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Settle this argument: trailer roof seal
Posted by: deckeda
Date: August 05, 2020 10:13AM
Steel horse trailer
14” roof vent, to be replaced with a new one

I say use dedicated roof sealer you appropriately apply under the flange, screw it down onto the roof as intended, too off screwheads with more sealant. “Someone else” suggests double-sided tape between vent and roof, with a second layer on top of vent flange. Don’t need to use screws.

I maintain the latter method isn’t recommended and will only lead to despair.
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Re: Settle this argument: trailer roof seal
Posted by: C(-)ris
Date: August 05, 2020 10:31AM
I would use a rubber tape/seal between the roof and the vent. If you use roof sealer when you screw in the vent it will cut through the sealer and you may have metal on metal contact. I would NOT use a second layer, that WILL cause problems.



C(-)ris
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Re: Settle this argument: trailer roof seal
Posted by: btfc
Date: August 05, 2020 11:33AM
Your way; you can use sealer or tape beneath the vent flanges, but then screws and roof sealant.



Edited 1 time(s). Last edit at 08/05/2020 11:36AM by btfc.
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Re: Settle this argument: trailer roof seal
Posted by: mikebw
Date: August 05, 2020 12:14PM
Never heard of using double sided tape for a water seal.

I vote for your method, using stainless screws.
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Re: Settle this argument: trailer roof seal
Posted by: btfc
Date: August 05, 2020 12:24PM
Not regular double sided tape, sealant tape for roofing applications, usually butyl, comes single or double sided.
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Re: Settle this argument: trailer roof seal
Posted by: cbelt3
Date: August 05, 2020 12:48PM
Tape ? For a moving vehicle ? Yeah no.
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Re: Settle this argument: trailer roof seal
Posted by: deckedasso
Date: August 05, 2020 09:10PM
Quote
btfc
Not regular double sided tape, sealant tape for roofing applications, usually butyl, comes single or double sided.

Yes. This. The product is Eternabond, or something like it. The idea is to secure the fan to the roof with the double-sided tape (instead of screws), then seal the whole assembly with the single-sided tape that is often used for this purpose anyway.

I maintain that Deckeda’s more traditional method has been proven to have problems (hence we have to fix it).


“Someone else”



"Adults are always asking little kids what they want to be when they grow up because they're looking for ideas." ~Paula Poundstone
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Re: Settle this argument: trailer roof seal
Posted by: jdc
Date: August 05, 2020 10:14PM
What? no flex seal option? =)



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Edited 999 time(s). Last edit at 12:08PM by jdc.
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Re: Settle this argument: trailer roof seal
Posted by: bobinmurphy
Date: August 06, 2020 07:18AM
Dicor, available from RV shops and supply stores. It's what they use to seal things on RVs and comes it two flavors - regular and self-leveling. Only use the self-leveling on horizontal surfaces! It seals and sticks like crazy - to remove it you have to scrape it and clean the surfaces with something like WD-40.

RV manufacturers even use it to glue down things on roofs like solar panels.
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Re: Settle this argument: trailer roof seal
Posted by: deckeda
Date: August 06, 2020 07:08PM
We have a thing of the self-leveling Dicor coming along with a new vent/fan. Now to see about a solar panel so that it can be run without killing the truck battery.
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