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Old 12-20-2022, 12:39 PM   #1
rbhtrail
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Default roof leaking

Hello All, 2019 2720 roof leak by ac unit. I recently found a leak coming from the plastic wire chase near the ac unit. I opened up the chase to see a wire hole feeding power to the area near the TV antenna end of the TM's interior roof. Does anyone know if there is an elevation drawing showing the view of the ac units housing, supports and flashing to the roof. I removed the interior ac cover ,inspected to find emitting light from voids of silicone on the roof material. It would be helpful to have an assembly drawing that shows how the ac unit is attached... Thanks much for any help getting the documentation.
Is there any such documentation available ?
Thank You all...
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Old 12-21-2022, 07:07 AM   #2
Shane826
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I don’t have a drawing but… On top of the roof there is a riser made from wa wood or PVC board frame topped with a price of TM wall material. This is screwed to the roof and then siliconed. No flashing. The plastic skirt you see under the A/C sits on top of this riser and then the A/C sits on top of that. The skirt should have a bead of lap sealant sealing it to the top of the roof. The A/C is clamped to the riser, sandwiching the skirt in place, by 4 bolts, 1 in each corner of the riser 14”x14” cutout. There is a foam gasket between the A/C and skirt. Trust me you don’t want to remove the riser. If it’s not lined up just right, nothing else will line up correctly.

Note if you’re getting water in that cable channel on the ceiling take a good look at the seam that runs down the center of the roof. Water in the cable channel tends to be a tell-tale of a leaky center seam. Remove the trim, Eternabond tape over the seam, and new trim if you so desire seems to be the best fix going.
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Old 12-21-2022, 09:20 AM   #3
Shane826
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Here’s a few pics of the riser and skirt disassembled.
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__________________
2007/21 TM 3326 (Pride of the Fleet)
2000 2720SL (Rebuild Project)
2002 2619 (Parts TM)
SMARTER THAN GOOGLE!
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Old 12-22-2022, 11:30 AM   #4
rbhtrail
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Default roof leaking

Thanks for responding with your thoughts and pictures Shane 826. I've yet to have a real good look at all the penetration seals, most have ,I believe Sikaflex either white or black sealant. When the weather warms up a bit this spring, I'll have a real close look at every inch that's caulked.
I'll certainly report the results to the forum.
Thanks again for your help and have a Happy and safe year going forward.
Bob
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