permaculture

["Scott Pittman" <scott@permaculture.org>]

I have had GE Polycarbonate double glazed sheets on the roof of my Atrium
for 12 years and they have not discolored and have served us great.  They
cover an area that is 16ft X 8ft and work very well.

Scott Pittman

"Another world is not only possible, she is on her way. 
On a quiet day, I can hear her breathing." 
~Arundhati Roy

-----Original Message-----
From: permaculture-bounces@lists.ibiblio.org
[mailto:permaculture-bounces@lists.ibiblio.org] On Behalf Of John D'hondt
Sent: Sunday, January 13, 2013 5:08 PM
To: permaculture
Subject: Re: [permaculture] Double pane plastic windows?


I don't know anything about your specific plastic windows but most all clear

plastic will turn opaque in sunlight. I can't immagine you will have a clear

outlook for ten years and possibly a good bit shorter if the plastic is not 
specially UV protected.
John

We just found an extremely cheap source for insulated plastic windows 
(double pane).

My questions is: Does anyone have experience with using these? Especially 
versus glass?

I cannot find much infomation on their efficiency letting light in, 
retaining heat, etc.
We cannot afford a glass greenhouse right now, but if the drawback of 
plastic windows are relatively small we might piece together one.

Thanks all.
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