Waterproofing the 1/8" thick exposed plywood
On the inside wall area of the outside kitchen, pass though storage compartment and propane tank areas of my 5th Wheel, there is exposed plywood or paneling type material. The most concerning would be...
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I had to remove my propane tank on my 2006 5th Wheel yesterday. Same idea, open to the outside air underneath. I see the exact same setup that you have in your picture. However, after 14 years, it looks exactly the same, no rot, no degradation to the material. Not sure, but it sounds like you are fixing a problem that doesn't exist.
