jtpr wrote:
On Dec 3, 9:50 am, dpb wrote:
jtpr wrote:
I'm getting ready to do the exterior walls in my garage (workshop)
here in the Portsmouth, NH area. I'm going to use R-19 exterior (2x6
walls) for the insulation. But I was thinking, they have this silver
pegboard at HD that would be kind of cool to use. My question is how
much of a loss would I suffer if I JUST used the pegboard and skipped
the sheetrock (1/2") altogether? The garage will be heated. The
dimensions are 20x20x11 and it is new construction.
To amplify Leon's answer -- the R-value of sheetrock is pretty minimal
(only a few tenths) but do be sure you have a good windbarrier. Should
have one on the exterior, of course, if the builders didn't tear it full
of holes and did a good job of it. Wouldn't hurt to add an interior for
certain.

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I thought about the wind barrier thing a bit, but the workshop is in
the back of the house, it is new and covered in Tyvek (sp?) and Hardi
Plank siding. I am going to use 5/8 sheetrock on the ceiling with
insulation above it. This is really only for three walls, one of
which has the garage door in it, and the other has 4 large windows in
it. ...

The most additional "bang for the buck" would undoubtedly be in an
insulated door and better windows if either or both are not presently.

The floor slab is a big heat sink as haller notes if there's not been
any consideration of doing something there...

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