Insulation & Air Sealing
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"
If you can't build to stay dry, build to tolerate wet
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
Stop rot with house wrap
Pennsylvania, New York, and Vancouver think so.
Mark the trusses before you unbundle them
Continuous exterior insulation means smaller studs and higher performance