Leak - Fiberglass RV


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Old 01-17-2011, 08:51 AM   #1
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Name: Kip
Trailer: 2003 Casita 17' SD Deluxe, Towed by '09 Honda Ridgeline.
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Leak

A couple of days after getting our 03 Casita 17' SD home it started raining moderately. I was in and out of the trailer and had a cube heater running.

I noticed a drop of water come from the front / curb side edge of the Fantastic fan trim. This is the corner closest to the door.

The trim I'm speaking of is roughly 1.5" wide that goes around the entire fan and pushes against the ceiling.

I put my finger between that trim and the ceiling and several drop of water ran out and dripped onto the floor. I removed all I could with a paper towel and it returned within a couple of hours.

The next day was sunny as was the one after that. No water was present above the trim. On the 2nd day I went to the roof with silicone in hand. Someone before me had obviously experienced the same problem and there was what looked like an entire ( squeeze ) tube of silicone on the front edge of the exterior mounting plate.

There are no rivits exposed and the smoke cover was closed tight and had no cracks as I could see.

Has anyone experienced this problem? Any Ideas?

One thought is that with the earlier rain and me going in and out and the Cube running, there was excess moisture in the trailer and the trim may have been pushing against the ceiling enough to get cold and form condensation. ? ?

Another is that the smoke cover itself may have formed condensation and eventually had water run down it's insides. But I can't see where it would have allowed any water inside, as it doesn't touch the vertical flange it seals against, except where it should!

Has anyone experienced this problem? Any Ideas?

Thanks,
Kip

Thanks,
Kip
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Old 01-17-2011, 09:54 AM   #2
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Uh-oh you used silicone - stand by to be chastised.
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Old 01-17-2011, 11:24 AM   #3
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I think since you were in and out that should eliminate the condensation theory. I had posted this scenario earlier because on my egg the prior owner or installer used silicone on the fantastic install. I asked if I should remove and install properly and the consensus was if it does not leak, wait. In your case it would appear you have a leak. I think that you should remove all the silicone and reinstall the vent properly using the putty sealer. Take plenty of pictures for the rest of us as I'm sure there are others with the same issue.
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Old 01-17-2011, 11:49 AM   #4
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I have had a similar problem with my 17SD fantastic fan leaking around the edges. Like yours the previous owner seemed to think that Quantity of Silicone would make up for Quality of preparation and application.
It took me some time to remove and clean the offending Silicone mess and I finished just in time for it to start raining non-stop for weeks it seemed.
So I covered the egg with a blue tarp and pondered.

I did not have time to remove and replace it as suggested here and sought the advice of a dealer here whose service people I have come to trust.

I got a tube of Dicor Lap Sealant-Self Leveling and waited for 1 dry day.
I was warned that this stuff is so runny at first it would be a little freaky to apply and the warning was exactly as advertised.
This stuff went down fast and I was sort of scared it would start running off the roof of the trailer!
It doesn't though and once in the air it starts to level out and firm up.....some.

I waited till the next day and went topside and I now had a perfect looking gasket completely sealing the edge and screw heads and it looks very impressive.

The important part of course is that I have had no leaks at all since,not a drop!
It also remains flexible and is U.V. stabilized too.
I am told that if problems arise a light re-application will take care of it without the need to undo or overdo anything?

I was of course reluctant to try this and even more reluctant to say here that I had tried this but I could not be happier with the performance of this product so far.
They also make a Non-Leveling version for sidewalls and windows.

Dicor is made as a Roof sealant and seems to do what it claims.
Just my experience.

Ed
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Old 01-17-2011, 12:30 PM   #5
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Quote:
Originally Posted by Ed Harris View Post
I have had a similar problem with my 17SD fantastic fan leaking around the edges. Like yours the previous owner seemed to think that Quantity of Silicone would make up for Quality of preparation and application.
It took me some time to remove and clean the offending Silicone mess and I finished just in time for it to start raining non-stop for weeks it seemed.
So I covered the egg with a blue tarp and pondered.

I did not have time to remove and replace it as suggested here and sought the advice of a dealer here whose service people I have come to trust.

I got a tube of Dicor Lap Sealant-Self Leveling and waited for 1 dry day.
I was warned that this stuff is so runny at first it would be a little freaky to apply and the warning was exactly as advertised.
This stuff went down fast and I was sort of scared it would start running off the roof of the trailer!
It doesn't though and once in the air it starts to level out and firm up.....some.

I waited till the next day and went topside and I now had a perfect looking gasket completely sealing the edge and screw heads and it looks very impressive.

The important part of course is that I have had no leaks at all since,not a drop!
It also remains flexible and is U.V. stabilized too.
I am told that if problems arise a light re-application will take care of it without the need to undo or overdo anything?

I was of course reluctant to try this and even more reluctant to say here that I had tried this but I could not be happier with the performance of this product so far.
They also make a Non-Leveling version for sidewalls and windows.

Dicor is made as a Roof sealant and seems to do what it claims.
Just my experience.

Ed
So, did you lift up and put the stuff underneath the fan or just around the edges and screw holes? Not sure where you exactly installed the Dicor caulk
and do you have any pictures? Thanks
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Old 01-17-2011, 02:37 PM   #6
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Originally Posted by cpaharley2008 View Post
So, did you lift up and put the stuff underneath the fan or just around the edges and screw holes? Not sure where you exactly installed the Dicor caulk
and do you have any pictures? Thanks
No,I didn't have the time to lift it up or I would have just "bedded" it with butyl rubber or putty tape and then sealed around that.

I did spend some time removing the Silicone though which was neither working at all nor easy to remove?
I use a Multi-Master tool with scraper blade and this works faster and better than anything I have ever tried to remove Silicone.
Then I used some kind of Silicone residue cleaning gunk too before letting it dry and then hitting it with the Dicor.

Sorry no pics but it works and that is what matters to me.

Ed
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Old 01-17-2011, 04:24 PM   #7
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Take it out clean everything and start all over.
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Old 01-17-2011, 09:48 PM   #8
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I agree with Greg, remove the entire vent, clean everything off, wipe with acetone reinstall with butyl tape (not putty) cap the edges and any visible screw heads with a none harding sealer. This will take care of your leak.
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Old 01-18-2011, 07:47 AM   #9
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Looked again and 3 sides of the top of the fan installation, that I can see, appear to have been done professionally. Cant tell about the 4th side as there is silicone on it.

The 3 sides have some kind of sealer tape/gasket applied on top. It is perfectly smooth and overlaps onto the top. Appears to be a silicone type material, somewhat transparrent and will dent when a fingernail is pressed into it. Is that "factory"?

Where is Dicor Lap Sealant-Self Leveling purchased? Since it seems to be "runny", could a dam of some kind be built to contain the "run" until it begins to set up?

Where is butyl tape/putty purchased, and where is it used and how is it applied.

Are the 2 above products purchased in a tube, a can, or a calk gun type container?

I have very limited experience with fiberglass, but there seems to be an underlying problem with silicone. What is the problem with it?

Any additional ideas, and/or suggeations are most appreciated.

Thanks,
Kip
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Old 01-18-2011, 08:38 AM   #10
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Quote:
Originally Posted by Kip in Ga. View Post



Where is butyl tape/putty purchased, and where is it used and how is it applied.


Thanks,
Kip
I had a hard time finding Butyl Tape and then one day while walking thru a larger RV Store it was right there on the shelf..... A roll of white 3/4" butyl tape. Use this under whatever you want to seal and re-tighten the screws on that object and then trim with a platic type item to the edge..... this stuff is not meant to be pressed on to the outside of say a Window... It has to go underneath and then tightened evenly til it squishes out. I really like this stuff.
Go to any RV Store that repairs RV's and i am sure they would have it...... they use it when installing windows
Joe
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Old 01-18-2011, 08:58 AM   #11
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There are many ways to do just about anything and they're all temporary. They can be temporary for... 20 years, or temporary for 20 weeks. Sometimes the easiest is the most time consuming in the long run if you have to redo, redo, redo.
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Old 01-18-2011, 09:20 AM   #12
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here is a link for the tape and you can google "Dicor" if this place doesn't have it.
https://www.makariosrv.com/search.ph...+tape&x=25&y=7
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Old 01-18-2011, 09:23 AM   #13
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Quote:
Originally Posted by Kip in Ga. View Post
Looked again and 3 sides of the top of the fan installation, that I can see, appear to have been done professionally. Cant tell about the 4th side as there is silicone on it.

The 3 sides have some kind of sealer tape/gasket applied on top. It is perfectly smooth and overlaps onto the top. Appears to be a silicone type material, somewhat transparrent and will dent when a fingernail is pressed into it. Is that "factory"?

Where is Dicor Lap Sealant-Self Leveling purchased? Since it seems to be "runny", could a dam of some kind be built to contain the "run" until it begins to set up?

Where is butyl tape/putty purchased, and where is it used and how is it applied.

Are the 2 above products purchased in a tube, a can, or a calk gun type container?

I have very limited experience with fiberglass, but there seems to be an underlying problem with silicone. What is the problem with it?

Any additional ideas, and/or suggeations are most appreciated.

Thanks,
Kip
Dicor also comes in a roll that is applied on top of seams, screws, and around vents on box type trailers. Once applied it is permanent and leak proof. That is probably what you have on 3 sides.
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Old 01-18-2011, 09:24 AM   #14
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Roof Leak Repair Products & Sealing Tape | EternaBond

I had a motorhome with more leaks than dry spots. This cured ALL of it and was relatively simple to put on.

Be warned tho, that once its on, it isn't coming off easily.

It has become the standard for RV Manufacturing.

Dicor is also well recommended, as shown above. It is better suited for areas where visuals are concerned. The eternabond looks like a giant band-aid.. suitable for roof applications, but not side seams or penetrations.

The eternabond will last longer than most rigs will. Do it once, and you are done.
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