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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.

Nick


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
6X12  $16.98

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
 darrylvan wrote:


   Don't use it. You'll want UV coated.  Home Despot carries SunTuf.

   Jeff


Posted by Gary on September 28, 2006, 2:25 pm
 darrylvan wrote:

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
corrugated.
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).

Gary



--


Gary

www.BuildItSolar.com
gary@BuildItSolar.com
"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




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