Insulation & Air Sealing
Simple upgrades to steps you take anyway can significantly boost the energy performance of a home
The first layer of foam is mostly an insulation layer; the outer layer is the air barrier and drainage plane. This video is about the first layer.
A saw and a knife that cut rockwool insulation like a "laser"
Turns out, ducts buried under insulation actually can work to save energy and eliminate condensation inside the ducts. If you seal and insulate them first
Pennsylvania, New York, and Vancouver think so.
Continuous exterior insulation means smaller studs and higher performance