I have a 2005 Winnebago Itasca Spirit 26 A. I have been recaulking where required, but water seeps through the caulk along the front of the seem of the horizontal piece along the bottom of the overhang. I have no problem with seepage or a leak any where else. First, where does the water come from and second why does it seep. The caulk is what was recommended.Thanks.

Welcome Aboard!Best thing is to have it pressure tested, or get a furnace blower and make a pressure tester. Then, soapy solution sprayed from and old 409 bottle will reveal the source. From the inside, you see where the water WENT and what you need is where it entered.Do you have a Front Window? If so, Suspect Number One.Suspect Number Two, Clearance LightsSuspect Number Three, Clogged Track Drain Holes in Cabover Side WindowsFrom there, Suspect Pool (no pun...) is any Seam, any Sealant, any Damage

The leak is on the outside on the underside of the over hang where a metal or acrylic strip goes from one side to the other. There is no leak to the inside of the MH. # 1 and 2 don't apply. #3 Cabover side windows might be it. There are no leaks anywhere else or damage that might be the culprit.Thanks

Not understanding how there is leaking or seeping that doesn't leak to the inside of the motor home. Where is the leak really showing? Are you saying that it leaks in somewhere unknown and leaks back out the seam that goes across the bottom of the cab over?

If it's water coming out from this seam, it's getting in somewhere else and that's just the low point where it collects and finds a way out. I had a similar problem and the cause was the seam between the roof and the cabover front section. The water was running down the inside of the cabover wall and not showing any signs of leakage inside the motorhome, even though a nice puddle had collected and was dripping out the underside seam.If it's water getting into the RV through the seam, I would think that caulking the leading edge carefully with a sealant would be sufficient.I actually left the trailing edge of that seam unsealed on my motorhome intentionally after cleaning up and repairing damage from the leak. I though it better to have a way for moisture to escape if it ever got in again rather than forming a puddle in/around/under the bunk board. There's no practical way I can see for water to be pushed backwards into the seam, either when standing still or driving. I guess speeding in reverse or being ham-fisted with a pressure washer might do it.I would suggest pulling whatever trim you can pull from the inside of the front of the cabover and having a look around there.

Check the front running lights, if you have them. They can be a source of a leak.

Leak in Outside Class C overhang | Good Sam Community

13 Replies

pauldub
Explorer
Jul 26, 2016
Not understanding how there is leaking or seeping that doesn't leak to the inside of the motor home. Where is the leak really showing? Are you saying that it leaks in somewhere unknown and leaks back out the seam that goes across the bottom of the cab over?
slyone50
Explorer
Jul 26, 2016
The leak is on the outside on the underside of the over hang where a metal or acrylic strip goes from one side to the other. There is no leak to the inside of the MH. # 1 and 2 don't apply. #3 Cabover side windows might be it. There are no leaks anywhere else or damage that might be the culprit.

Thanks
j-d
Explorer II
Jul 26, 2016
Welcome Aboard!

Best thing is to have it pressure tested, or get a furnace blower and make a pressure tester. Then, soapy solution sprayed from and old 409 bottle will reveal the source. From the inside, you see where the water WENT and what you need is where it entered.

Do you have a Front Window? If so, Suspect Number One.

Suspect Number Two, Clearance Lights

Suspect Number Three, Clogged Track Drain Holes in Cabover Side Windows

From there, Suspect Pool (no pun...) is any Seam, any Sealant, any Damage

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Leak in Outside Class C overhang

13 Replies

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