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Posted by abarr on February 1, 2007, 9:52 pm
The R value of a 2x is about .6/inch So an 2 x 8 would be apx 4.8 R.
If you are that concerned and willing to pay a little more. Move to SIPs or
ICF. Go to www.futurestone.com for info on ICFs
> Out of curiosity (I live in a cold-ish climate, so thicker walls
> strike me as a good idea)
>
> Does anyone do home construction using 2x8 (or two 2x4s)? I haven't
> seen anything like this locally, but that doesn't necessarily mean it
> doesn't exist.
>
> Despite a material cost increase (and larger external footprint
> required for the same internal square footage), wouldn't the increase
> in R-value offset the additional cost over time?
>
> Alternately, assuming 2x6 exterior walls, are any homes constructed
> with additional EPS/XPS insulation on the outside of the wall?
>
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