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"
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
Everything* you need to know about adding insulation to the outside of old homes with cold bones
Mark the trusses before you unbundle them
An item on the Energy Star Thermal Bypass Checklist. Item 5.1.2, to be exact ...
For cutting rockwool insulation, retire your old bread knife and pick up a pair of these
Rinse off with cold water before the hot shower.