A little-known but extremely effective product of HENKEL and we at Profil Group recommend the installation of a hydro-insulating tape on each window. And while the focus is mainly on the type of thermal insulation material of window and its thickness in the walls, as well as on other relatively minor details, even the specialists miss something very substantial – the heat losses due to infiltration of air or more readily caused by penetration through the windows and doors of cold air in the rooms and flow out of the hot air due to lack of tightness.
In old windows this problem is extremely serious, because the sash itselves do not seal well to the frames. With the new windows with a factory-fitted quality seal on the sash and the glazing, this problem does not exist. The other one, however, is the poorly sealed joints between the frame and the wall. The fact is that this problem is underestimated, including when installing new joinery.
The solution to the problem is not so simple, especially in the long run, because the boundary between the frame and the wall, including when the facade has a thermal insulation, is always critical and if no special measures are taken, the time between them will inevitably open and gradually Expands the joint. The reason for this is the unequal coefficients of linear expansion of the different materials.
Through the cracks, apart from the increase in heat costs due to infiltration of the air, thermal insulation begins to penetrate moisture, which gradually compromites it.