I have found a dab of silicone caulk/glue on the threads usually prevents repeated backing out.
Todd On Friday, September 25, 2026 12:38pm, "Ray Walters" <[email protected]> said: Here at 8000 ft in Colorado, and back in my days in New Mexico, I regularly found the roof screws came loose. My neighbor has the local roofing company come out every year to tighten them. I thought it might be due to wind vibration, but Tyrone's theory that its thermal expansion/ contraction checks out. If your client wasn't diligent on checking and tightening loose screws, it could certainly grow into a bigger problem. I'm pretty sure retightening is part of the manufacturer's maintenance recommendations. Even 5/16" lags will work loose occasionally. We still like our metal roofs, because they shed snow, hold up to the UV radiation, and are fire proof. Ray Walters Solarray, Inc. On 9/25/2026 1:16 PM, Tyrone Houck wrote: Yep. Delta Rib/trapezoidal roofing with exposed screws is notorious for screws slowly backing out over time and progressing into rot spots and leaks especially at higher altitudes with seasonal snow/freeze and warm summers. My guess is your attachments are less likely to be the issue than the roof fasteners. Best of luck in your investigation! On Fri, Sep 25, 2026, 11:35 AM William Miller <[ [email protected] ]( mailto:[email protected] )> wrote: Colleagues: I have a long-time PV client with a metal roof. This is the type of roofing with trapezoidal ridges every 12 inches. Over the years we have installed three phases of solar on this roofing. We original caulked DPW feet onto the roof with fasteners into the framing. Later we used DPW EZ-feet with the included butyl tape. The client informed me that have had minor roof leaks due to failure of the fasteners. To quote: “Unfortunately I chose the less expensive version of the roofing, way back then. It has “exposed fasteners”, the screws and washers are working loose.” (No one has claimed our attachments are leaking but you can bet I will be looking at them closely.) This is the first time I have ever heard of this type of failure. Have any of you experienced this? Can you offer any explanation on what caused this and how you dealt with it? I would be very grateful. It seems to me that replacing the fasteners would invite stripping of the threading into the wood sheeting. Thanks in advance, William William Miller Miller Solar [ www.millersolar.com ]( http://www.millersolar.com/ ) CA License C-10 77398 _______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: [ http://re-wrenches.org ]( http://re-wrenches.org ) List Address: [ [email protected] ]( mailto:[email protected] ) Change listserver email address & settings: [ https://lists.re-wrenches.org/mailman/options/re-wrenches_lists.re-wrenches.org/ ]( https://lists.re-wrenches.org/mailman/options/re-wrenches_lists.re-wrenches.org/ ) There are two list archives for searching. When one doesn't work, try the other: [ https://www.mail-archive.com/[email protected]/ ]( https://www.mail-archive.com/[email protected]/ ) [ https://lists.re-wrenches.org/pipermail/re-wrenches_lists.re-wrenches.org/ ]( https://lists.re-wrenches.org/pipermail/re-wrenches_lists.re-wrenches.org/ ) List rules & etiquette: [ http://www.re-wrenches.org/etiquette.htm ]( http://www.re-wrenches.org/etiquette.htm ) Check out or update participant bios: [ http://www.members.re-wrenches.org ]( http://www.members.re-wrenches.org ) _______________________________________________List sponsored by Redwood AlliancePay optional member dues here: [ http://re-wrenches.org ]( http://re-wrenches.org )List Address: [ [email protected] ]( mailto:[email protected] )Change listserver email address & settings:[ https://lists.re-wrenches.org/mailman/options/re-wrenches_lists.re-wrenches.org/ ]( https://lists.re-wrenches.org/mailman/options/re-wrenches_lists.re-wrenches.org/ )There are two list archives for searching. When one doesn't work, try the other:[ https://www.mail-archive.com/[email protected]/ ]( https://www.mail-archive.com/[email protected]/ )[ https://lists.re-wrenches.org/pipermail/re-wrenches_lists.re-wrenches.org/ ]( https://lists.re-wrenches.org/pipermail/re-wrenches_lists.re-wrenches.org/ )List rules & etiquette:[ http://www.re-wrenches.org/etiquette.htm ]( http://www.re-wrenches.org/etiquette.htm )Check out or update participant bios:[ http://www.members.re-wrenches.org ]( http://www.members.re-wrenches.org ) Sent from Finest Planet WebMail.
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