architect
Silver Member
- Joined
- Feb 15, 2005
- Messages
- 137
- Location
- Western PA
- Tractor
- Kubota B1750, traded, L3010 sold, B2920, Mahindra eMax 25
Don't vent the attic, codes allow you to spray foam the sheathing and walls, about 1 inch thick, will seal the house against air infiltration, venting was invented for fiberglass insulation which needed to have a way of removing water vapor removed because it lowered the r value. Use Celulose or foam or mineral fiber as the insulation in addition to the 1 inch foam. Don't fall for the fiberglass hype, r-19 at 70 deg. equals r-6 at 0 deg., not true with other insulations.