Vented crawl spaces, Better: r-30, Best: r-36 – Roxul ComfortBatt User Manual
Page 22
Better
|
Best
22
Better:
R-30
2 x 10 Joists + CB R-30
(or attach 1 x 2 furring/strapping strip to
2 x 8 joist to build up the joist cavity depth)
1
Vapor Control Layer
*
2
2 x 10 Joists
3
ROXUL COMFORTBATT
®
(R30)
4
Foundation Wall
Best:
R-36
2 x 10 Joists + CB R-30 + CB IS R-6
(or attach 1 x 2 furring/strapping strip
to build up the joist cavity depth)
1
Vapor Control Layer
*
2
2 x 10 Joists
3
ROXUL COMFORTBATT
®
(R30)
4
ROXUL COMFORTBOARd
™
IS (R6)
5
Foundation Wall
Vented crawl spaces.
*Check with your state/municipal building code for approved vapor barrier/retarder information.
1
1
3
3
4
5
2
2
4