Your guess on R value?


Old 10-20-03, 03:42 AM
teds tools
Visiting Guest
Posts: n/a
Your guess on R value?

WE have a cement block house with dry wall on the inside. I have no idea how much if any insulatoion is behind that drywall. Is a cement block itself any insulation? there is dead air space in it after all. My brother thinks I should tear off all the sheet rock and put up insulation ( we live in Michigan) I think he's crazy. So what is you opinion of the potential R value of the block. The bottom of the house is face stone and the top half is wood siding Thanks Ted
Sponsored Links
Old 10-20-03, 06:12 AM
Join Date: Nov 2001
Location: Taylors, SC
Posts: 9,483
This thread discussed this very question. You might want to take a look.

Hope this helps.
Old 10-23-03, 11:45 AM
Join Date: Apr 2002
Location: Boulder, CO
Posts: 125
Not much

I bet you have insulation behind your drywall, otherwise you'd be running $1000/month heating bills and have ice on your kitchen walls during the winter.

The 8" concrete blocks have an R-value of about 1 (see, which is comparable to that of a single pane window (burr!). You may have some sort of fiber sheathing behind your wood and stone siding, which would add another R-1 or so.

If you aren't insulated inside, almost anything you add will help. You can special-order 3.5" fiberglass batts that have a high R-15 rating. Install between studs and add drywall to get to usual wood-frame house standards. Even if you hire someone to do the work, it will pay for itself in a few years. Adding insulation to the celing/attic is also an excellent investment. R-38 is the current building standard in cold climates.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Display Modes