Closed-cell spray foam vs. high density batts
We’re currently in the planning/permitting phases of a new home in the Southeast. We’ve hired a green building specialist to give us some specific recommendations and model our home to give us an approximate hers rating. He has advised that we use high density fiberglass batts in our mostly cathederalized ceilings upstairs. Our contractor (traditional) has recommended closed cell spray foam because he thinks it will help with the structure and have less air permeability. There’s a definite cost difference. Please help steer us in the right direction. FYI it’s a basic gable roof with two dormers and 1×10 rafters. Also we’re having our hvac system in the “attic” unused part of the upstairs. Am I correct in understanding that we should NOT have vented soffits and should encapsulate our entire roof/attic?
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