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Old 05-23-2015, 11:31 AM   #11
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I'd use eternabond. EternaBond

Used it on my new 2012 23.5 ht trailer, recommended by some of the members here and haven't regretted it one bit. It's more of a permanent fix than caulking is by far. Cost is more but who cares about that.

It is also what is used on the roof systems of high end motor coach's.
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Old 05-23-2015, 12:52 PM   #12
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I would use some 6" wide Eternabond and overlap 3" on the roof and 3" on the metal. The Eternabond should expand and contract enough to handle the changes between the 2 materials.
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Old 05-23-2015, 04:25 PM   #13
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what about the air gaps that will occur when the Eternabond is laid over screws? Is this a problem? The screw heads are about 1/8" or so above flat portion of roof; they are about every 8" or so all the way around the metal sections.

Also, when using Eternabond on the seams where roof and aluminum siding meet and you overlap on each side (say a 6" tape with 3" overlap on each side), what about the gap all along that seam, as the tape will not lie perfectly flat?
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Old 05-23-2015, 06:12 PM   #14
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I used a small wooden seam roller to push it down and make good contact. Don't worry about the screws all long as it it pushed down on all sides. If you have bid gobs of old caulk, Roy can carefully remove some of the high spots carefully with a plastic putty knife. Then clean it well before applying Eternabond tape. I bought a can of spray cleaner from the same place I got the tape.
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Old 05-23-2015, 09:26 PM   #15
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Those high spots/voids created when Eternabond tape is laid over the screw heads has me concerned
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Old 05-23-2015, 10:39 PM   #16
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Quote:
Originally Posted by SoCalAngler View Post
what about the air gaps that will occur when the Eternabond is laid over screws? Is this a problem? The screw heads are about 1/8" or so above flat portion of roof; they are about every 8" or so all the way around the metal sections.

Also, when using Eternabond on the seams where roof and aluminum siding meet and you overlap on each side (say a 6" tape with 3" overlap on each side), what about the gap all along that seam, as the tape will not lie perfectly flat?
Quote:
Originally Posted by SoCalAngler View Post
Those high spots/voids created when Eternabond tape is laid over the screw heads has me concerned
First let me say that I share your concerns.

Let me add that although Eternabond tape is a great product, just because it has worked for many people that doesn't mean that it is the 100% correct answer for every repair. The previous owner used a rather unique repair solution.

For the same reasons you mention above, I feel that a sealant combined with a mesh re-enforcement may give better results. The sealant with mesh will better conform to both the uneven surface created by the screw fasteners and the (possibly moving) perimeter edge created by the metal.

Can I say 100% that sealant combined with mesh is the correct answer? Can I say that Eternabond tape will not work? The answer is a definite "No" to both questions. I don't believe that anyone has a perfect solution short of a complete roof membrane replacement.

For the situation under discussion.

Personally, if repair is selected vs roof replacement, I would be inclined to use a sealant with mesh rather than Eternabond tape. That doesn't mean that I haven't used and recommend Eternabond tape. I use it and like it.

FWIW. vic
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Old 05-23-2015, 11:24 PM   #17
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Here's the EPDM rubber roof seal....it's about $100 less than the one on the other link.

Liquid EPDM Rubber Roof Coatings for Roof Leaks Repair - EPDMCoatings

Perhaps a coating of this liquid rubber roof and then some Eternabond tape on my sheet metal repairs. That way all areas sealed and the tape will add another layer of protection.

OR

The Eternabond tape first, then the liquid roof coating?
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Old 05-24-2015, 08:28 AM   #18
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...

Perhaps a coating of this liquid rubber roof and then some Eternabond tape on my sheet metal repairs. That way all areas sealed and the tape will add another layer of protection.

OR

The Eternabond tape first, then the liquid roof coating?
We're solidly into a personal opinion/preference area regarding sealing those rather unique metal patches.

If you use the Rubber Roof coating with a mesh re-enforcement around the perimeter of the metal patches and over the fasteners, I see no reason to spend the money and include Eternabond tape. If future regular periodic inspections show a problem with the edges then Eternabond tape can be added as needed.

I personally believe that using a mesh will give the performance you need. The mesh will do 2 things. It will add to the strength and also create a slightly heavier coating in the areas that the mesh is applied.

This is the mesh I use. It is readily available.

Henry Company HE183196 Yellow Glass Reinforcing Fabric-6"X25' YEL GLASS FABRIC
http://www.walmart.com/ip/21093468?w...707271&veh=sem

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Old 05-25-2015, 10:16 AM   #19
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Thanks Vic. Have you used this on your EPDM roof? Is it safe for use on EPDM roofs? I know it's for house roofs, not necessarily for RV roofs.
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Old 05-25-2015, 11:11 AM   #20
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Thanks Vic. Have you used this on your EPDM roof? Is it safe for use on EPDM roofs? I know it's for house roofs, not necessarily for RV roofs.
I have used the Henry fabric with Dicor self leveling sealant for my 2001 EPDM roof repairs. I've used the fabric to add strength with polyurethane caulk, Life Caulk, roof tar, etc. to add strength for other trailer, boat, vehicle, and home repairs. I've also used the Henry fabric with JB Weld, other epoxy, and glues when bridging or strength is needed.

I have not personally used the Rubber Roof product. The site specs list that it is made for EPDM roof membranes. Based upon the site and Spoon059's endorsement I would use it on my 2001 EPDM roof if major repairs were needed.

I haven't actually seen your roof and patches. Pictures aren't always enough. If your roof looks good then there may not be any reason to spend the long dollar for more patching material than is needed to just seal the fasteners and the metal patch edges.

If the rest of the roof is good then Dicor self leveling sealant or other good quality EPDM repair product used with the Henry fabric may save some money over coating the entire roof. It goes without saying, that decision is totally yours.

vic
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