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Old 06-08-2020, 01:46 PM   #1
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rotting subfloor

Hi, I just peeled back the vinyl flooring in my 2016 Grayhawk 31 FS in the kitchen area below the slideout. The plywood is mush.(see picture) I can't believe my eyes given the motorhome is 4 years old.

I crawled under the rig to examine further. Unfortunately there is a storage compartment exactly where the plywood is mush.

I would appreciate any suggestions on how to replace the mushy plywood. I'm hoping I can simply cut out the bad wood inside the rig and replace without having to remove the compartment below the subfloor.

The mush area is about 1 foot in width and about 2 feet in length. It may be more but at this point I don't want to take apart the slide.

Thanks for your help.
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Old 06-08-2020, 02:40 PM   #2
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You have block foam under the plywood between the floor joist. I doubt that it was caused from below. The water probably got under the linoleum.
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Old 06-08-2020, 03:10 PM   #3
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I would spend some time doing some investigating work.

To get an idea how the floor is constructed, locate a hole, for like propane or electrical ground wires.

Contact Jayco with your Vin number and ask for the construction schematics. That will tell you where the framing members are at.

Probably the most important thing, figure out where the water is coming in at! Bad slide seal, road spray, leak from the roof, etc. Spend some time and get that resolved as soon as possible, or as part of your repair plan.
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Old 06-09-2020, 05:10 PM   #4
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Thank you very much!
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Old 09-27-2022, 11:14 AM   #5
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Exclamation Rotted subfloor under slide

Quote:
Originally Posted by Neil&Anna View Post
Hi, I just peeled back the vinyl flooring in my 2016 Grayhawk 31 FS in the kitchen area below the slideout. The plywood is mush.(see picture) I can't believe my eyes given the motorhome is 4 years old.

I crawled under the rig to examine further. Unfortunately there is a storage compartment exactly where the plywood is mush.

I would appreciate any suggestions on how to replace the mushy plywood. I'm hoping I can simply cut out the bad wood inside the rig and replace without having to remove the compartment below the subfloor.

The mush area is about 1 foot in width and about 2 feet in length. It may be more but at this point I don't want to take apart the slide.

Thanks for your help.



Hey, I have a similar problem. The plywood "sandwich" which exists between the aluminum frame joists and the steel mount for the slide has rotted out. I was thinking of loosening a bolt, and hammering some steel pieces underneath it to better support the slide and then place new marine plywood everywhere else. Thoughts?
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