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Old 09-06-2015, 05:19 PM   #1
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Big Gap In Front Cap And Roof Seal

I own a 2011 Redwood 36 RE.

I just discovered a significant gap where the roof is sealed to the front cap. I've used this forum to learn about roof sealants, but I'm posting because I feel my situation may be somewhat unique due to the size of the gap.

The cap-to-roof seal separation is 2-3 feet long; and as much as 1 inch high. Please refer to the picture.

When I use both hands to push down on the cap so it will come in contact with the roof; it simply pops back up exposing the gap. I can't determine if the roof has lowered in this area or whether the fiberglass cap is warped.

This leads me to believe my only option is to caulk the heck out of that opening. Would I still use Alpha Sytems or Dicor products? Self-leveling or not self-leveling? Do I remove the existing caulking before applying the new caulking. How do I clean the area prior to applying the caulking?

I'm open for any and all comments on how to remedy this problem.

Thanks, Don in Maine
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Old 09-06-2015, 05:37 PM   #2
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That's a super bummer! I don't know if it's just the picture, but it appears that the cap is misshapen... Can't tell for sure. I have no idea how to address that, but I bet someone here will!

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Old 09-06-2015, 06:33 PM   #3
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I had a small slit on my rear cap but it was only a few inches long. I too pushed it down and it popped back. I have thought about using eternabond tape and run it across the whole seam and then apply caulk. You would think the cap would be screwed into the deck. I eagerly want to hear ideas others have on this.
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Old 09-06-2015, 07:24 PM   #4
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Water is getting in under the top cap molding and rusting the screw threads. Clean off all the old sealant you can and remove a screw. You may not find any threads on it. Pre drill cap molding (larger than #8 screw) and add new screws next to old ones. You can pre drill for the new screws if you want to. Clean off old sealant with an old dull putty knife and seal with alpha sealant. I found it on line last year as I have a 2013 34SK and had to spot seal roof.
Dick and Donna
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Old 09-06-2015, 08:54 PM   #5
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I had a 2012 36RE and the same thing happened. The screws that go thru the molding and the alpha roofing into a cross member broke. The screw broke from? excessive flexing was the best guess.

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Old 09-06-2015, 09:53 PM   #6
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Cap Seal

One thing you can do is cut the seal where it is coming up to relieve the pressure. Then push the seal back down and take a piece of eternabond tape and place over the seal where you cut it. Then take Dicor Self-leveling sealant and reseal the whole cap seal leaving the old sealant in place. When I did mine I used 8 tubes on self leveling sealant.
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Old 09-07-2015, 01:28 AM   #7
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There should be a metal strip joining the cap & roof & as stated previously the screws rusted off or are broke, I'd clean old caulk off as best I could to remove old screws if possible & replace with larger screws, preferably stainless steel, & recaulk the crap out of it. That's what I'd do! Right or wrong??
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Old 09-07-2015, 01:33 AM   #8
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You hit the nail on the head
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Old 09-07-2015, 01:43 AM   #9
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Cap Seal

Thanks to everyone for the comments and suggestions.

Don in Maine
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Old 09-07-2015, 02:34 AM   #10
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Don, that Eternabond tape is incredible stuff. I got tired of having very small water leaks in my closet area of my prior fifth wheel so I put eternabond completely across the front seam where the cap met the roof and bingo, no more leaks. Just some words of caution though, be sure you place the eternabond where you want it because once you put it down you can't re-position it. I would definitely try to put new screws in the trim to keep it down before using eternabond. Eternabond is also what Redwood uses on the slideout roofs.
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