MOISTURE MANAGEMENT. Code Minimums for Exterior Foam Zone 6 2x4 walls: R-7.5 1.25” polyiso @...

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MOISTURE MANAGEMENT

Transcript of MOISTURE MANAGEMENT. Code Minimums for Exterior Foam Zone 6 2x4 walls: R-7.5 1.25” polyiso @...

Page 1: MOISTURE MANAGEMENT. Code Minimums for Exterior Foam Zone 6 2x4 walls: R-7.5 1.25” polyiso @ R-6/in 1.875” mineral wool @ R-4/in 2x6 walls: R-11.25.

MOISTURE MANAGEMENT

Page 2: MOISTURE MANAGEMENT. Code Minimums for Exterior Foam Zone 6 2x4 walls: R-7.5 1.25” polyiso @ R-6/in 1.875” mineral wool @ R-4/in 2x6 walls: R-11.25.

Code Minimums for Exterior Foam

Zone 6 2x4 walls: R-7.5

1.25” polyiso @ R-6/in 1.875” mineral wool @ R-4/in

2x6 walls: R-11.25 1.875” polyiso @ R-6/in 2.812” mineral wool @ R-4/in

Page 3: MOISTURE MANAGEMENT. Code Minimums for Exterior Foam Zone 6 2x4 walls: R-7.5 1.25” polyiso @ R-6/in 1.875” mineral wool @ R-4/in 2x6 walls: R-11.25.
Page 4: MOISTURE MANAGEMENT. Code Minimums for Exterior Foam Zone 6 2x4 walls: R-7.5 1.25” polyiso @ R-6/in 1.875” mineral wool @ R-4/in 2x6 walls: R-11.25.

GWP

Page 5: MOISTURE MANAGEMENT. Code Minimums for Exterior Foam Zone 6 2x4 walls: R-7.5 1.25” polyiso @ R-6/in 1.875” mineral wool @ R-4/in 2x6 walls: R-11.25.

Source: Avoiding the Global Warming Impact of Insulation Posted June 01, 2010 03:20 PM by Alex Wilson, buildinggreen.com

http://www2.buildinggreen.com/blogs/avoiding-global-warming-impact-insulation
http://www2.buildinggreen.com/blogs/avoiding-global-warming-impact-insulation
Page 6: MOISTURE MANAGEMENT. Code Minimums for Exterior Foam Zone 6 2x4 walls: R-7.5 1.25” polyiso @ R-6/in 1.875” mineral wool @ R-4/in 2x6 walls: R-11.25.
Page 7: MOISTURE MANAGEMENT. Code Minimums for Exterior Foam Zone 6 2x4 walls: R-7.5 1.25” polyiso @ R-6/in 1.875” mineral wool @ R-4/in 2x6 walls: R-11.25.

Interior Management Strategies

DehumidifiersBath fansRange hoodsSump pitsHRVs/ERVsTarget: < 45%

Page 8: MOISTURE MANAGEMENT. Code Minimums for Exterior Foam Zone 6 2x4 walls: R-7.5 1.25” polyiso @ R-6/in 1.875” mineral wool @ R-4/in 2x6 walls: R-11.25.
Page 9: MOISTURE MANAGEMENT. Code Minimums for Exterior Foam Zone 6 2x4 walls: R-7.5 1.25” polyiso @ R-6/in 1.875” mineral wool @ R-4/in 2x6 walls: R-11.25.

Exterior Management Strategies

OverhangsGuttersRainscreensThick foam and NO POLYPlywood

Page 10: MOISTURE MANAGEMENT. Code Minimums for Exterior Foam Zone 6 2x4 walls: R-7.5 1.25” polyiso @ R-6/in 1.875” mineral wool @ R-4/in 2x6 walls: R-11.25.

When walls go bad.

Page 11: MOISTURE MANAGEMENT. Code Minimums for Exterior Foam Zone 6 2x4 walls: R-7.5 1.25” polyiso @ R-6/in 1.875” mineral wool @ R-4/in 2x6 walls: R-11.25.

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 5 2010 by Martin Holladay, GBA Advisor

http://www.greenbuildingadvisor.com/users/martinholladay-0

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