Nick We not only use roofing nails at the bottom corners of metal flashing but sealant around the top and side edges of the face down side. It keeps potential water seeping from uphill away from the lag penetration[s]. We also seal around every shingle edge we pull up or trim off around the flashing. In the words of Mark Graham Assoc. Executive Dir of the National Roofing Contractors Assoc emphasized in his presentation at the AEE conference in Feb, anything less "...is installing roof leaks." Yep, it's more work than slapping down L-feet, about 5 minutes per standoff start to finish, but metal flashed standoffs are the only way we'll attach PV on 3-tab asphalt roofs. It's often as time consuming finding the rafters as it is mounting the footings and flashing. ....my $0.02 [compounded over 20 years]
Jim Duncan NABCEP Certified Solar PV Installer No.31310-57 TECL 27398 North Texas Renewable Energy 486 W.N. Woody Road Azle Texas 76020 Since 1993 nt...@1scom.net 817.917.0527 www.ntrei.com -----Original Message----- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org]on Behalf Of Nick Soleil Sent: Tuesday, July 27, 2010 9:47 PM To: RE-wrenches Subject: Re: [RE-wrenches] Flashings- to nail or not to nail HI Wrenches: My crew wants to nail all the flashings on our footings, but I am resisting. Do you guys have any strong feelings about that. Nick Soleil Project Manager Advanced Alternative Energy Solutions, LLC PO Box 657 Petaluma, CA 94953 Cell: 707-321-2937 Office: 707-789-9537 Fax: 707-769-9037
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