Is this insulation plan any good?
Here's what my builder is proposing:
R-21 High Density batts covered with .003 plastic for all 2x6 sidewalls.
R- 49 17” fiberglass blown in house ceiling.
R-15 for garage stud walls.
R-19 7’’ blown in garage ceiling.
R-21 Kraft batts for basement stud walls.
Cell foam around all penetrations and box seal.
Tyvek building wrap exterior walls.
I think the 3 mil plastic on the exterior walls is a vapor barrier required by code.
I really have no idea if this is excellent, crap, or somewhere in between (the builder is telling me that this seals the place up tight, but I'd prefer to not just take him at his word). I've heard cellulose is better than fiberglass, but I'm not sure what the tradeoffs are. Overall having trouble finding some good resources to learn about this stuff.
I'm building in central Illinois. Hot, humid summers (typically between 80-100 F with >80% humidity), and pretty cold winters (typically between 0-20F).
Thanks in advance!
Posted May 9, 2014 2:07 PM ET
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