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Old 06-01-2015, 12:12 PM   #1
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roof leaking near front cap attachment on right

My roof has been leaking on the right side front near or at the front cap seam on my 2010 373 Georgetown Motorhome since new. The rain water would pool inside along the bottom of the windshield and has rotted out the front portion of the dash board. I have sealed all the clearance lights and along the top of the cap joint as well along the top rail area and it is still leaking. The front corner of the roof on the right side is also flexing when pushed down near the cap seam. Could the roof be leaking in that area? The water runs down along the metal frame inside between the windshield and the passenger side window until it meets the dash board then soaks the sponge under the dash leather cover and runs down and along the windshield bottom edge. Has anyone else have the same problem and can't identify where the leak is? Please help because it is frustrating. Fraser River won't help and my dealer here in Nova Scotia, Canada Doesn't know what to do about it let alone fix the rotted out dash panel.

Bob
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Old 06-01-2015, 04:43 PM   #2
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It sounds like its been leaking awhile.
Yes it is probably the seam above the driver leaking.
You are suppose to inspect your roof regularly especially where the roof meets the front cap right and left.
Forest River will tell you the same. No you are out of any warranty and now you must check it yourself or your dealer.
This happens to many and inspection and sealing/repairs are needed regularly.


PS The dash is just a piece of plywood covered with the covering and easily is removed by a good RV mechanic.
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Old 06-01-2015, 07:02 PM   #3
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leaking roof

I am the second owner and am aware of checking stuff on a regular basis. I still need to know if anyone has had the same problem and where and what is done to stop the leaking. I have resealed across the seam and leak is still there in the front right corner.
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Old 06-01-2015, 07:28 PM   #4
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When I first got my 378 there was a leak at the right front corner when the water would pool there. I got some black 6 inch wide eternabond tape and installed it in pieces as necessary to the right front roof corner. I went ahead and did the same to the left side just in case. I could not identify the exact reason for the leak but have not had a leak for over 3 years now. Have to look closely to see the tape being it is black to match my MH. Mine would leak onto the headliner where the defrost fans are located and eventually flow out their wiring hole. I did it myself as the dealer is useless for warranty work. I caught it before any water soak damage could occur.
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Old 06-02-2015, 02:48 PM   #5
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I also have a 2010 Georgetown 373, and had a roof leak in the same area. In my case, the water pooled into the vinyl padded area under the front cabinets. It all happened during one very rainy day in Oregon last year while we were out. Upon returning, the vinyl padding was hanging down with a big bulge holding at least a gallon of water. I slit the vinyl to drain it into a bucket, and then removed it completely using a razor knife as it was hopelessly saturated. Despite this, mold still formed on the plywood, and I had to remove and rebuild the front cabinet.

The Dicor on the roof had dried out and cracked, although it was not apparent until I started removing it around the leak area. On the outside, the Dicor looked okay. It was fairly easy to spot the leak location on the roof, as there was a small trail of dirt where the water had flowed.

I removed all the Dicor where the front cap meets the roof and used Eternabond tape, along with some new Dicor at the edges of the tape. I found that the Eternabond adheres well to the smooth fiberglass cap, but not quite as well to the textured fiberglass roof. I used a second length of Eternabond tape across the roof to make the seal double wide for better attachment to the textured roof. Where the Eternabond rolls over the edge, there can be some wrinkles. Because of this, I applied Dicor along the edges of the Eternabond as an added measure.

It's not pretty, but we just has 20 inches of rain here at the Arkansas - Oklahoma border area this past week, and I had no leaks. Be sure to scrub the area thoroughly using acetone before applying the Eternabond and Dicor. Use a small roller to press the Eternabond tape to the roof so you get good adhesion. I also did the same across the rear cap to prevent leaks there.
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Old 06-06-2015, 04:15 PM   #6
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roof leak

Hey thanks for the info on the leak. Had much of the same problem but it little worse. The dash board cover was coming up while driving. When I checked the board on under the cover was water logged and was becoming dry rotted. Based on what was said and done to others it helped me get the leaked located and fixed with the tape. At first I was told the roof looked in very good shape but I got the tech to up on the roof and clean it good. That's when he found the area that was leaking near the right front corner. The tech then put tape and sealer all along the front cap. The MH is at the upholstery shop for the dash board.

Thanks for all the info and the pictures it helped convince the dealer to do what I wanted.
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Old 06-06-2015, 05:28 PM   #7
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I'm glad that the photos were able to help. I was hesitant to post the photos because it was my first attempt using Eternabond tape, and I didn't think it looked very good. The stuff is a bit tricky to use and has a learning curve. When I next applied Eternabond across the rear cap seam to avoid future leaks, it came out much better looking than the front.

If I was doing it again, I would use the wider 6" Eternabond tape instead of two parallel overlapping widths of 4" tape. I would also be more careful where it curves over the edge of the roof to avoid the wrinkles so I would not need to use Dicor on the edges, although I would still use Dicor along the edge where the Eternabond meets the textured roof material.

I suppose the appearance is not a big deal, although I still wish it looked better. The important thing is that the leak is fixed.
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Old 06-06-2015, 07:16 PM   #8
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Leaking roof at right front corner

Bubbles. How much of the corners did you cover with the eternabond tape. I covered about an 8 inch square in the right corner and the leak is still there. Should I have covered more of the area?

I don't see anywhere along the cap seam where it could be leaking in. I have been playing with this leak for a long time and am getting fed up with it. I asked my dealer if they have ever pressurized the inside and used detergent soap and water on the outside of the rig to find bubbles and they tell me that they have never done that. They won't even consider fixing my rotted dash.
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Old 06-06-2015, 09:55 PM   #9
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Quote:
Originally Posted by pr_dog View Post
Bubbles. How much of the corners did you cover with the eternabond tape. I covered about an 8 inch square in the right corner and the leak is still there. Should I have covered more of the area?

I don't see anywhere along the cap seam where it could be leaking in. I have been playing with this leak for a long time and am getting fed up with it. I asked my dealer if they have ever pressurized the inside and used detergent soap and water on the outside of the rig to find bubbles and they tell me that they have never done that. They won't even consider fixing my rotted dash.
I used 6" black tape and the area covered would be about a 10" square. Because I used black I was able to apply the tape rolling over the side edge about 2 inches and it is hard to see it. I suspected a crack in the fiberglass roof but could not verify that so I applied enough tape to cover the corner area completely. I've had no leak issues for 3 years now and I've been in some very hard rains and still pooling in that area. Maybe I just got lucky.
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Old 06-09-2015, 02:34 PM   #10
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Also be sure it is not coming in around the windshield. I had a small pesky leak and tried sealing with silicone to no avail. Then I found out about a "liquid" silicon sealant that goes on very thin then hardens. It drips into very small cracks and leaks better than other sealants. I Got it an Advance Auto. Also, follow the advice of the pros, and if you are pretty sure your leak is at the cap, remove all of the old sealant, clean it up real good, and reseal with professional lap sealant.
It is a lot more trouble than patching, but much more reliable
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