Non-penetrating Roof Rack Ballast Questions [RE-wrenches]

[Bill Brooks]

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Randy,

Standard block pavers (4"x8"x2") have been used for many years by PV and
others with good success. Easy to move around (with gloves of course).

Bill.

-----Original Message-----
From: Allan Sindelar [mailto:allan at positiveenergysolar.com] 
Sent: Friday, November 04, 2005 7:17 PM
To: New wrenches posting
Subject: Non-penetrating Roof Rack Ballast Questions [RE-wrenches]

Hi fellow Wrenches,

I need help with suggestions for ballast material for a non-penetrating,
ballasted flat-roof rack system using UniRac.  The roof pan dimension are 9'
x 4' with the 9' side being the front and back dimension.  The module tilt
angle is 20 degrees, leaving a space available for ballast of between 2" in
the front side to 18" in the back.  I need to add about 600 pounds of
ballast to each rack.  Are there any practical ballast materials I should
consider to do this? What have you used successfully that is permanent,
practical, low-cost, and can be moved easily onto a roof and into place?

Thanks for the help,



Randy Sadewic

randy at positiveenergysolar.com

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