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  1. #1
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    Solar install and other roof fasteners

    So after writing to GD asking questions about the roof on my 2019 Reflection 303 RLS , i did get a drawing sent to me showing where the roof truss spacing and where the AC venting goes. i never did get my other questions answered and I know some of you have done roof projects.

    i want to add solar panels. Can anyone tell me the thickness of the roof material on these roof systems? I assume plywood under the roof membrane. Recommended screws or fasteners? Of course thinking stainless steel, but i have heard of thin roof material needing expansion bolts as fasteners.

    Any tips of help appreciated. I am also putting a 1 1/2" hole to mount a cellular antenna shaft and cable drop to cell router, plus some type of solar PV wire drop from the roof into the coach so type of fasteners is needed. If it is at least 1/2" plywood or similar, I would guess normal SS screws would work.
    Alan and Paula
    2019 Reflection 303 RLS, 2004 Dodge 3500 5.9L
    Magnum 2k watt inverter-charger, 300 AH Battle Born battery bank, solar off grid power.

  2. #2
    Seasoned Camper Grandesigner's Avatar
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    I used 1" long 1/4" lag screws with washers to hold my panels down, followed by alpha self leveling sealant. No issues so far although one of them didn't get much purchase for some reason...
    Dan and Rita
    2021 Reflection150 260RD, built June 2020, w/400W solar + 2 size 31 AGMs added
    Y2K F250 SuperCab 7.3 PSD 4x4, 4 Speed Auto, Shortbed w/slider (never used it)

  3. #3
    Big Traveler geotex1's Avatar
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    You can answer your own question about the decking thickness probably the easiest. Pop down the inside lens of your skylight. Should be able to tell then for sure. Also, zinc-plated fasteners will grab onto lap sealant better than stainless.

    Good luck with your install!
    Rob & Nikki + Cloverfield
    2020 Grand Design Solitude S-Class 3350RL
    2015 RAM 3500 Longhorn Laramie Crew Cab, Long Bed, 4x4 Dually Cummins/AISIN

    Mountains of Pennsylvania

  4. #4
    Site Sponsor Crazybanshee's Avatar
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    The roof is probably 3/8 plywood. I used 1/4 x 1 lags and put dicor under the mounts then over the lags on top. I run 75 mph in to some strong headwinds. Never an issue in twelve years.
    2007 Volvo 780 VNL Trailersaver Hitch
    2017 Momentum 397th
    2015 Polaris RZR 900S Voodoo Blue
    2017 Polaris RZR S1000 Matte Black
    2019 Polaris RZR S1000 Titanium Matte
    3 Yamaha Banshee's 2-Honda 400 EX's
    Honda 250EX 2016 Polaris Outlaw 110 EFI

  5. #5
    Site Sponsor
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    Thanks for the replies everyone. I start drilling today. Crazy Banshee, Nice set up! Do you spend anytime in CRA Emerald cove during the winter? I've seen a rig and trailer that looks like yours there.
    Alan and Paula
    2019 Reflection 303 RLS, 2004 Dodge 3500 5.9L
    Magnum 2k watt inverter-charger, 300 AH Battle Born battery bank, solar off grid power.

  6. #6
    Site Sponsor Crazybanshee's Avatar
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    Quote Originally Posted by deerislandbrew View Post
    Thanks for the replies everyone. I start drilling today. Crazy Banshee, Nice set up! Do you spend anytime in CRA Emerald cove during the winter? I've seen a rig and trailer that looks like yours there.
    Nope never been there
    2007 Volvo 780 VNL Trailersaver Hitch
    2017 Momentum 397th
    2015 Polaris RZR 900S Voodoo Blue
    2017 Polaris RZR S1000 Matte Black
    2019 Polaris RZR S1000 Titanium Matte
    3 Yamaha Banshee's 2-Honda 400 EX's
    Honda 250EX 2016 Polaris Outlaw 110 EFI

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