Due to aesthetics, R-20 (4 1/2 inches of rigid foam) above the roof is my limit
Due to aesthetics, R-20 (4 1/2 inches of rigid foam) above the roof is my limit. Would Roxul plus an airspace in the rafter bays be a good choice for the remainder of the needed R-value?
Jesse, 80% of home is concrete slab with remaining 20% being crawl space I closed in - conditioned basement. In a high water table area with no vapor barrier under slab or crawl. De-humidifier runs constantly.
I plan to include air space in rafter bays under sheathing along with batt insulation for remainder of needed R-value. Is an airspace necessary with R-20 foam above roof sheathing?
Asked by cameron morris
Posted Tue, 07/01/2014 - 09:31
Edited Tue, 07/01/2014 - 10:34
Posted Tue, 07/01/2014 - 09:31
Edited Tue, 07/01/2014 - 10:34
Yahoo
Technorati
Google
Facebook
Delicious
Digg
StumbleUpon
RedditOther Questions in Green building techniques
In Green building techniques | Asked by Eric Stear | Jul 31, 14
In General questions | Asked by mark mahon | Aug 1, 14
In Energy efficiency and durability | Asked by Brett Sichello | Jul 31, 14
In Interior design | Asked by Adam Lawrence | Aug 1, 14
In General questions | Asked by Chuck Jensen | Aug 1, 14
Cameron,
It looks like you intended to post this on a different page. In most cases, it makes sense to maintain just one thread for a series of questions, rather than starting a new thread each time.
Here is a link to the original thread:
http://www.greenbuildingadvisor.com/community/forum/green-building-techn...
It would be a good idea to post all answers back on that page.
Posted Tue, 07/01/2014 - 10:36