Darryl, No answers. Just questions in search of answers.
Is this a single-layer comp roof? Did the noises begin immediately after the install? Were there any questionable structural issues noted during install? Is it possible that one or more bolts aren't completely tightened? (Take a good look at your footing to rail connections.) Can you get into the attic and inspect the rafters/trusses? (Make sure you don't have a busted rafter) What was the temperature during install compared to normal daytime highs when it's making all this racket? (I've heard of winter-installs making noise during the summer) What does it sound like from outside the house? (i.e. is the pitch or tone of the sounds very different) Can the source of the sound be isolated to one point or region? (i.e. only on the longest rails) What is the temperature range like on the days it's being a nuisance? (i.e. 45-95, or 55-85, etc.) Are these jumbo modules? (large modules have greater absolute expansion between attachments than smaller modules) When you go out there, be prepared to install a pair of expansion splices for each long rail set, but don't expect that to be the silver bullet. Unirac says you only need them every 45 feet. If your situation is under 30', I expect you have another problem. Installation manual here: http://www.unirac.com/pdf/ii908.pdf Pray for silent roofs, Matt Lafferty From: Darryl T Subject: [RE-wrenches] roof noise after solar install. New roof asphalt shingle, 5.1 kW system, string inverter makes roof noises in the morning, and afternoon particularly after dark Creek and crack it finally stops late at night but restarts late morning and stops mid afternoon most days then intensifies after dark. Timing seems to follow temperature, has customer freeked Longest tun is 30 feet Unirack rail with top down clamps. Darryl _______________________________________________ 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
