I'll second that suggestion--- greenhouse shade cloth is cheaper, and lasts
as long. shading coefficient used depends on how much solar gain reduction
you need. For my office radiant floor collectors-- ground mount, recycled
Reynolds aluminum, anti-freeze --- I cover completely with white,
reinforced, 6 mil, UV inhibited polyethylene vapor barrier. Online source
would be Tek Supply.
Some hardware stores stock Pheifer. Farm supply/ greenhouse supply outfits
would also be a good source for both. Be sure poly is UV protected.
This issue is just another reason to use a DrainBack system when possible.
Ken Schaal
CommonWealth Solar
Ashland Va.
----- Original Message -----
From: "William Dorsett" <wmdors...@sbcglobal.net>
To: <allso...@scswifi.net>; "'RE-wrenches'"
<re-wrenches@lists.re-wrenches.org>
Sent: Thursday, October 25, 2012 11:50 PM
Subject: Re: [RE-wrenches] SDHW collector covers
Jeremy, we used use a screen fabric called Phifer Glass shade screen
(http://www.phifer.com/ExtSunControl.aspx#) which comes in 4' rolls and in
different levels of shading. For vertical collectors we anchored it along
the top of the collector and used awning type pulleys to roll it up on a
bottom rail of 2" PVC pipe filled with sand to give it weight and glued
pipe
caps on the ends. We drilled holes in the caps for eye-bolts to tie them
down so they wouldn't flap in the wind. They worked very well for many
years.
Bill Dorsett
Sunwrights
Manhattan, KS
-----Original Message-----
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Jeremy
Rodriguez- All Solar Inc.
Sent: Thursday, October 25, 2012 9:21 PM
To: re-wrenches@lists.re-wrenches.org
Subject: [RE-wrenches] SDHW collector covers
Anyone have a good product besides plywood for a collector cover? 4x8 ft.
Thx!
Jeremy Rodriguez
All Solar
Colorado, USA
Sent via BlackBerry. Sorry for typos and shorthand!
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