To fiberglass or not To fiberglass - Fiberglass RV


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Old 09-18-2007, 05:05 PM   #1
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I am remodeling My 13' scamp and noticed that the floor is rotted under the fridge and at the back under the rear window. I am planning to replace the floor in these spots and I would like to not have to fierglass the underside of the floor. Can I just seal the underside and Glass the top side really good with several layers to make up the strength on the top side?
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Old 09-18-2007, 05:09 PM   #2
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I don,t see why not.If you use a good sealing material and it does not hamper the looks on the out side i would go for it.
I would also let a few other people post with there thoughts before you do any thing.
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Old 09-18-2007, 05:57 PM   #3
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I am remodeling My 13' scamp and noticed that the floor is rotted under the fridge and at the back under the rear window. I am planning to replace the floor in these spots and I would like to not have to fierglass the underside of the floor. Can I just seal the underside and Glass the top side really good with several layers to make up the strength on the top side?
I too had a rotten spot in the floor of our 16' scamp. The suggestions and links to other info on this sight were great. I was off and running and the learning curve with fiberglass can be ummmm ? sticky ? but once you get the hang of it and learn the appropriate amount of hardenter it goes pretty good.

My repair was to cut and clean out the rotten stuff. Fit a new piece of sheeting for the patch, and then flip it over and glass the bottom side before I installed it into the camper. I attached "scab" pieces to the underside of the holes in the floor to provide me with screw in points. Once I had the patch installed I glassed the topside allong with a couple of applications of resing to fill the seams. I then glass matted the patch into the wall, and glass matted the seams as well. Sand smooth after it sets so the new flooring wouldn't have a bump when we're done. In the spot under the fridge no sanding necessary.
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Old 09-18-2007, 09:55 PM   #4
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Thanks for the info but I think I may have explained it wrong. I am wanting to remove the entire rear section and side of the floor and was wondering if only Glassing the top side along the shell wall would be enough or do I have to do the underside as well ??
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Old 09-18-2007, 10:18 PM   #5
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Isaac,
I see no reason why your floor project will not work. 99% of the structural failures to floors in trailers are due to water leaking from above and not from below the floor. In dry climates like the western 2/3 of Texas, where you and I both live, there isn't enough rain or humidity to be a problem. My 34 year old trailer has a plywood floor with nothing underneath but a coat of paint and it's solid as a rock. One of my future projects is to paint the underside with POR 15.

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Old 09-18-2007, 11:10 PM   #6
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I am wanting to remove the entire rear section and side of the floor and was wondering if only Glassing the top side along the shell wall would be enough or do I have to do the underside as well ??
I think glassing in the top side will be adequate. I found an old post: Victor Benz' baggage door mod and floor repair.
i think it could be of some help.
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Old 09-18-2007, 11:24 PM   #7
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I think glassing in the top side will be adequate. I found an old post: Victor Benz' baggage door mod and floor repair.
i think it could be of some help.
Wow!! thanks !!! That really has some good pictures. I thought I had some problems!! That was a pretty major repair. I Probably am not going to glass the whole top as they did but I think I will glass the whole perimiter 3" to 4" along the edge top and bottom before I glass it into the wall on the top side only. I hope it works!
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Old 09-19-2007, 07:35 AM   #8
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The boatbuilder's ideology says that wet wood expands and contracts, and will eventually break the wood/epoxy bond, and so encourage encapsulation, where all faces of the wood are sealed. However, some trailers come from the factory built as you plan to repair, glassing the perimeter only, so this should work just fine. The toughest part of repairs is knowing where to draw the line....
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Old 09-19-2007, 08:59 AM   #9
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The boatbuilder's ideology says that wet wood expands and contracts, and will eventually break the wood/epoxy bond, and so encourage encapsulation, where all faces of the wood are sealed. However, some trailers come from the factory built as you plan to repair, glassing the perimeter only, so this should work just fine. The toughest part of repairs is knowing where to draw the line....

So do you think that only glassing the top side to the shell will be strong enough to hold the weight of it?(multiple layers of course) or should I glass the underside to the shell as well? The thought of fiberglassing overhead from under the trailer just seems like a nightmare!
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Old 09-19-2007, 09:35 AM   #10
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Just a carry-on from Frderick's post. I did fiberglass the entire floor inside. Outside, I sprayed the bottom of the floor at the joints where the floor lay on the frame with a auto undercoating product. I then crawled under there (it was lifted some 6 inches on boards) and hand painted the bottom with a thick body undercoating product. I paid special attention to the wheel wells and just behind the wheel wells where most of my problems were. Took some 6 spray cans and about 3 gallons of undercoat. All phtos are on the website below.

http://good-times.webshots.com/album/551123968ABqdPX

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Old 09-19-2007, 09:50 AM   #11
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So do you think that only glassing the top side to the shell will be strong enough to hold the weight of it?(multiple layers of course) or should I glass the underside to the shell as well? The thought of fiberglassing overhead from under the trailer just seems like a nightmare!
I think you want some mechanical fasteners involved; especially if the patch is in a location which will take significant weight (like walking on it). How about posting some pictures of the area that you are going to patch
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Old 09-19-2007, 03:24 PM   #12
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My 81' Burro floor was glassed top and bottom by the factory and still is solid today.
I would say go ahead and glass the bottom too.
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Old 09-19-2007, 03:36 PM   #13
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My 81' Burro floor was glassed top and bottom by the factory and still is solid today.
I would say go ahead and glass the bottom too.
Pete, Donna Shubel might take issue with that from her Burro experience!

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Old 09-19-2007, 05:27 PM   #14
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Roger,
I must have missed that. I can't find her with search, any details?
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