Unirac requires an expansion joint every 45 feet. You leave 1/2 inch between rails ends and use a splice bar (not a splice plate). Just use two screws on ONE side of the splice bar. Don't put a module over the splice. Don't forget about rail grounding across the splice.
Anyway, if it is an expansion/contraction issue and you don't have an expansion plate, you might look at how tight your feet are bolted to the rail. A loose one might be slipping. However, I can't imagine it would expand/contract enough to make a noticeable and sustained noise that the customer would complain about. I'm guessing it's something else. I doubt it's the solar. Keep us up to date! Jason Szumlanski Fafco Solar -----Original Message----- Message: 5 Date: Mon, 30 Aug 2010 08:29:51 -0500 From: <[email protected]> To: "RE-wrenches" <[email protected]> Subject: Re: [RE-wrenches] roof noise after solar install. Message-ID: <bfa333d4f642410fafb8d3dfb4f24...@holtpc> Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Not looking at Unirac's install manual, but I'm pretty sure it says something like "expansion joint may be required in run of 30' or longer"....I'm guessing that means one per 30' run....I would verify with them......they have expansion joint plates. Holt E. Kelly Holtek Fireplace & Solar Products 500 Jewell Dr. Waco TX. 76712 254-751-9111 www.holteksolar.com _______________________________________________ List sponsored by Home Power magazine List Address: [email protected] 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
