Roof insulation from the inside with your own hands. Technology of roof insulation

As you know, one of the main tasks of the roof of any building is to protect the structure from moisture penetration and other external factors. In addition, the roof must reliably keep the heat in the house. In this regard, you need to know what is the technology of roof insulation. About this and talk further.

Material: general information of choice

Many decide to make the roof insulation from the inside with their own hands. It is logical that the owners of residential buildings face the question of which material to choose. The minimum thickness of the insulation layer is 25 mm. The optimal figure is 10 cm. Today, you can see a variety of insulation materials for roofs on the market. Modern products have high performance characteristics. When choosing a material, it is necessary to take into account a number of important factors:

• The cost.
• Operational properties.
• Resistance to mechanical damage.

The choice of material is also affected by the type of roofing. The roof can be:

• Mansard,
• Pitched,
• Flat,
• Hipped roof.

Roof insulation from the inside with your own hands can be carried out using widely distributed materials. In particular, they include:

• Foamed glass,
• Mineral wool slabs,
• Foam concrete,
• Fiberglass plates,
• Polyurethane foam,
• Expanded polystyrene.

The presented materials are intended for different types of roofs and differ in the level of water absorption, ecological compatibility, thermal conductivity and vapor permeability. When choosing insulation, factors such as price and strength must also be taken into account. It is often enough to insulate the roof with foam from the inside. It is quite practical and easy to lay material. It is also common to insulate the roof from the inside with a mineral wool. This is due to the fact that this material has the ability to withstand sufficiently high temperatures. It also has a low thermal conductivity. In addition, fibrous plates are considered a universal material. With its help it is possible to realize the warming of a wooden roof of any type.

Features of fibrous materials

Today, it is possible to insulate the roof from inside with mineral wool on various bases. It can use:

• basalt,
• fiberglass,
• cellulose,
• Foam glass.

It is recommended that the roof be insulated from the inside with the help of the first two types. However, one should not forget that fiberglass does not have a high moisture absorbing property. When using mineral wool, it is necessary to additionally lay hydro-and vapor-insulating layers. One of the varieties of glass wool is "Izover". Due to the use of a special technology, air is present in the structure of the material during production. Due to it, "Isover" has a sufficiently low thermal conductivity. In addition, the material has a high level of sound insulation. One of the undoubted advantages of glass wool is its durability. The operating period can be up to half a century. In addition, it does not burn.

Additional materials

Carrying out the roof insulation from the inside with your own hands, it is necessary to equip the waterproofing. The most common materials in this category are:

• polyurethane,
• mastic,
• Ruberoid and others.

In addition, when performing roof insulation, various films are used to ensure insulation protection. They may be:

• Polyethylene,
• Perforated,
• Reinforced cloth or mesh.

It should be noted that the above lists are far from complete. Among the existing range, many are difficult to determine the choice of insulation. In this case, you should consult with experts or more experienced craftsmen. Incorrectly selected material and errors in its installation can lead to heat loss in the house.

Key recommendations

Carrying out the insulation of the pitched roof from the inside, it is necessary to ensure that the insulation does not overlap the ventilation gap. When using a superdiffuse membrane during installation, the material is mounted close to it. If a traditional under-roof film is used, it is necessary to provide gaps above and below it. The joints of the heater of adjacent rows should be staggered. For a more secure fit of the insulation to the rafters, the width of the material must be greater than the distance between the structural elements of the roof. Plates of insulation must be laid tightly to each other. With a large step between the rafters, the material must also be fixed from the side of the room. For this, screws are screwed in and a wire is stretched between them. It will additionally support the insulation material. With a small cross-section the rafters are laid under and between the beams.

Preparation

First of all, it is necessary to check the roofing elements for integrity. If any signs of rotting, damage, dampness are detected, such parts are replaced. All structural elements must be treated with an antiseptic. In the case of the presence of wires or heating pipes or water supply, it is also necessary to assess their condition. Sites in which it is supposed to carry out the laying of the material, are cleaned of dirt, dried.

The process of laying materials

For sloping roofs, slab and roll insulation are best suited . The materials are laid in the crate between the rafters. In the process of work, a vapor barrier layer is also installed under the insulation. A sealing tape is laid from above. Between the roofing and the heater, leave a gap. The heater can be laid on top of the rafters. If this work is done correctly, the material will also be a good soundproofing device.

Common Mistakes

The first is the wrong choice of the width of the material. The insulation must not be narrower than the distance between the rafters. Otherwise, gaps are formed. This, in turn, will significantly reduce the quality of roof insulation. The second error is the moistening of the material. This should not be allowed in any case. Otherwise, the metal elements will start to be covered with rust, and the wooden parts will rot. The under-roof space as a result becomes filled with an unpleasant smell. In addition, if the material is very wet, then water leakage into the building is inevitable. Another mistake is ignoring the use of steam and waterproofing. If you do not provide this protection, then all means and time will be wasted.

Mansard roof insulation: features

Planning the arrangement of the roof of such a premise, it is necessary to take into account some nuances. Thus, with high humidity in the attic, reinforced films are used, one side of which is covered with a special foil. Carrying out the insulation of the attic roof, special attention should be paid to the sections of the ceiling connection with the external walls. In these places, the insulation should be as sweaty as possible on the vertical surfaces. Otherwise, "cold bridges" may form . In the presence of cornices, they must also be insulated. In this case, cold air will not penetrate into the space under the roof. In complex areas for fixing the film, a construction stapler is used. This is quite convenient and greatly facilitates the process of laying the insulation material. Also used for fixing and racks of wood.

Finally

Despite the fact that the described process of roof insulation with their own hands seems to be quite simple, it is necessary to follow all recommendations. One of the common mistakes of homeowners is the choice of cheap material for insulation, savings on hydro and steam insulation. However, as practice shows, such aspirations do not justify themselves. Poor quality of the insulation of the roof leads to a significant loss of heat. In this case, not only the material itself is damaged, but also the structural elements of the roof. In addition, the operating period of cheap heaters is small enough. A few years later, all the work has to be done. And if there are damages in the rafter system - repair it. Properly arranged heat insulation will significantly save on heating and electricity. With special care should be taken to protect the attic room.