Cellulose Insulation in Unvented vs. Vented Attic
This is a very air-tight house my wife and I have built.
We installed greenfiber cellulose insulation this past winter and now find that the attic is extremely toxic with off-gassing now that its hot outside. After reading, it seems that if there is any moisture on the cellulose, the heat creates the off-gassing of the borate.
the technical, its a 38X8 12/12 space in the attic which is currently unvented. I am hesitant to vent due to how tight the house is already. If i did vent the attic, the smell would just come straight down into the house every time the bathroom fan is on. Even now, if the windows are closed and the bathroom fan goes, it struggles and the smell from the attic comes into the house.
this is only a 20X38 house with a 4ft knee wall full upstairs, no dormers.
Any advice would help, this is not good for living in this space!
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