Ray wrote:

Rob,

According to the manufacturing data I received about a year ago, the
R-values a

6-mil polyethylene 1.15
6-mil polyethylene double layer, inflated 0.70
Glass 1.13
"Fiberglass" or corrugated polycarbonate 1.20
Multiwall polycarbonate 4 mm 0.70
6 mm 0.65
8 mm 0.62
16 mm 0.40



Isn't R value better the higher it is? Seems like this is on an
inverse scale. Anyway, according to this 16mm multiwall polycarbonate
is the best. Am I reading that right? If twin/triple wall is as good
or better than inflated poly, it seems like a no brainer in terms of my
construction skills - panels are easier for my intended design. I had
always assumed inflated poly was the best for insulation.

Thanks for the info.

Rob

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