home insulation

Open Cell vs Closed Cell Spray Foam: What Most Contractors Skip

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Open Cell vs Closed Cell Spray Foam: What Most Contractors Skip

Last spring, I got a call from a homeowner in central Utah — Climate Zone 5 — who was furious. She’d just paid $4,800 to have her attic roofline sprayed with open-cell foam, and three months later she was seeing moisture stains on her rafters. Her contractor had done a beautiful job on the application. … Read more

Why Adding Attic Insulation Didn’t Fix Your Cold Rooms

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Why Adding Attic Insulation Didn't Fix Your Cold Rooms

Last Tuesday, I got a call from a homeowner in South Minneapolis who’d just spent $3,200 having a contractor blow R-60 cellulose into his attic. He was frustrated. His master bedroom was still cold. His energy bill barely budged. And when I climbed into his attic with a thermal camera on a 15-degree January night, … Read more