“Izospan B” (which side to lay it to the insulation, you will learn from the article) is a material that acts as a vapor barrier, when there is a need to protect thermal insulation or other structural elements that can be saturated with moisture vapor during operation. The vapor barrier can be used in buildings of any purpose. Its structure has two layers, one of which is smooth, while the other is rough. The last layer allows the material to retain moisture droplets, which then evaporate.
Need to use
The use of vapor barrier material "Isospan B" allows for a long time to maintain the performance of thermal insulation. The material prevents the formation of excess moisture, protecting the building components from corrosion and damage by microorganisms. Another additional function of vapor barrier is that it protects the room from penetration into the insulation fibers.
Which side to cover
Quite often, “Isospan B” has recently been used as a vapor barrier. Which side to lay it to the insulation, you should ask before starting installation. At the first stage, the consumer should decide where the smooth and rough surface is. According to the instructions, the smooth side should be facing the surface of the insulation, this advice must be followed strictly. The membrane is installed on the supporting elements of the frame or on the rough skin. To use as fasteners, it is necessary to use the brackets of the construction stapler.
If the room will have finishing material in the form of plywood or lining, then Izospan B is fixed on the frame with wooden slats with a cross section of 4x5 cm. Installation work involves tight joining of the insulation with the film. If the material is used as a vapor barrier for the roof, then horizontal strips should be overlapped, and it is necessary to start these works from the bottom. Horizontal and vertical overlap should be approximately 15 cm.
Isospan B material is used for internal work. Which side to the heater to lay it, you now know. However, during installation, there are many nuances that must be observed. For example, vapor barrier can be used when installing floors. In this case, the canvas should be laid on the ceiling lags. The material must be placed between the subfloor and the ceiling finishing material. A gap of up to 5 cm should be left between the insulation and the top layer of the membrane, as well as between the membrane and the floor.
Additional recommendations on the location of Izospan B coating
If you also decided to use Izospan B during repair work, which side should be placed on the insulation, it is important to ask before the start of the manipulation. For example, if the working surface is represented by drywall, the membrane should be fixed to the galvanized profile. It should be tightly mounted with the smooth side to the insulation. All joints and places where the membrane will be connected to other materials must be glued with a connecting tape of the same manufacturer. Do not forget to leave a ventilation gap of 3 cm, which is necessary to eliminate the dew point shift and reduce the likelihood of accumulation of excess moisture.
Quite often, people wonder what side to have a vapor barrier to a heater if the latter is fixed on the outside of the wall. In this case, "Isospan B" should be installed indoors, and its rough part should be facing inward. To fasten the material in all cases, you can use a stapler or slats, the last of which are nailed. Both solutions are good, the main thing is to purchase galvanized fasteners, which will last a long time and will not cause rust spots.
Overlap formation
After you figured out which side to put Izospan to the insulation, you need to pay attention to one more point, which is the need for the formation of an overlap of a width of 20 cm between the sheets, which will exclude the penetration of air under the material. If fixing is carried out to vertical profiles, then the material should be tensioned to prevent it from sagging. A slight relaxation is possible, but its fluctuations should not exceed 50 mm.
Specifications
Vapor barrier Izospan is quite common today. Which side to the heater to lay it, was mentioned above. However, you may also be interested in technical specifications, as well as the purpose. For example, the areas of use in this case are as follows:
- insulated sloping roofs;
- internal walls;
- floor floors ;
- frame walls;
- attic floors ;
- basement ceilings.
Material is produced with a width that can be equal to 1.4 or 1.6 m. The area of one roll is 35 or 70 m 2 . The composition contains one hundred percent polypropylene, its breaking load (transverse and longitudinal) is 107 and 130 N / cm, respectively. The vapor permeation resistance per square meter is 7 Pa / mg. The water resistance of the material is 1000 mm of water. Art. Within 4 months, the surface of Izospan B will be able to undergo exposure to ultraviolet radiation. It can be operated in the temperature range from -60 to +80 ° .
Steam insulation work technology
If you also decided to use Izospan B, which side should be laid to the insulation, you need to decide before starting work. This was described in more detail above. However, not only the correct location of the material with respect to thermal insulation is a guarantee of a successful procedure. It is important to comply with all the rules of technology. Thus, it should be borne in mind that the vapor barrier coating is laid according to the principle that is used when installing the waterproofing layer. The coating should be laid in its entirety; there should be a minimum number of gaps. In those places where the coating adjoins the wall, it is important to bring it to a vertical surface by about 15 cm in order to prevent moisture insulation. The vapor barrier must also not be humidified during work.
Adjacent webs should be overlapped, and it is important to prevent the formation of voids and holes. Isospan B is becoming more common today. Which side to lay it to the heater, it is important to understand for yourself. But you must also remember that in winter such work should be carried out in warm places. The surface where the vapor barrier will be laid must be prepared, cleaned of impurities, dried and heated. If the rolls were stored in the cold, then they are previously kept warm for at least a day. Do not transfer material in the cold from place to place.
Which side should “Isospan A” have?
You may be interested in the question of which side to lay "Isospan A" to the insulation. This material is located on the outside of the wall or roof, after the facing material of the wall or roofing. The rough surface should be adjacent to the thermal insulation, while the smooth one is on the side of the roofing material or the outer wall lining.
Conclusion
It is possible to insulate floors using the Isospan material. Which side to the insulation in this case to lay the material was mentioned above. With the help of this vapor barrier, you can carry out work inside and outside the buildings, the main thing is to figure out which kind of membrane to choose.