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 > Eternabonding the windows.....

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Bert the Welder

Van. Island

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Posted: 10/07/20 07:00pm Link  |  Quote  |  Print  |  Notify Moderator

Now that I got ur attention..... [emoticon]

Was in the shop today and the rubber/synthetic sticky tape they put around house windows these days got me thinking. Why not do that on RV's?
Wrap the window cutout with Eternabond tape, maybe the 2" stuff, inside the cutout frame and out over the outside. Just enough that it doesn't peek out from beneath the window frame. Then butyl on top to bed the window.
Just throwing it out there as a random brain flart. No idea if it's been done before. Just thought it be a good belt and suspenders way to keep water from creeping between the exterior sheathing and the inside of the wall/insulation/frame.

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Roger10378

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Posted: 10/07/20 09:01pm Link  |  Quote  |  Print  |  Notify Moderator

It sounds like it can't hurt anything and might help if you are having water intrusion in that location. When I added an outside vent for the M/W to my trailer I did basically the same thing but used aluminium foil tape instead of Eternabond. If I had thought about the Eternabond I probably would have gone that route.


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JIMNLIN

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Posted: 10/07/20 09:16pm Link  |  Quote  |  Print  |  Notify Moderator

Should look great with all those 2" wide band aid strips all over the trailer [emoticon]. However if resale/looks isn't a issue and the unit will be like a hunters cabin in the woods then looks should be fine.


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rhagfo

Portland, OR

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Posted: 10/07/20 11:16pm Link  |  Quote  |  Print  |  Notify Moderator

JIMNLIN wrote:

Should look great with all those 2" wide band aid strips all over the trailer [emoticon]. However if resale/looks isn't a issue and the unit will be like a hunters cabin in the woods then looks should be fine.


If you read the OP post, the thought was to wrap like the window frame in a new house. about 1/2" on the side of the opening the rest coming and covering the open space/ insulation.


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gbopp

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Posted: 10/08/20 03:56am Link  |  Quote  |  Print  |  Notify Moderator

Would the (minimal) thickness of the Eternabond interfere with the window seating properly on the butyl tape?
I'm thinking it could leave a small gap between the window and the side of the RV.
Maybe it would be better to just use the tape they use on houses?

LarryJM

NoVa

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Posted: 10/08/20 04:46am Link  |  Quote  |  Print  |  Notify Moderator

gbopp wrote:

Would the (minimal) thickness of the Eternabond interfere with the window seating properly on the butyl tape?
I'm thinking it could leave a small gap between the window and the side of the RV.
Maybe it would be better to just use the tape they use on houses?


Instead of Eternabond if I was redoing a window I would wrap the opening like the OP suggested with 2"/3" wide aluminum tape. It's extremely thin and would make the opening basically waterproof. You would just have to be careful installing the window to avoid tearing the tape.

Larry


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RAINKAP INSTALL////ETERNABOND INSTALL


theoldwizard1

SE MI

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Posted: 10/08/20 07:23am Link  |  Quote  |  Print  |  Notify Moderator

Bert the Welder wrote:

Was in the shop today and the rubber/synthetic sticky tape they put around house windows these days got me thinking. Why not do that on RV's?
Wrap the window cutout with Eternabond tape, maybe the 2" stuff, inside the cutout frame and out over the outside. Just enough that it doesn't peek out from beneath the window frame. Then butyl on top to bed the window.

Why bother with the first step. Just butyl tape.

I do NOT believe that ANY caulk/sealant lasts "forever". When you place it between two dissimilar materials and expose it to a "non-sheltered" environment you have two powerful forces acting against it.

All materials heat and shrink with ambient temperature changes. The bigger the change in temperature the more expansion/contraction. This is a very powerful force working AGAINST your caulk/sealant !

Sunlight, especially the Ultraviolet portion of the spectrum, causes material to "breakdown" over time.

IMHO, design seals to accept butyl tape and be easily replaced.

Bert the Welder

Van. Island

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Posted: 10/08/20 09:00am Link  |  Quote  |  Print  |  Notify Moderator

OK... this got misunderstood a bit it seems.....

No Alum. tape was involved.

E-Tape wouldn't stick out past the outside surface of the window frame/trim so not visible, so wouldn't look like a hack job. I used 2" as an example as it's the narrowest I've seen it come in. Not to say it doesn't come narrower, just that's all I've seen. So it your walls are an 1.5" thick, you'd be left with a 1/2" wrapped to the outside wall surface. Not that yours or all walls are that thick, but it's just as an example.....

Bert the Welder

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Posted: 10/08/20 09:01am Link  |  Quote  |  Print  |  Notify Moderator

rhagfo wrote:

JIMNLIN wrote:

Should look great with all those 2" wide band aid strips all over the trailer [emoticon]. However if resale/looks isn't a issue and the unit will be like a hunters cabin in the woods then looks should be fine.


If you read the OP post, the thought was to wrap like the window frame in a new house. about 1/2" on the side of the opening the rest coming and covering the open space/ insulation.


BINGO! [emoticon]

Bert the Welder

Van. Island

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Posted: 10/08/20 09:11am Link  |  Quote  |  Print  |  Notify Moderator

gbopp wrote:

Would the (minimal) thickness of the Eternabond interfere with the window seating properly on the butyl tape?
I'm thinking it could leave a small gap between the window and the side of the RV.
Maybe it would be better to just use the tape they use on houses?


The E-Tape would be pretty flat like the camper sides and the butyl would still act the same as it would squish down just like it does when applied sans E-Tape. Perhaps having the EB be a bit more recessed back from the perimeter of the window trim/frame so the butyl laps over that edge may be a good way. But I don't think it's needed as water isn't going to get under the edge of the EB if properly applied.

I wouldn't be surprised if the tape used on houses isn't just a different form of EB. Though, due to being covered by all the house cladding and trim, it's not exposed to weather and sun. EB is designed to be exposed to all that, so I wouldn't go and use the house stuff on an RV necessarily. It also may not take as much movement as EB does.

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