Type "A" or "B"
Hello to all the readers and the channel build-built
and log Glavpostroy!
IN This article will tell you about the fundamental difference between the two types of vapor barriers, which are to supply one of the first manufacturers started to be labeled as "A" and "B".
ANDso first of all, in spite of all the skeptics will say that the difference between the films (membranes) is, and it is very important:
Film type "B" designed to be mounted on the inside of the house (between the skin and insulation). Remember, this tape has differentsides: One - is rough to the touch, the second - perfectly smooth. So, the main rule - rough film "looks" at home - on her villi will linger pairs of the house, and then it will slide down on it without soaking the insulation.
But the film type "A" designed for outdoor installation - this is the last milestone before the outer skin or siding. This film the same on both sides! Accordingly, there is no difference, as it is sewn to the frame.
Helpful advice:
Before mounting the film type "A" look in which direction it is convenient is unwound from the roll. That and attach it to the wall framing.