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Old 09-18-2016, 03:04 PM   #11
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My 2010 213EXP had a soft spot in the floor where there was a seam in the flooring. Of course, this was right at the entrance door to the trailer so it was a very high foot traffic area.

Since my 2010 is now out of warranty, and the soft spot getting worse, I took action.

I bought cut a piece of 5/8" plywood to width (about 21" wide) by a length of 48".

I also bought PL construction adhesive (for a caulking gun) and covered one entire side with this adhesive. I then put the board up in place and held it there with a automotive floor jack.

I then cut 2 pieces of 2x4 lumber 21" long each and covered one side of each with PL construction adhesive. I spaced them 24" apart.

Then I cut some metal angle to support the 2x4s and screwed them in to the cross members.

Once complete I sprayed everything with automotive under coating (in a spray paint can).

I allowed the adhesive to cure 48 hours. The floor is now rock solid. We went camping for 10 days straight about a week after fixing the floor and the floor has remained solid in that high traffic area.

I've attached a picture of what the underside of the trailer looks like now.


2015 Jayco WhiteHawk 28BHKS Summit Edition
2016 Ford F-150, 4x4, 3.5L ECOBOOST, MaxTow, Supercrew, 6.5FT, 3.55 axle
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Old 09-18-2016, 03:18 PM   #12
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^^^ I think that`s the real issue with these floors, the lack of under support and not so much the flooring material itself. Your fix looks like it should do the trick.

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Old 09-18-2016, 04:38 PM   #13
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Any chance your coming west to BC ?

I would like one of those.

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Old 09-18-2016, 04:41 PM   #14
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Originally Posted by Lostone View Post
My guess is it's where the cut out in the foam for the water pipes to run through. The luan over that spot has water damage. I'd bet money on it. There are no seams. The styrofoam is one large front to back panel, with luan over it glued down. When it's right you can't feel any seems.

I've seen this before. Being right in front of the sink is the giveaway.
i did not describe my situation properly, im a stupid frenchman you know lol....no water damage there we can clearly see the junction of two sheet of sandwich floor. and its not in the cupboard under the sink its where you stand in front of the sink...sorry for the confusing btw you can clearly see the seam through the vinyl floring, a nice straight line for the width of the trailer at that location
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Old 09-29-2016, 06:14 PM   #15
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My dealership received the instruction about the proper way to fix that sandwich
its scary the procedure....4 pages, looks like the wont go from under to fix it, they remove the vinyl florring at the spot where the floor is sinking. approximatly 4x4 , they strip the first layer of luan, all the styrofoam, down to the luan at the very bottom, the will get to some crossmember, weld tube for reinforcing and build with plylam on top........heading to a catastrophy iam afraid . the trailer go in tuesday next week.....

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