Good evening, I have been checking out a new build and an attic insulation/renovation. I have the impression that a thinner insulation mat was used, which was coated with a windproof layer. It was this layer that was black and had similar properties to tar paper, which was placed over the insulation in attics and lofts. From what I just believe/thought, this mat protected the underlying insulation from too much wind in cold spaces and unwanted moisture. Do they not use this mat anymore? When building today, can you leave insulation exposed to the cold space? If anyone has a name for the mat I'm rambling about, I'd be happy. Best regards, Hans
I have looked into it a bit myself and found the name "byggmatta", the product has a paper on one side to prevent moving air from drawing out the heat from the insulation (although not black). Taking another chance that someone knows something about this, is this not generally recommended in unheated attics? Best regards, Hans
Member
· Västerbottens län
· 18 054 posts
On my attic, there is insulation with brown paper.
When I asked the loose-fill insulation contractors, they said you just lay slightly thicker insulation to "compensate" for the wind paper.
Protte
When I asked the loose-fill insulation contractors, they said you just lay slightly thicker insulation to "compensate" for the wind paper.
Protte
Hello and thank you for the response, yes apparently other "methods" are chosen to compensate for the loss. It is probably the surface area and how much wind enters the cold space that matter, perhaps part of the compensation lies in "modern" tight/tighter roof constructions. Best regards, Hans O