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Roof Noises after Installation

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  • #16
    [USER="1076"]Mike90250[/USER] that's what I thought too. Although, I would say the noises are more frequent at heat-up and cools down times. That's totally anecdotal, but now that I am getting some feedback here I may actually measure the time between noises. It does appear that the noises are less frequent on cloudy days (days with less temp variation.)

    Hoping to find some time to post pics and measurements tomorrow.

    [USER="16965"]J.P.M.[/USER] The volume of the noises varies from fairly soft- maybe a tree cracking from far away, to loud, a tree cracking when being cut down. Or yes, door slamming is not a bad analogy.

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    • #17
      Originally posted by pneal View Post
      [USER="1076"]Mike90250[/USER] that's what I thought too. Although, I would say the noises are more frequent at heat-up and cools down times. That's totally anecdotal, but now that I am getting some feedback here I may actually measure the time between noises. It does appear that the noises are less frequent on cloudy days (days with less temp variation.)

      Hoping to find some time to post pics and measurements tomorrow.

      [USER="16965"]J.P.M.[/USER] The volume of the noises varies from fairly soft- maybe a tree cracking from far away, to loud, a tree cracking when being cut down. Or yes, door slamming is not a bad analogy.
      More noise would probably indicate more movement and probably from thermal expansion/contraction causing relative motion of some things or some sections/parts of the same component.
      Id sit on the roof on a partly cloudy day and listen up for noises.

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      • #18
        Hey @pneal, did you ever figure this out? We're having a similar problem that's continuing months after installation, and our installers are similarly stumped. They looked up there once and told us it must be a problem with the roof. I am wondering if we do have a less-than-perfect roof situation going on. The previous owners had it redone in 2015, and we're still occasionally finding random screws/nails on the ground around the outside of the house. I used to think whoever did the roof just didn't clean up well, but the fact that we are still finding bits and pieces makes me wonder if the screws/nails are coming out over time.
        Last edited by NancyAF; 02-18-2020, 05:34 PM.

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        • #19
          My roof makes some noise and has no panels. But you have a before and after, so I don't know.
          Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
          || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
          || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

          solar: http://tinyurl.com/LMR-Solar
          gen: http://tinyurl.com/LMR-Lister

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          • #20
            As reported in my earlier post above, my roof is wood truss supported with plywood decking, 30# underlayment and cement tile. I figured with the different expansion rates between aluminum racking and the wood roof I would hear some noises as the structure warmed and cooled but it's pretty quiet, even at 5+ years later. My house had its own expansion and contraction noises before and after the install but I've heard those in just about every home I've owned. I'm sure some solar installs will end up with expansion and contraction noises when dissimilar materials are mechanically connected.

            Related story...my large screened patio was installed with 10' length dark brown aluminum spline channels using long wood screws every 18" into the painted wood frames. The first few days, when sunlight hit the frames, the expansion force of the warming aluminum eventually overcame to hold down force of the screws and the noise inside the house was so loud it seemed like someone was firing a small handgun in our backyard. It was incredibly loud. I loosened the screws just enough to allow the frames to slip more easily and the noises are now completely gone.
            Dave W. Gilbert AZ
            6.63kW grid-tie owner

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            • #21
              Hopefully your house isn't built on sacred burial ground.
              2.2kw Suntech mono, Classic 200, NEW Trace SW4024

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              • #22
                Do you have any type of insulated panels under your shingles? If the noise is mostly happening late morning and less noticeable after the sun goes down is thermal expansion/contraction. If you have any type of polyiso/xps insulated panels, it is because they have been compressed due to the mounting hardware screwed down on roof.

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