Roof insulation from the inside: features of the work

 

In order to be comfortable and cozy in the built house, it is worth paying special attention to such an issue as roof insulation from the inside. This question is quite important, and therefore requires great attention.

According to experts, it is necessary to insulate the roof when the roofing has not yet been installed on the roof.

Why exactly? Because it is easier to make, and there is a small chance that the installation will be done incorrectly. However, this opinion is typical only in theory.

It is sometimes difficult to do this in practice. In fact, the weather can also affect the process. The entire rafter system, as well as the insulation, can get wet, as they must be left open for a while.

Naturally, the thermal insulation of the roof from such a situation can be significantly affected. That is why, most often you have to insulate the roof from the inside. When the installation of the roof is already done.

In order for the roof to be properly insulated, it is necessary to take into account a few simple rules, as well as take into account some of the nuances of this issue. Let's talk about this in particular.

1. When building a roof, thermal insulation is a rather serious issue, and each project provides for ventilation gaps. It is very important that during installation those same gaps are not blocked. If a superdiffusion roofing membrane is used during work, it is very important to ensure that the insulation is installed in direct density to the membrane. In this case, the membrane should be adjacent to the insulation, but do not do this in such a way that the membrane rises above the wooden rafters. This may cause the ventilation gap to be blocked.
2. The next nuance is that the joints of the insulation boards of adjacent layers must be staggered.
3. If the project provides for a thickness of insulation equal to 200 mm, then it is best to use two layers equal in width to 100 mm, but not four to 50.
4. Using the material in order to insulate the roof of the house, it is very important to use it with a certain width. In particular, the width of the insulation must be greater than the distance between the rafters. This is necessary so that the material can fit snugly against them.

Your attention! Also, it is worth noting the fact that heaters that are made using plant materials have high elasticity and are not able to crumble much. This indicator significantly distinguishes this material from that which is made using a mineral base. Therefore, it is quite normal when uneven edges are obtained when cutting the material.

1. The tight fit of the material both to each other and to the rafters is a very important fact. If you do not notice the gap. Then in the cold frost will appear there, and in the thaw it will begin to melt all over and as a result the roof will begin to show its tears.
2. if the roof was built with such an indicator when the pitch of the rafters is very wide, then it is worth thinking about fixing the material from the side of the room. You can do this work using high-quality wire. You can attach one to the rafters using self-tapping screws to the rafters themselves. Further, the insulation will be held by the crate from the side of the room.
3. If the existing rafters do not have a sufficient section to insulate the roof of a wooden house, you can take advantage of the combined scheme. In particular, this is the possibility of roof insulation under the rafters and between the rafters. The scheme is as follows. From the side of the room, bars are attached across the rafters, which will be a crate. A layer of additional insulation will be installed between these bars. This heating system is highly efficient. The thing is that the bottom layer is able to completely cover the rafters, which, in essence, will be “cold bridges”.
4. if in the process of work you came to the conclusion to use a mineral wool type insulation, then it is worth remembering. What additionally needs to be taken care of is such an issue as vapor barrier, equipped from the side of the room. Choosing a film for this, you should not save money on this material. The thing is that poor-quality material can cause the mineral fiber insulation to simply become waterlogged. This means that the efficiency of insulation will also decrease. This reason can become the main one in order to pay special attention to the quality of installation work with the film, as well as the process of gluing the joints that need to be done between the film sheets, as well as between the same film and the structure. For gluing, you should pay attention to the purchase of adhesive tape.
5. If you decide to use plant-based insulation for insulation, then the traditional type of vapor barrier can be completely replaced with a special-purpose membrane. A vapor permeable membrane may also be used. However, in this case it will be relevant when it is necessary to equip the so-called breathing roof.

Choosing a material

When choosing a material in order to insulate the roof, it is worth paying special attention to the fact that it is necessary to use the material that is able to maintain its original qualities for quite a long time.

In other words, the insulation should not only insulate the roof for the first year or two.

Among other things, the selected insulation must have the ability to maintain its thermal insulation properties for a long time, water resistance, biostability, be environmentally friendly, etc.

In other words, the insulation of a concrete roof, as well as roofs made of other materials, must be made using quality materials.

In order to choose a heater in terms of thermal conductivity, you should pay attention that the lower it is, the better. In the building materials market, due to the huge competition in this matter, almost all heaters can demonstrate this indicator in the category of 0.04 W / m ° C.

This means that choosing a heater based on this characteristic will not be difficult.

Now to the point. It is worth paying attention to the weight of the insulation, moreover, of a volumetric type, unless, of course, you are going to insulate the roof with foam.

According to this characteristic, materials can differ significantly from each other. For a specific example, we can say that modern heaters, which are fully suitable for such work, have the following indicator: the mass of this cubic meter is from 11 to 350 kg.

Advice! It is worth noting that roof insulation using a material with a large volumetric weight can lead to the fact that the roof becomes heavier by a certain parameter.

Therefore, the design of the roof, or rather the truss system, must be designed in such a way that it can withstand the load that is created by the insulation system. At the same time, if we take into account the weight of the insulation, it can be noted that the process of roof insulation can differ significantly.

For example, if the insulation is quite light, then it is better to install them on the frame. The latter consists of crates and rafters. In the event that the insulation is heavier, then it is installed on top of the rafters.

At the same time, heavier heaters have increased rigidity, which allows them to independently withstand a fairly large weight as a roof, as well as snow that will press on it.

Here, light materials are primarily characterized by the fact that they have high softness and thus are not always able to withstand even a small load of snow.

It is especially important to foresee this parameter when choosing when it is necessary to insulate an old roof with a non-updated truss system.

Some material quality factors

In order to determine the quality indicators of the material that is necessary for roof insulation, it is necessary to analyze several factors. Let's talk about them.

1. Form stability. This factor is key. The correct form of the material, as well as its exact dimensions, can ensure high quality roofing. Moreover, this quality can be ensured for a long time.
2. Flammability. Another factor that affects the quality of further insulation of the roof. You should choose the material that has high rates of incombustibility, as well as high rates of self-extinguishing. However, one should not expect a miracle from such indicators. If this material is placed in the epicenter of the fire, then it can also melt and burn.
3. Humidity. The humidity indicator is also an important nuance when choosing. If the humidity increases, then the thermal conductivity increases, which means that the indicator of roof insulation also deteriorates.

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