Perm value of 8 inches of open cell foam
How do you calculate the perm value for a given thickness of open cell foam?
I found Open Cell spray foam has a "perm ratings of approximately 16 per 3 inches thickness (up to 30-35 perms at one inch)"
What would be the perm value for 8 inches? I'm trying to find out if 8 inches of open cell foam would be better then 3 inches of closed cell foam for a vapor retarder.
|All times are GMT -5. The time now is 02:54 AM.|
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.