Mounting things on roof w/o drilling a hole - Page 2 - Fiberglass RV


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Old 10-12-2012, 10:17 AM   #15
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Name: steve
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By sanding..
I mean to "ruff up" the slick finish of the gel coat.

What VHB tape did you use? Whats the best?

I know some one that is going to refinish his MH using that Red Maxx stuf.
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Old 10-12-2012, 10:19 AM   #16
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Originally Posted by stev View Post
Great idea Tom... thanks..
Would you "sand" some of the gel coat before?
Would sanding make for a better bond or not?

Once the VHB tape is stuck down... say in the years to come,
can it ever be removed from my fiberglass roof?
Like with a solvent or anything?
Or using a razor blade to remove?
I'd follow 3M's directions to the letter. My inclination would be to have the surface extremely clean and oil free, but not sanded.

I believe that the tape can be removed with mono filament line, using it to cut the tape. Application of heat would probably help, too.

http://solutions.3mindia.co.in/3MCon...bute=ImageFile
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Old 10-13-2012, 06:12 AM   #17
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have a look at eternabond double sided tape. It's good stuff! I used the single sided eternabond tape to seal holes in the roof of an aluminum roof camper Im restoring and it worked like a charm. It's very strong.
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Old 10-17-2012, 09:01 AM   #18
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Again thanks.

I was in Lowes.
They sell elevator bolts.
But were only in that black steel
I would imagine SS or plated would be better.
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Old 10-17-2012, 01:09 PM   #19
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Update on VHB Tape mounted Solar Panels

I was out looking at the roof and took the following picture to show what more than a year on the roof looks like. The panels have been thru 3-4 sand storms, 2 hail storms, 2 snow falls, Yuma sun, and and a loop of the USA.

They seem well attached to the roof of our Scamp 16, no difference since the first day they were attached.

Also the thru hull boat fitting used for the wires has never leaked.
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Old 10-20-2012, 11:08 AM   #20
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H Norm,
Thats a very nice, low-profile set up you have there! I am going to be mounting my new solar set up exactly as you have - VHB for the panel and just one hole through the roof for the wiring ...

Would you mind posting a link to the thru hull fitting you used and if you would recommend a different one in hindsight or are happy with what you used?
Thanks a bunch!
-Paul C
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Old 10-20-2012, 11:31 AM   #21
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Thru Fitting

Paul, Very happy with the fitting.

I used the RA140 shown on the following link.

Glomex - The best in Marine Antennas - GAMMA PRODOTTI

I drilled a pilot hole followed by a larger drill for the center cable hole.

I filled the RA140 with Lexal to seal it. I then drilled 3 pilot holes for stainless screws, filled the holes with more Lexal and screwed the into a Lexal bath, wiping it clean afterward.

I had 2-40 watt panels. If I were doing it over I would use a single panel. Incased the panel wires in split corrogated cable cover available at Walmarts.
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Glomex RA140.jpg  
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Old 10-20-2012, 11:50 AM   #22
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So where did you buy it at?
I see the link is in Italy.
Is there another brand available more locally?

Also. what is Lexal?
Googled it/ no luck.

What about a "cableclam"? For the wire.
Amazon has for sale.
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Old 10-20-2012, 12:05 PM   #23
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Thank you kindly Norm and for posting that detailed shot. Again a really smooth looking job on your part.

Steve - you can select English language on the Italian link but I also just googled "Glomex RA 140" and got several options here in the states. Buying mine today!

Thanks again for the help
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Old 10-20-2012, 12:52 PM   #24
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Paul... I am still fumbling around trying to find.
Could you please provide with a link on where you are going to buy.
Thanks.
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Old 10-20-2012, 01:07 PM   #25
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The caulking compound is 'Lexel' not Lexal, my mis-spelling. I use it to hold replacement caps on. It will not stick to Silicone and is supposed to be better.

When putting the caps on I had to remove the silicone the previous owner had used and did not work very well.

Sorry for the error. You cam buy it on Amazon, Home Depot and some hardware stores. It comes in white and clear. I use the clear.

My connector was a gift from a boat installer.
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Old 10-20-2012, 01:21 PM   #26
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Steve try here - both options are about the same price:

Glomex Wire Cover Feed-Thru
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Old 10-21-2012, 02:59 PM   #27
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Thanks... I ended up buying one on ebay.
If you want will let you know when I get it.
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