Perrysburg Dodgeboy
Perrysburg, Ohio USA
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Joined: 12/06/2003
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I picked up a Fantastic Fan last winter from a RV shop going out of business at a bargain price. My problem is my TT has a rubber roof and the vent I want to remove has the rubber sealer poured all the way around it covering the bolt and the edge of the vent. How do I remove the old vent without damaging the rubber roof of the TT? Then what product do I use to seal the new vent?
Dealer wants $150 to do the install but I really don’t have the extra cash right new, any help and ideas will be appreciated.
Don
* This post was
edited 07/22/08 11:43am by Perrysburg Dodgeboy *
Perrysburg Dodgeboy
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Yardvarkers
NC
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http://www.diynetwork.com/diy/ab_exterior/article/0,,diy_13687_3133447,00.html
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Retired Phone Man
Covington, Louisiana
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I did mine last year and the hardest part was getting the sealer to let go when removing the old vent. I carefully removed as much as I could but when lifting the vent it still wants to stick to the roof, so slowly cut it loose as you lift the vent. Just cut the sealer and lift slowly. The instructions said to use Dicor but not the self leveling type. Just take your time and it will be fine.
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othertonka
Stockton, CA
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I would suggest using a hand held hair dryer to carefully heat the excess caulking and then use a plastic putty knife to remove enough to expose the screws. Remove the screws and then carfully lift the old vent while making shur you do not "Lift" the rubber roof. The rubber roof will extend completly under the flange of the old vent and usually be folded down into the vent opening. The heating by the hair dryer will usually soften the old caulking enough that it will easily "part" itself from the rubber roof as you lift the old vent off.
I would also recommend that when installing the new vent that you use "Butyl tape" under the flange and new screws and then tighten all screws a little at a time in a "cross" pattern and slowly tighten until you squeeze some of the "Butyl" out equally all around the new vent flange. Clean off the excess "tape" before sealing the edge. Then I would use self leveling Dicor Lap sealant caulking to seal all the screw heads and the gap where the flange meets the rubber roof.
Butyl Tape
Dicor
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Perrysburg Dodgeboy
Perrysburg, Ohio USA
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Thanks guys for the good info and thanks for the link. The temp here is 94* and the lap sealant is very pliable so I think I can get by without the dryer. I just hate messing with the roof! 
Don
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mecreature
Indianapolis, IN
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Joined: 09/27/2004
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Let us know how it goes.. I was thinking of putting one of these in before a trip in August.
It has been hot 92 here in indy
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Perrysburg Dodgeboy
Perrysburg, Ohio USA
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Well the install was easy enough used a putty knife to remove as much of the old lap sealer as I could. Removed all the screws the inside trim and unwired the old fan. Went back up on the ladder and carefully removed the vent, no problems. Added the butyl tape to the Fantastic Vent, then dropped it in the hole and centered it up from the inside then went back up and screwed it down. Added the lap sealant wired it up and she runs like a champ.
Now for the bad part, seems the trim ring they supply is to short for my application as the vent is near the edge of the TT and on a sight angle. So I have an e-mail into Fantastic Fan to see if they have a deeper trim ring, if not I’m going to have to fab something up. It’s always something now isn’t it! 
Upside is, it moves alot of air! 
Don
* This post was
edited 07/18/08 05:28pm by Perrysburg Dodgeboy *
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othertonka
Stockton, CA
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Nice job and thanks for the report on the final job. The anticapation of doing these jobs is sometimes worse than the job itself, but it always pays to "ask" and do research before tackling the job. Is there any part of the old trim ring you can use to fab something?
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Perrysburg Dodgeboy
Perrysburg, Ohio USA
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No the old trim ring has about 1”radiuses in the corners and the new one has sharp 90* corners. If they do not have a deeper trim ring I’ll use some white softie (SP?) trim to dress it out. Should hear from Fantastic Fan Monday and well go from there.
Don
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Retired Phone Man
Covington, Louisiana
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When I got my fan the trim was about 3" high and it had instructions on how to cut it to fit my 1-1/2" area. I'm sure Fan-Tastic has what you need.
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