Eric, Locate a reputable roofer experienced with the roof type you are dealing with and sub them to install stand-offs for you, once you determine the array layout. This will save you alot of time and grief, and you will know that the job was done right. Unless you really want to learn the finer points of penetrating and waterproofing a flat tar and gravel roof ....not for me. or...Do you have the option of using a ballasted array. Of course, have the design OK'd (stamped?) by an engineer. There's lots of wind loading with a tilt up array on a flat roof. benn DayStar Renewable Energy Inc. benn@daystarsolar.ca780-906-7807 HAVE A SUNNY DAY
Date: Thu, 14 Apr 2011 14:08:39 -0700 From: solarepiph...@gmail.com To: re-wrenches@lists.re-wrenches.org Subject: [RE-wrenches] Tar and Gravel Roof Moint Anyone have experience mounting a tilt up array over a tar and gravel roof? Weatherproofing, best practices for finding rafters, type of standoffs etc. The residential roof in question has over 3" of tar (!) so im thinking 6" stanchion to tilt legs. Any ideas or lessons learned would be helpful. Thanks, Eric Thomas Solar Epiphany Seattle NABCEP Certified PV WA Electrical Contractor SOLAREL911NR _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
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