The sales program of protective films includes a wide range of specialised films for use on buildings and various roof structures.
Films play a crucial role in protecting buildings from weather conditions and contribute to a favourable climate in living spaces. In addition to improving energy efficiency, they enable long-lasting and effective protection of structures against condensation, water ingress, and air overheating.
Vapour barrier
A vapour barrier completely prevents the passage of moisture through the building structure. This prevents moisture generated in the space due to various activities from penetrating deeper into the roof and insulation, causing condensation. Due to the installation of a vapour barrier, the building does not breathe, so ventilation is important. Proper installation and detailing prolong the lifespan of the structure.
The main purpose is to prevent the entry of vapour and moisture into the insulation, thereby extending the lifespan of the insulation itself. Special attention needs to be paid to detailing. They reduce the thermal losses of the building. They are installed on the inner, warm side of the insulation.
Vapour retarder
A vapour retarder slows down and controls the passage of water vapour through the building structure that borders heated and unheated spaces or the external air. Proper detailing is also important here.
The vapour retarder partially prevents the passage of water vapour. Due to its structure, the foil still allows the structure to breathe and ensures an even passage of water vapour. In this case, the vapour can pass into the thermal insulation, which dries out both towards the exterior and the interior. When installing a vapour retarder, it is necessary to choose the correct combination of the retarder and insulation in order to improve the indoor climate.
Vapour-permeable membranes
Vapour-permeable roof membranes play an important role as a secondary covering in protecting roof structures. They protect thermal insulation and the building itself from moisture that could penetrate beneath the surface of the roof covering. The basic characteristic of a vapour-permeable membrane is to allow water vapour to pass from the interior of the building outward into the ventilated air gap of the roof, without compromising the roof’s waterproofing towards the interior.
They enable the passage of water vapour from the thermal insulation, thereby reducing the possibility of moisture condensation. The vapour permeability of the membrane, indicated by the Sd factor, is important and should be as low as possible.
UV resistance of the membrane is also important, especially during the roof covering phase and protecting the house from rain when there is no roof covering yet.
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