despite various influences: humidity, tension and other loads.

It is preferable to insulate the room from the outside. In this case, a greater heat-saving effect is achieved, load-bearing structures are protected from the influence of the external environment, and the usable area is not reduced. But this is not always possible, especially when it comes to apartment buildings. It is cheaper and more convenient to insulate the walls of a home with plasterboard and penoplex from the inside.

Benefits of penoplex

For internal insulation under gypsum plasterboards, foam plastic, mineral wool or penoplex can be used. Polystyrene foam does not have the best thermal conductivity, and mineral wool is hygroscopic, so penoplex is more preferable for this method of thermal insulation. This is facilitated by its characteristics:

• Light weight of slabs.
• Easy to process and give the desired shape, which greatly facilitates installation. For example, if there is a window or radiator on the wall, then it is not difficult to cut out a piece of foam plastic of the required size to go around them.
• Good moisture and vapor barrier performance.
• Good noise-absorbing properties.
• Strength, durability, safety.

There are few disadvantages:

• The material does not withstand prolonged exposure to the sun. Therefore, you must follow the rules for its storage.
• During operation, it may be damaged by rodents.
• Quite expensive compared to other materials.

A few nuances that you need to know about when installing insulation under drywall

As already mentioned, insulating walls from the inside is not the most optimal solution due to some disadvantages of this method. Let's consider 3 main nuances:

1. Dew point offset. It ends up between the wall and the insulation, so the base can become damp from the inside.
2. Reducing the size of the room. Thermal insulator, frame, gypsum boards occupy part of the internal space.
3. Reducing the permissible load on the floor surface. The insulation may not withstand heavy objects hung on the wall, so it is recommended to use anchors if necessary.

Required materials and tools

To install insulation under drywall you will need:

• Directly the penoplex itself. For internal wall insulation, products marked “C” with a thickness of up to 30 mm are used.
• Reinforcing mesh, plaster and putty. They are useful both for leveling the base surface and for finishing drywall.
• Deep penetration primer and special for gypsum plasterboards.
• Glue intended for fastening penoplex.
• Vapor barrier.

For the frame method of installing drywall, penofol with a foil surface is ideal. It will reflect heat into the room.

• Dowels. The insulation boards are fastened to their disc-shaped type, and the metal frame profiles are fastened to dowel-nails.
• Guide and rack profile for creating a frame.
• Metal screws for fastening elements, direct hangers and other necessary fasteners.
• Silicone sealant.

Tools:

• Drill with mixer and container for preparing adhesive solution.
• A hammer drill with a drill for drilling holes for dowels on which we will attach profiles.
• Metal scissors.
• Screwdriver.
• Painting knife.
• Spatulas and graters, sandpaper.
• Roller and brush for applying primer.
• Marking tools: level, plumb line, tape measure, pencil.

Methods for laying penoplex under drywall

There are two installation options: with and without a frame. You can correctly install insulation under gypsum boards with your own hands using both methods, the main thing is to know their advantages and disadvantages.

• The frameless method is suitable for insulating small and flat surfaces. Quick, easy installation of insulation and drywall. Disadvantages: inability to level the base surface, low structural strength.
• The frame method is used if the walls are curved or have a significant area. This type of structure is more difficult to build, but it is more reliable.

Penoplex insulation under drywall without frame

Step-by-step instructions will be like this:

• At the first stage, the base surface is prepared: the old coating is removed, cracks and potholes are sealed, and protrusions are knocked down. The wall should be as flat as possible.
• The surface is treated with a deep penetration primer.
• According to the manufacturer's recommendations, a special composition is prepared. If you don't have it, you can use tile adhesive.
• The inside of the insulation board is rolled with a needle roller. Another option is to brush it with a metal brush. This will ensure good adhesion to the adhesive solution.

The glue is applied to the surface of the sheet using a notched trowel. It is not necessary to cover the entire slab with the composition: it is enough to coat the perimeter and center, options are shown in the photo.

• A fragment of insulation is applied to the wall and held for a minute. Be sure to check the correct installation at the building level.
• They start from the bottom. It is recommended to move the rows relative to each other so that the slabs are staggered.

For reliability, penoplex is secured with disc-shaped dowels: 4 are placed at the edges and one in the center.

• The seams between the plates are filled with silicone sealant; wide cracks can be sealed with polyurethane foam.
• Drywall is attached to the insulation using. The scheme for applying the composition is the same as for penoplex slabs. It is recommended to place a layer of vapor barrier between them.
• After the glue has dried, which will take 24 hours, the drywall is finished. The seams are sealed using putty and serpyanka mesh, rubbed down, after which the entire surface is covered with a double layer of primer.

• Vertical elements are mounted. They are screwed to the guides with metal screws. The deviation is adjusted using direct hangers located every 50–60 cm. The position of the racks is checked with a building level.
• Glue the penoplex to the wall in the same way as with the frameless method. The insulation boards are rolled with a roller with needles, and an adhesive solution is applied. Then they are tightly inserted between the vertical posts and pressed for 40–60 seconds.

Advice. Pieces of insulation are placed in the metal profile to prevent heat transfer through the studs. Another option is to fill them with foam.

• Sheets of drywall, if necessary, are cut into the required fragments. Docking of gypsum boards occurs strictly on racks. Fixation is carried out with self-tapping screws in increments of 25–30 cm. In order not to damage the surface of the drywall during installation, a special bit is placed on the screwdriver, limiting the depth of screw tightening. You can find it in construction stores.
• It is made using reinforcing tape and putty. After grouting, the entire wall is covered with two layers of a special primer for drywall. The second layer is applied after the first has dried.

Thus, it is quite possible to insulate the walls of an apartment from the inside using penoplex and plasterboard with your own hands. If you do everything correctly and carefully, the desired effect will definitely be achieved. The process can be seen in detail in the following video. And if you have any questions during the work, ask them in the comments.

Insulating an apartment allows you to significantly save on heating costs in the autumn-winter season. Most often, walls are insulated inside the apartment, and not outside. This is much more economical and does not require the services of professional workers and expensive materials for exterior finishing. For thermal insulation indoors, as a rule, structures made of metal profiles and plasterboard sheets are used. This method is easy and quick to install. Today you will learn how to independently install a plasterboard structure in an apartment.

How well does drywall retain heat?

Plasterboard sheets, among other advantages, have a low thermal conductivity coefficient. For this material it is 0.15, which is ten times lower than that of reinforced concrete. This allows you to significantly retain heat in the apartment and not let in cold air or summer heat.

Typically, to enhance the effect, additional materials are used that are placed between the main wall and the new structure. Polystyrene or foam plastic can be used for thermal insulation. These materials are easy to work with, but they are not often used in insulation. The main problem is that their effects on the human body have not been fully studied. In addition, they do not absorb sound well, and small rodents can damage them. Glass wool is used more often due to its budget cost and low thermal conductivity.

The disadvantage of the material is that it must be installed only with gloves. The composition of glass wool causes itching and irritation upon contact with the skin. Basalt wool is very similar to glass wool, but it is made from rocks of magnetic origin. One of the highest quality heat and sound insulating materials is isolon. It is sold in thin sheets, which allows you to not change the area of ​​​​the room too much.

Installation of gypsum board sheets

After installing the drywall, further finishing of the room is carried out. Following the processing of drywall, which we wrote about earlier, wallpaper, tiles, decorative stone or other finishing materials are glued to the walls.

Insulation of an unheated room

Many novice builders are interested in the issue of installing gypsum board in an unheated room. We warn you right away: most professionals are against such installation. The fact is that even moisture-resistant material cannot withstand strong changes in temperature and humidity. If you decide to install plasterboard structures in such a room, but do not want to install additional thermal insulation, it is enough to attach the sheets to a frame made of metal profiles. The air between the structure and the main wall will provide some thermal insulation.

It is possible to insulate an unheated room, such as a loggia or, only under certain conditions. Firstly, it must be glazed. We are not talking about simple wooden frames, but at least double-glazed windows. They provide reliable protection from moisture and cold. In addition to the walls, you will need to insulate the floor and ceiling, which are covered with high-quality moisture-resistant plasterboard.

GCR can be used in loggias that are connected to a living room with a normal microclimate. Think carefully before you start installing drywall in such rooms, because the structure “eats up” at least 6-7 cm of space. Thermal insulation in the loggia is carried out in the same way as in ordinary rooms, but with some features. First, the wall is covered with waterproofing material.

conclusions

If you approach wall insulation responsibly, you can create an atmosphere of comfort in any apartment. We hope that our simple instructions will help you implement this plan. Good luck.

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