The presence
The seam should be either cleaned at the level of the front surface of the profile, or the groove should be a maximum width of 5 mm, and a depth of not more than 1 mm; The double -glazed window should be intact, there should be no moisture or dirt inside, there should also be no traces of sealant inside the package; the presence of glasses in the double -glazed window: single -chamber - two glasses, two -chamber - three glasses.