How to properly insulate the ceiling under a cold roof? Features of cold roofing

We all know that the roof is the most important element of any structure. It protects it from the effects of atmospheric phenomena and prevents the penetration of cold air into the room. However, if the roof is not equipped with a heater, it can not adequately protect the house from heat loss, and as a result - the cost of heating increases and the temperature inside the room does not reach the desired level.

To eliminate this problem, you can hire a repair team, which will quickly perform all the necessary work. However, if we consider that the cost of such services is high enough, it is much more expedient to make the installation of thermal insulation with our own hands. Therefore, in this article we will consider how to properly insulate the ceiling under a cold roof and what insulating materials to use for this.

Distinctive features of the roof of the cold type

Arrangement of a cold roof in some cases is very expedient. Such a roof is economical enough, reliable and simple to install, which is very important when it comes to building outbuildings, garages, arbors and other structures. The whole point is in a single-layer structure. That is, only the waterproofing film (not always) and the roofing material are laid on top of the rafter system. This design can not prevent heat loss at home, so most often it undergoes thermal insulation. This process has its own nuances, which should be taken into account during the execution of work.

How to properly insulate the ceiling under a cold roof? This issue is best to consider at the stage of erection of the house, but in most cases, the work is carried out in the already finished building. Let's consider what options for insulation of floors are available today.

Ways of installation of a heater

Before choosing one or another insulation material, you should determine with which side of the attic floor work will be done: inside or outside. The method of warming depends on this. Pay attention to the fact that both options have their negative sides.

If the installation of thermal insulation material will be carried out from the side of the room, the height of its walls will be significantly reduced. This should be taken into account for the owners of houses, in which the rooms seem to be too low. In addition, after installing the insulation, the ceiling will need to be sewn with some kind of finishing material, which will lead to additional waste.

Warming from the attic is much easier. It will also allow you to leave the height of the rooms at the same level. In order to use the attic as a full-fledged room, a new plank floor must be laid on top of the insulation.

How to choose a thermal insulation material

Thinking about how to properly insulate the ceiling under a cold roof, it is worth paying attention to the criteria that the selected material should match. They include:

• Ecological compatibility;
• Low thermal conductivity;
• Resistance to colonization by microorganisms;
• a light weight.

Since the insulation will exert additional stress on the walls of the house, it is very important that its weight is minimal. In light suburban buildings, the use of heavy materials is extremely dangerous.

What materials can I use?

How to properly insulate the ceiling under a cold roof? To do this, it is necessary to understand the materials used for these purposes, and their main characteristics. Today, the market of construction products offers us a huge choice of insulation, but as a heater for the ceiling is often used bulk options. For these purposes are suitable:

• mineral wool;
• Granulated expanded clay;
• Wood sawdust.

Consider the characteristics and the process of mounting each of them.

Glass wool

Mineral wool (or glass wool) is a traditional eco-friendly material with a low level of thermal conductivity. It is quite simple to install and can be fixed both from the outside and from the inside of the ceiling.

Let's figure out how to properly insulate the ceiling under a cold roof with a minnow. The technology of laying the roll material implies the following:

• The base on which the material will be laid is cleared of dust and all sorts of debris.
• On the prepared surface overlap have a waterproofing. Usually, for these purposes, use is made of pergamine. Docking points are covered with adhesive tape.
• Next, the cotton wool is laid. It should lie densely in the space between the beams. The presence of gaps and gaps is unacceptable. If there are any, they should be blown with a mounting foam.
• A second layer of waterproofing is laid on top of the heater.
• The resulting base is sewed with OSB boards, particle board or floor boards.

How to properly insulate the ceiling under a cold roof from inside the room

Internal insulation is much more difficult and inconvenient outside. During work use all the same cotton or polystyrene. Installation is carried out in the following order:

• A vapor barrier film is fixed to the lower part of the rafters . The work is done with a construction stapler.
• To the prepared ceiling the thermal insulation material is fixed. Polyfoam is fixed to a special glue, and mineral wool is nailed with staples.
• The heater is laid with a second layer of vapor barrier, after which the decorative finish of the ceiling is performed.

Sawdust

Sawdust is considered to be the simplest and most economical way to insulate the ceiling. However, pay attention to the fact that not all wood chips are suitable for these purposes. Here you can use only dry and clean material, from which a special solution will be made.

For its preparation for every 10 buckets of sawdust take one bucket of cement, 0.5 buckets of slaked lime, antiseptic and water. All components are mixed until the liquid ceases to be released from the mixture.

To understand how to properly insulate the ceiling under a cold roof with sawdust, consider this technology in more detail:

• On the overlap (overlap 20 cm) lay steam and waterproofing material. All available seams are glued with a foil-based tape. Similarly, the rafters and the chimney are insulated.
• On the pasted base, the previously prepared mixture is evenly distributed.
• After all the solution is poured, it is carefully compacted so that it fills all voids. The total thickness of the insulating layer should be about 30 cm. Usually it takes about two weeks for the mixture to dry out.

Expanded clay

Claydite is a porous material that is made of clay. In the market it is presented in the form of granules of various fractions. The material is characterized by low weight, environmental friendliness, fire safety, strength and resistance to decay. Low cost makes it very popular, so it is often used as a heater. Now consider how to properly insulate the ceiling under a cold roof (in a wooden house) with the help of expanded clay.

The technology in this case is very simple:

• The waterproofing film is laid as described above.
• On top of her poured an even layer of clay.
• The prepared base is laid with prepared claydite with a thickness of at least 15 cm. Note that if you mix large and small granules of expanded clay, the insulation layer will be more dense and reliable.
• Over the clay fill fill the cement screed. This concludes the work. If the attic space is to be used as a living room, any floor covering is laid on top of the screed.

The process of insulation of the ceiling in the bath

Separately, I want to dwell on how to properly insulate the ceiling under a cold roof in the bath. Since this room is characterized by a specific microclimate, the installation of thermal insulation inside it has some features.

For example, if you decide to use mineral wool, pay proper attention to the waterproofing. This requirement is due to the fact that when the material gets wet, the material gets lost and completely loses its original qualities. Because of this, the integrity of the insulating layer may be compromised, hot steam will settle on the ceiling in the form of condensate, and the cotton wool itself will turn into a place for the reproduction of bacteria and mold. To prevent this from happening, a waterproofing film should be laid over the insulation material, leaving a small gap.

If, however, it is decided to use claydite as the thermal insulation, it is laid with a thick layer (not less than 30 cm). This material is also prone to accumulation of moisture and requires the installation of high-quality waterproofing.

Warming the ceiling in the steam room can be, using the "grandfather" way. First, a two-centimeter layer of clay or peat with chernozem is laid on the floors. Above the resulting "carpet" a mixture of leaves and sawdust is poured out, and a 15-centimeter layer of earth is torn from above.

Conclusion

We hope, after reading the above information, you understand how to properly insulate the ceiling under a cold roof. The photos published in this article will help you to get a general idea of this process and do the work yourself. We wish you easy and fast repair!