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Old 02-03-2016, 07:32 AM   #15
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Location: northern IL
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We have seen soft floors occur when a unit is parked or stored in an area where the ground has a lot of moisture in it. It gets warm in the morning and the moisture comes out of the ground and right up into the floor of the rv. Eventually it absorbs enough moisture that the floors get soft or even rot. Was very common in dutchman aerolites and a few others

2014 Fleetwood Bounder 35k
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Old 02-04-2016, 05:46 AM   #16
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Years ago I had a class a that had plywood failure [delamination] above the cat converter. I was told it was because of the up and down heat transfer to the floor causing glue failure. I fixed it by injecting foam into the floor and weighting it with blocks of cement to prevent it from heaving up. I drilled 1/8" holes into the effected area 3-6" apart put the nozzle of the foam can into the holes injecting the foam and plugging the holes instantly with wooden plugs that I made and tapped into the filled holes, preventing the foam from coming out. It fixed the problem and I never noticed it again. Just a word of caution, it does have to be weighted or you'll have heaved floor. This was done on carpet not hardwood. You cannot have too much weight. Be careful with the foam it can be a mess. A friend did his soft spot and had a heaved floor.

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FMCA F280542
2004 Bounder 35E
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