Still looking into the issue of possible “mold” in the attic and our options. So I’m wondering – besides noise – what other problems would there be if the steel roofing (it’s screwed down) was removed and the old sheating and shingles thrown out. Then 2x4s would be placed horizontally on the rafters and the steel roofing screwed back down.
This is in VT.
Replies
The attic can de-pressurize relative tot he windward exterior during a blizzard and draw light powder snow through the laps on the steel roofing if it is 5-V type or almost anything other than standing seam. this later collects and melts in your attic causing mold. you want a barrier between the roofing and the attic.
------------------
"You cannot work hard enough to make up for a sloppy estimate."
How would you rate the moisture generating nature of the house. Have you measured the relative humidity? A concern would always be the condensation issue of such a roof. There are a lot of factors to be considered.
I had a house once that had a slight mold smell. Not a big one, just barely noticable.
By the time I got to the last part of the remodel - replacing the roof with ceement tiles - we stripped the entire roof off to the rafters. That exposed a lot of areas completely unaccessable otherwise. In those areas, the rat cr@p, dead creatures, and moldy insulation was quite evident. Removing all that, and vacuuming those areas before replacing the insulation with the wrapped stuff (the moisture was coming from humidity entering the soffit vents - CA coastline) completely solved the smell.
But it was expensive and I had to do the cleanup myself.
You'll need to check your local enforcement authority, of course, but in my area residential structures with nonstructural metal roofing need to be sheeted beneath the steel. Usually OSB with 1x strapping, felt, then steel.
j