Any formulas available? I have 41/2" wall cavities in an old house. I don't
want to furr out and deal with all the windows and door trim extensions.
Will I get more R value using 3 1/2 (r-11) with a 1" space or should I
compress in 6".
The 3 1/2" Owens Corning insulation I have is R-13, not R-11. The R-19
is 6 1/2" thick (I'm using 6" studs), so you'd have to compress it even
On 09/06/04 04:08 pm calhoun put fingers to keyboard and launched the
following message into cyberspace:
In fact, you may gain insulation value from a slight compression of batt insulation.
A couple of years ago, I asked Journal of Light Construction.
Owens Corning lists these values & thicknesses:
R30 9 1/2"
R21 5 1/2"
R19 6 1/4"
R15 3 1/2"
R13 3 1/2"
R11 3 1/2"
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.