I had a person contact me years ago who said her solar installer put a system up that caused popping noises everyday on her roof. It was a shingle roof, older home, and ultimately we chalked it up to expansion and contraction. Everything was secure and there were no indications of structural, cosmetic, or waterproof integrity being jeopardized.
That was my only experience with this issue until we did a recent installation on a 5V exposed fastener metal roof using S-5 SolarFoot mounts attached through the metal into the plywood decking only. This new client is reporting numerous loud popping sounds every day. Based on the time of day and weather, it must have something to do with expansion and contraction, but we cannot pinpoint the problem. Of course, the day we go to try to duplicate the issue, there were no sounds at all that we could detect up on the roof after waiting hours in observation. We did have one row of 13 panels mounted in portrait that was on the longer side, so we decided to split the rail by putting a gap in the middle. That, apparently, has not solved the issue. We have checked the torque on every single fastener in the system. This installation is no different than many many others we have done using the same materials on the same roof type. Has anybody experienced similar issues, and how did you go about addressing them? Jason Szumlanski Florida Solar Design Group
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