Steam insulation for the ceiling in the wooden floor: materials, installation, feedback

When erecting a house, the issue of vapor barrier insulation does not initially arise. Above this problem, the owner of the home starts to think about when it comes to warming the room. It turns out that not all home masters know how to equip the vapor barrier layer. It is also important to decide what material to use for this. After all, a simple film, for example, is used today less and less.

The need for a vapor barrier in the ceilings of the ceiling

Steam insulation for the ceiling in a wooden floor is necessary. This will prevent the penetration of vapors into the layer of thermal insulation. Materials will be protected from the destructive effects of moisture. This will avoid contact of moist air with a heater. If you ignore these rules, it will be covered with mold, as well as fungus. At the same time, the whole building will serve much less. After all, the structures must be reliably protected from the negative impact.

The presence of a vapor barrier layer allows not only to protect materials from water, but also to reduce heat loss. If coatings with a foil layer are used, they will reflect most of the heat, sending back to the room. But the moist air can freely go out. As the main task of this coating is protecting the thermal insulation from accumulating moisture in it.

Choice of materials

Before you have a vapor barrier for the ceiling in the wooden floor, you need to purchase the material, taking into account the budget for the work, as well as the purpose. Proceeding from this, it is possible to allocate the following materials:

• polyethylene;
• Films with membrane effect;
• Parchment;
• Varnishes;
• Mastics;
• Foil materials.

If we are talking about films with a membrane effect, they will not pass moisture inside the premises. Among other things, they prevent its coming out. Varnishes and mastics have the same effect. But one of the cheapest materials is parchment. Quite often, experts do not recommend using a conventional polyethylene film for mounting a vapor barrier layer. It is used only in the most extreme cases. Such a coating will not pass air, turning the building into a sealed box. In this case, the rooms are not ventilated, condensate accumulates on the surface of the film. As a result, moisture settles indoors, contributing to fungus and mold.

Let's say you decided that you need a vapor barrier for the ceiling in a wooden floor. In this case, the parchment can be used only if the money is not enough for better material. It is not durable. Choose it most often for the reason that it has a low cost. According to experts, the best solution is a vapor barrier based on liquid mastics or membrane films. With their help, it is possible to reliably protect the floors, ensuring the exit of wet fumes to the outside.

Recommendations for the installation of vapor barrier layer

Steam insulation for a ceiling in a wooden floor must not only be correctly chosen, but also installed on technology. As a rule, the material is laid inside the premises. If the temperature drops in the cold season are large enough, and frosts reach below 30 ° C, the vapor barrier is installed on both sides. This will eliminate the occurrence of condensation in the insulation and keep more heat inside the premises. But that is not all. It should be remembered that the vapor barrier must be laid on the ceiling until the moment you equip the layer of insulation. Cloths are stretched without sagging and wrinkles. Neighboring pieces overlap with overlap. All joints are glued with building tape, which allows to ensure the passage of air.

Steam insulation - a film that is fixed with special nails with a wide bonnet. Replace such fasteners with staples of a construction stapler. Under them it is necessary to lay gaskets from cardboard or any other similar material to exclude film rupture. The step between the fastening points should not be more than 30 cm. When the film is planned to be sewn to the blacking overlap, the fixation is carried out using metal profiles or elements of the lathing.

Quite often, home masters think about how to properly install the vapor barrier. Which side to lay this material, it is important to decide even before the work starts. Thus, the smooth side of the film must face outwards, towards the rough overlap. If you confuse, you can get the opposite effect. It consists in the fact that water vapor will settle inside the thermal insulation. This will inevitably lead to the destruction of the material. Between the vapor barrier and the roofing material, a small gap should be left. This is true when the vapor barrier is planned to be laid from two sides. Such an approach will allow circulating moist air and freely flow out.

Tips for the installation specialist

When laying the vapor barrier layer, it is necessary to exclude the presence of holes and gaps between the webs. This will ensure the protection of thermal insulation and structural elements of the building. If a sheet vapor barrier is used, the laying is carried out from the side of the roof. The material is placed under the layer of insulation after its full packing. Outside there must be another layer of vapor barrier. This will guarantee better protection for the insulation. A liquid vapor barrier for the ceiling is applied from the outside to a pre-prepared structure. After the first layer has dried, two more should be applied with a gap for complete drying. It is better to carry out such work in warm weather. It is important to wait until there is rain.

In the construction of any house requires a vapor barrier. Which side to stack this material, you should inquire at the initial stage of the work. For example, foil sheets are quite actively used today for the vapor barrier layer. They have one advantage, which is the ability to reduce heat loss. To do this, the foil side must be turned inward to allow the heat to flow back into the house.

Reviews of the standard vapor barrier for the ceiling

If you still think which vapor barrier to choose for the ceiling of the house, then you should listen to the opinion of the owners of real estate. They argue that the standard will work correctly if it is placed on the inside of the enclosure. Water vaporization will not pass inside the ceiling and to the heater. As the most common materials of this type are: "Technonikol", "Izospan", as well as "Ekolayf".

Reviews about the vapor barrier with a reflex layer

Steam insulation - materials that can be combined into one group. We select the variants with the reflex layer as one subspecies. According to users, they have a reflective effect. Do not miss the steam, the radiant heat goes into the room. They perform the function of additional thermal insulation. Their use, according to the home-made masters, is most effective when there is an increased formation of steam. The most widespread were Penofol and Alucraft.

Reviews about the vapor barrier with controlled permeability

If you are wondering what to use for the vapor barrier of the ceiling, then you can consider materials with limited permeability. As the buyers emphasize, this approach is rational in the case when housing is not constantly used. Here you can include country houses. The steam generation cycle is not stable at the same time. And after the departure of the owners in the arrangement of the vapor barrier layer with limited permeability, the steam will come out. According to buyers, such membranes are able to maintain the required level of vapor barrier. Their permeability is Sd = 2-4 m.

Reviews of the vapor barrier with variable permeability

This kind can be used when repairs are carried out in the attic floor area. With this approach, the vapor barrier can only be laid on top, the ventilation gap is not settled. The permeability coefficient in this case varies within 5 m, which is true for a dry membrane; If it is a wetted material, then the parameter is 0.2 m. Most often, consumers choose Delta-Sd-Flexx, which refers to this type of vapor barrier.

Reviews of membranes

Membranes are considered a new type of vapor barrier materials. According to buyers, they serve as a steam and hydro-borer. If they are compared with films, the latter do not pass water and vapor, which is completely independent of the direction. If we are talking about membranes, they are characterized by one-sided permeability. This indicates that it is not at all a matter of indifference to which side to pack them. Owners of real estate emphasize that the steam will pass through the material, while the water will not meet to meet. It is noteworthy that membranes can be single-, double- and multilayer. The most economical is the second option. At the same time, efficiency in all cases remains at the same level.

Cost of vapor barrier materials

Steam insulation is a film that can be produced by different companies. If we are talking about the hydro-vapor insulating material of the Isospan company, then the variety denoted by the letter B will cost the consumer 1,000 rubles. If you want to choose wind and waterproof membrane "Izospan A", then you will have to pay 1500 rubles for it. On sale, you can also find products to protect the material from steam and water. If it has the name "Izospan D", then you have to pay 1400 rubles. Steam insulation for the ceiling in the wooden ceiling, the price of which is 1300 rubles., Can also be represented by reinforced film. If you prefer this variety, then you can consider Polinet Lux, which has the following dimensions: 2x25 m.

Conclusion

Above, we considered the types of vapor barrier for the ceiling. Depending on the budget, as well as the goals, you can choose one of them. It is not always advisable to save, for, for example, a conventional film may not perform the tasks assigned to it.