Hi,
My basement has 2" XPS foam against the concrete walls (glued and taped and sealed), with a 2x3 stud wall over that. Can Roxul 3" batts be squeezed i nto a 2x3 stud wall? Or will that just be an impossible situation and break the 1/2" sheetrock to be intalled over the whole thing?
I have no prior experience with Roxul, so any knowledgealbe comments are gr eatly appreciated.
Thanks Theodore
Stud wall tight against the foam?? We set the stud wall about half an inch from the foam, framed with
2X4, and installed Roxul. It in not terribly hard to compress but not sure how it is sized - I thought 4 inch was for 2X4 (3.5") so 3" would be for 2X3 (2.5"), which would mean "no problemo"
I believe if compressed it'll lose R value. Snug fit is best.
It will lose SOME R value, but it is not linear with the percentage od compression - and not as serious with roxul as with some other insulations.
Ever work with Roxul? Ever try to split it? It's a lot different than fiberglass.
On 09/18/2015 10:14 PM, snipped-for-privacy@snyder.on.ca wrote: ...
Product sheet indicates the 2.5" product is produced in 16-1/4" width for metal studs instead of 15-1/4" width (wood studs). So, _might_ have to trim width with it...I'd guess a full inch compression would not be best use of insulation $$ although having not used it no idea just how hard it would be to install. Couldn't find any data on actual compression ratio vs resultant R value for it...
Not impossible to cut, but extremely difficult to split a 4 inch batt into 2 2 inch batts. It isn't in nice neat layers like (most) fiberglass.
True. Roxul manufacturer replied to me in the same manner: use the 2.5" product and just trim the width to accomodate 16" o.c. studs.
Their additional concern was that if I compressed a standard batt, it might pop out the sheetrock (in the long run).
HomeOwnersHub website 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.