1. MoisTURe management

2. Code Minimums for Exterior Foam
Zone 6
2x4 walls: R-7.5
1.25” R-6/in
1.875” mineral R-4/in
2x6 walls: R-11.25
1.875” R-6/in
2.812” mineral R-4/in

4. GWP

5. Source: Avoiding the Global Warming Impact of Insulation
Posted June 01, :20 PM by Alex Wilson, buildinggreen.com

7. Interior Management Strategies
Dehumidifiers
Bath fans
Range hoods
Sump pits
HRVs/ERVs
Target: < 45%

9. Exterior Management Strategies
Overhangs
Gutters
Rainscreens
Thick foam and NO POLY
Plywood

10. When walls go bad.

11. Follow These Guidelines:
Air leaks are bad.
Air-permeable insulation is risky.
The thicker the wall, the colder the sheathing, and the riskier your wall.
Rainscreens are good GREAT.
Avoid OSB if possible where it’ll get wet.
Exterior foam? Make it thick.
Reverse laps are bad.
Source: How Risky Is Cold OSB Wall Sheathing?
Posted on Nov by Martin Holladay, GBA Advisor