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Old 12-06-2017, 04:06 PM   #1
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Crack in roof - Take a look?

So I was on the roof of my 2004 Class C, and noticed that there was a crack in the top plastic piece above the roof. It doesn't appear to be the roof, but the plastic piece which may cover the lighting wiring or something else. I filled it with Dicor temporarily before this picture was taken. You'll notice some dicor around the openings which was my doing. I then cleaned it off so I could get a decent picture. It doesn't necessarily look like a crack, but more of a seam that possibly came apart. I filled it again with a thick bead of Dicor to weatherproof after the picture was taken. Any suggestions on what caused this? Any suggestions on how to repair?


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Old 12-06-2017, 06:12 PM   #2
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It does look like a seam, not a break which I'd think would be a bit more jagged. Rather than use Dicor caulk, I'd use Eternabond tape to cover the gap.


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Old 12-06-2017, 06:19 PM   #3
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As impressive as the seam is--the caulking "job" below it is even more impressive--wow!
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Old 12-06-2017, 07:35 PM   #4
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Yeah, I was noticing that too. Looks like it is time to remove some caulk and start over. The rust spot your caulking gun is pointing at may be a fastener that has been getting wet also. Time to break out the heat gun and scrapers.
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Old 12-09-2017, 03:21 PM   #5
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That amber lamp has a cracked lens too. Water gets in there then down into the structure. I second the eternabond tape.
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Old 12-09-2017, 09:24 PM   #6
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If I were you, I would remove as much caulking as I can from the joint. Then I would put eternabond both on the crack as well as the joint.
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Old 12-23-2017, 08:00 PM   #7
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If the roof is fiberglass? Just take the MH to a boat dealer that repairs fiberglass. They can repair it correctly and permanently.
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Old 01-04-2018, 02:24 AM   #8
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Roof Seam

Looks like where the side caps were joined. Not a crack, I agree it would have rough edges. Looks like it is time to take a close look at the entire roof of your coach and use eternal bond on all these seams and overlaps. I did my coach took 4 rolls of 4 inch and one roll of 6 inch, a little pricy, but I do not have to worry about it for the rest of the time I own the coach. That's a good thing!!

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