Air-tight drywall and netted cellulose
Western Massachusetts / Climate Zone 5
The rough framing is complete on a double-walled house I am working on, and the insulators will be in to net and install dense pack cellulose next week. Our intent is to caulk or gasket the drywall to the framing at all exterior walls. I met with the drywall contractor this morning, who had never done the air-tight drywall approach. I explained the concept and these were his questions:
1. Is sealing the drywall to the studs necessary when we have netting on all the exterior walls under the drywall. Won’t this act as a type of gasket?
2. Is sealing the drywall to the studs necessary when we are installing blueboard and plaster skim coating the entire house?
3. Is non-paper faced drywall necessary in the finished basement if using blueboard? (The basement 2 x 4 walls are insulated with cellulose and 2″ rigid insulation in front of the foundation wall). The foundation has perimeter drains and spray waterproofing.
Thanks for any advice and Happy New Year!