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Old 10-20-2007, 05:06 PM   #1
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Where the fiberglass roof attaches to the sidewalls above the rain gutter, does the caulking actually prevent any water leaks or is it just to hold the roofing on?? I'm having to dig out the old caulking on the front 6-7 feet along the drivers side (what a chore) but the passengers side just has hair line cracks back to about the awning bracket which can probably be filled without too much hassle. If it very unlikely to leak any place along this roof line maybe I'm over doing the caulking preparation. I've taken the Winnebago factory tour before but never got to see the wall and roof attachments so don't know how all this attaches together.
Thanks for any help.
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Old 10-20-2007, 05:06 PM   #2
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Where the fiberglass roof attaches to the sidewalls above the rain gutter, does the caulking actually prevent any water leaks or is it just to hold the roofing on?? I'm having to dig out the old caulking on the front 6-7 feet along the drivers side (what a chore) but the passengers side just has hair line cracks back to about the awning bracket which can probably be filled without too much hassle. If it very unlikely to leak any place along this roof line maybe I'm over doing the caulking preparation. I've taken the Winnebago factory tour before but never got to see the wall and roof attachments so don't know how all this attaches together.
Thanks for any help.
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Old 10-21-2007, 02:48 AM   #3
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That caulking area is supposed to be checked every 6 months per Winnie.

There have been many discussions about caulking those seams and the use of Eternabond to eliminate the caulking. May I suggest you look for Either Eternabond or caulking on this site.
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Old 10-21-2007, 03:03 AM   #4
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The cutaway of the roof/sidewall construction I have seen at the dealers, indicates the roof overlaps the sidewall by about a half inch. That would indicate no leaks if the sealing had minor flaws, however there have been reports of the roof pulling off while driving due to major roof to sidewall sealing failures.
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Old 10-21-2007, 05:45 AM   #5
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Here's a quote from the "Super Structure" section of the Winnebago website.

Our Thermo-Panel sidewall and roof design pressure bonds the exterior skin, lauan backing and EPS block foam to the walls' aluminum framework, while our unique interlocking sidewall and roof joint design ensures that the weight is carried by the metal substructure, not by a few attaching screws (like some competitors' models). The overall result is a stronger, more durable motor home.

The answer to your question would be tthat the caulking only seals out the water the side walls are joined to the roof by an interlocking joint.

As for reports of the roof blowing off, the only report I'm aware of on this forum was by the owner of a 13 year old coach. In that case they were the second owners and had no knowledge of what it may have gone through during the time the first owner had it. In any case it's not likely the lack of caulking caused the problem.
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Old 10-21-2007, 05:48 AM   #6
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The failure on our roof was because the overlap was only 3/16" so as the roof flexed in the wind, the roof let go. They replace the side rails, and it let go about 2 years later, and would not fix it. The insurance paid for it this time.

Now the roof is literally taped on with double stick 24" wide 3m tape. Haven't had any problem in the last 4 years now.

This was on a 99 diesel Suncruiser.
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Old 10-21-2007, 11:23 AM   #7
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Thanks for all the replys. I've about finished with re-caulking any places with cracks in them. I've read several posts on the various forums about Eternabond and some seem to think even though it does a terrific job it also doesn't look as neat as caulking ( as if I could possibly do any kind of neat caulking). Thanks again.
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Old 10-25-2007, 06:17 AM   #8
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We have a 2005 39' Meridian. Just returned from Forest City and paid $3,000.00 to repair ceiling inside from leaks. Of course, they said this was due to lack of maintenance on our part because we are supposed to caulk around the roof line. Also, they caulked the screws that hold our patio awning on to the side at the roof line. We were able to recover $2500.00 through our insurance for water damage. BE SURE TO CAULK!
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Old 10-25-2007, 03:18 PM   #9
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Issues like that really concern me regarding the 10 year roof warranty.. If you calk it yourself how can you prove it?
How can you prove that every 6 months you climbed up on the roof and inspected it? What if you used the Caulk someone at winnie told you to use but in the end it was the wrong one?

What I'm saying is Winnebago has a built in get out of jail card and can essentially deny the claim no matter what...It's one of those built in failures..
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Old 10-25-2007, 04:38 PM   #10
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I just downloaded Winne's sealant callouts for my 2004 Journey. I have ordered from Lichtsinn the sealants prescribed by Winne for the locations I'm interested in, specifically, the overlap between the front top cap and the side Luan above the driver's side window.

I'm hoping that by using the factory designated sealants and carefully applying them, I will not have an issue with Winnebago because nothing bad will happen.

Somehow, I have the confidence that I can do as good a job inspecting and recaulking using proper materials and procedures as any RV Service establishment, and a whole lot cheaper.
By making log entries in my MoHo records, I think an argument can be made that proper inspections were made at proper intervals.

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Old 10-25-2007, 04:52 PM   #11
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I like my Winnebago...it has a lot of features for the money. I also have been impressed with their customer support...I've certainly been the beneficiary of some fine assistance from Winnebago folks.

That said, I think their roof-sidewall configuration is a definite weakness. The expectation for a 6 month inspection of this area is, to me, recognition that this is a weak area. It would seem that it would be fairly easy to modify their build process to have the roof material overlap the sidewall 3 - 4", seal it, screw it down, and put some trim there.

I guess every brand has a weakness somewhere...a place where the engineers seem to have lost their minds. Eternabond is a sure fix for this, but it is not particularly pretty and certainly doesn't work for a coach with body paint.
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Old 10-25-2007, 06:52 PM   #12
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Have a 2001 Brave. Last spring I had to re-caulk both sides of the seam that connected just above the gutter, all 60ft. of it. There was a crack showing of about 1/8+" from the sidewall when you pressed on the roof seam. Needless to say, water had leaked on to the ceiling along both sides for about 15ft. After drying for a couple of weeks I made a mixture of Oxy-Clean and water, sprayed it on, let it dry, brushed it off with a soft brush. Done that a couple of times and water stain all gone. Hope this helps.

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Old 10-25-2007, 11:55 PM   #13
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I have a stain on my roof from when the factory put a new one on, a few months later I had a stain at the roof air conditioners. They had not tightened the 4 screws down that seal the foam by pulling the unit down. They must have gone on break or quit for the day, because I have checked in numerous times. They have never come loose again.

I had planned on trying oxy-clean, ss Rocket Man had mentioned now I know it will work.
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Old 10-26-2007, 12:46 AM   #14
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by smlranger:
I like my Winnebago...it has a lot of features for the money. I also have been impressed with their customer support...I've certainly been the beneficiary of some fine assistance from Winnebago folks.

That said, I think their roof-sidewall configuration is a definite weakness. The expectation for a 6 month inspection of this area is, to me, recognition that this is a weak area. It would seem that it would be fairly easy to modify their build process to have the roof material overlap the sidewall 3 - 4", seal it, screw it down, and put some trim there.

I guess every brand has a weakness somewhere...a place where the engineers seem to have lost their minds. Eternabond is a sure fix for this, but it is not particularly pretty and certainly doesn't work for a coach with body paint. </div></BLOCKQUOTE>

I was just reading one of the RV journals, Family Motorcoach or Destinations one of the two, and it brought out that a 6 month roof seam inspection is really required on all motorhomes regardles of the brand or type of roof. Maybe Winnebago is just more up front about this but it seems to be SOP for all manufacturers.
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