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Re: GBlist: Recycled XPS
Mike O'Brien wrote:
>As I recall, the ASTM C 578 standard for EPS boards defines Types I through
>IX, with the basic difference being density. A Type I board is 0.9
>lbs./cu.ft., a Type II is 1.35 lbs./cu.ft., and so on. As the density
>increases, so does the R-value. Type I is R-3.6 per inch at 75F, and Type
>II is 4.0 per inch. More density also improves the compressive strength and
>bearing ability. Type I is 1440 lbs./sq.ft. and Type II is 1872
>lbs./sq.ft., which makes it suitable under slabs (by our code anyway).
>
Now hold on, Mike. Are you telling us that you "recall" all this stuff? I'm
impressed. Now you didn't peek at the standards did you? Now I know why I
decided not to become an architect.
Keep it up!
Alex Wilson
Truth in GBlist Posting Police
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