Replacing Subfloor

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We replaced a couple of places where the plywood was rotten, but left the rest in place. If it ain't broke...

After patching the rotten spots with fresh plywood, we treated all the parts of the floor that we could reach with penetrating epoxy - epoxy diluted with xylene to make it liquid enough to soak into the floor.

Then we covered the surface with epoxy mixed with a thickener that made it sandable. It takes way more of that powder than you would think. If it's too runny, it doesn't have enough thickener in it and it will be nearly impossible to sand, just like plain epoxy.

There are some pics on our blog.

[perryg114]

The floors looks almost perfect. I would not replace it but I would patch it. You can cut out small sections and splice in new sections by putting pieces underneath to attach to. I see one section at one of the corners but other than that is looks good.

Perry

[Gene]

The floor looks water stained, but a photo doesn't show everything. If only stained, it just needs sealing. But if it has weak spots or mold or is swelled, it probably should be replaced. Only seeing it in person would tell.

But Bill M. says something important—it is always important to prevent water intrusion before it gets to the floor.

Gene

[Luc]

Hello,
I have a question on the plywood subject. My Airstream has had several leaks over the years.The PO didn' t take care of things. The worst leak came from the refrigerator vents. Most of the floor had to be replaced in front of the entrance. I bought a sheet of 19/31 construction plywood, sealed the underside and installed it. That piece seems "springy". There seem to be more give with this plywood than the remaining original. I will add 5 mill birch plywood as underlayment and some type of vinyl tiles. I am worried there will be too much" movement". Should I be concerned? Should I remove it and look for some Stiffier Plywood? I want to do it right. Thanks for your input.

[Luc]

Sorry about the sideways view...
Forgot to say that all fasteners are tight and it probably would not matter if I was installing carpet again. Thanks. Luc