Posted by nicksanspam on September 28, 2006, 9:20 am
My greenhouse supplier sells 4x12 sheets of single wall R1 Dynaglas polycarb
with 90% solar transmission for $1 and twinwall U0.58 Thermaglas Plus with
80% transmission for $4. GE sells 4'x50' rolls of 10 mil Lexan for $37.35.
Posted by no spam on September 28, 2006, 3:42 pm
A place I deal with via mail order although, I have never bought polycarb
from them, has polycarb for:
10mm 4X8 $9.95 4X12 $04.95
8mm 4X8 $2.49 4X12 $8.59 6X8 $8.59 6X10 $8.25
4mm 4X8 $1.95
"lightweight corrugated polycarbonate sheets"
50" X 8'2" $3.95
50" X 12'2" $4.95
FYI, you get a discount if you buy 50 or more :)
I won't post the name or phone number here unless someone ask.
Posted by Jeff on September 28, 2006, 7:16 am
Don't use it. You'll want UV coated. Home Despot carries SunTuf.
Posted by Gary on September 28, 2006, 2:25 pm
I don't see any reason it would not work just as well for an active collector.
But, I did forget to mention the multiwall polycarbonates. This is what I am
using on my new collectors. I think its a bit easier to work with than the
As has been pointed out, it has somewhat lower transmission, but higher R value
-- might be a better choice for cold climates.
I am just a bit concerned about overheating of the inner layer, and plan to
include some form of venting or shading on mine for the summer (at least).
"Build It Yourself" Solar Projects
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Posted by Solar Flare on September 28, 2006, 11:23 pm
Suntuf is advertised and used for many greenhouses. The heat is not
supposed to be a problem unless, like I did last weekend, hit it with
the flame from a rpopane torch...LOL