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Old 01-24-2011, 05:53 PM   #1
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Roof Vent replacement & re-sealing


Will be replacing the existing rear powered roof vent and just re-sealing
the front roof vent , in readiness to fit both vents with MaxxAir 2 covers.

Question is , whats the best way to seal the vents ?
Have picked up the eternabond universal roof vent fitting/sealing kit, was just wondering is this the best way to seal vents? Or is there other ways/items used to seal the vents that people have used?

Plus with other roof fittings ie tv antennas and holding tank vents , is it best to use eternabond tape only? Or a combination of say putty tape or lap sealant with the tape?

Thanks in advance for any info.

Will put up picks of the before during & after process! Picked up one of the new king control Jack *complete* always up TV antennas , so this is going up on the roof along with the 2 maxxair covers

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Old 01-24-2011, 11:28 PM   #2
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Personally I would use Dicor self-leveling sealant. It is cheaper and seals just as well-if you thoroughly clean the surfaces first(which applies to both). While you are installing new vent fans, consider the new high air flow fan replacement from RVupgrades.com You may view it in the Vendors forum.

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Old 01-25-2011, 01:39 PM   #3
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Thankyou for the advice & mentioning that high air flow fan replacement! We had decided to do just that, will be replacing the 12v original vent in the rear with a standard non-powered one (cheaper) and get 1x of those fan upgrades.

The hinge hangers had been ripped off the rear one due to high winds, we thought we could get away with a lid replacement but climbing the roof with a new lid there were no hinges to attach it to! So the rear is getting a new standard vent and that bolt on fan.

Will look into that Dicor stuff too.
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Old 01-25-2011, 03:21 PM   #4
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Rather than thinking what is best, consider creating several barriers that water must go thru before getting inside. When the first fails several barriers still exist. To that end I've used 2-3. On roof vents I have used the putty tape, then lap sealant, then Eternabond. For things like Refrig vent & plumbing vents I do not use the Eternabond. Look thru my reroof pictures link below to see the pictures of reinstalled vents & things.
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Old 01-25-2011, 04:51 PM   #5
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I like to bed the vent flange with the Butyl tape. Then cover the whole thing with 4" wide Eternabond tape. It will never leak. The Etrenabond kit is a bit shy on the proper amount of tape to do either job properly.

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