Marma Polish Films Sp. z o.o.

A very low vapour-permeability is the result of sealing by means of dusting aluminium. It is extremely important in all the applications where maximum sealing of the wall barrier must be obtained. It applies to all the roofs and stud walls which cannot be ventilated due to many different reasons. Such situations occur in cases of roofs and walls being repaired, in which it is impossible to create ventilation of the cover or elevation. Thanks to the dusted aluminium, vapour-insulation acts like a mirror reflecting sun rays. It is crucial for the rooms which are heated by means of the appliances which emit large quantities of heat radiation. The heat spreads through the rooms as radiation, which can be reflected by the mirror surfaces. Application of this type of vapour-insulation under the drywalls contributes to some energy savings, because its surface reflects the amount of radiation which penetrates under the drywalls.

Thanks to their high mechanical parameters, MAX vapour-insulation films can be applied also in every place where the thermo-insulation has to be retained in the relevant distance from the boards acting as finishing of the rooms (drywalls, panelling). It is very important in roofs and stud walls where the loosely applied thermo-insulation stretches regular vapour-insulation for many years, which results in appearance of bulges and voids, increasing the losses of heat. Keeping thermo-insulation in the same place for a long period of time demands very good resistance from vapour-insulation which remains in contact with thermo-insulation and supports it at the same time. In longer periods of time, light thermo-insulation moves and subsides due to vibrations and stresses caused by wind to the construction of walls and roofs.