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


--

Ray Barkalow - First Rays Orchids - www.firstrays.com
Plants, Supplies, Books, Artwork, and Lots of Free Info!

.. . . . . . . . . . .
"Rob Halgren" wrote in message
...
Since you are in the great white north, you might want to build a

solid, insulated north wall.



I might suggest a close look at double wall polycarb panels
considering the great white north location, bwdik. I can highly
recomend the polycarb panels.

bb


Actually I was planning on using my 30x40' pole barn as a north
wall. So that is covered. Not insulated, but I may add some thermal
mass to it. I'd just as soon use triple wall as anything else, but I
may go with inflated poly. Somebody told me that inflated poly has an
R-value better than the walls of most houses up here. My main concern
is heat. Has anybody used a hot water system?

Rob

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