How bad is fiberglass?
1. I am adding a full dormer framed with 2x12's in zone 6. I am planning to put 6" of iso on the decking and 3" on a small addition created walls. Should I reuse the fiberglass or install wet spray cellulose? Money is a concern but not to the point of short-cutting.
2. I want to upgrade the other side, but for trim and OK roofing, want to keep it vented by cobbling reclaimed iso as a baffle, filling 2x8 and adding 4" iso to the bottom of the rafters. Is this a problem as long as it is isolated from the back?
3. Is Tyvek or 3M tape good enough for taping iso? Different answer for reclaimed?
4. When you strap across the rafters, you create a space the thickness of the material, does perimeter sealing of roof plane make this not a problem for moving air?
Thanks, and this a great site, problems or not.
Posted Wed, 01/01/2014 - 12:28
Edited Thu, 01/02/2014 - 06:45
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