Undercoating options (plywood)

[peterlevins]

Time has come to prep the underside. After much research, I was set to use a top quality house paint and primer but the more I think, the more I question myself. So, I’m posting to see what the popular method is.


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[Woodbutcher]

Check out this thread that is running now on the same subject. It says Flour, but he meant floor.

viewtopic.php?f=21&t=72285

[peterlevins]

Check out this thread that is running now on the same subject. It says Flour, but he meant floor.

viewtopic.php?f=21&t=72285

Cool, thanks


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[printer]

I bought a gallon of Tremclad rust paint for the frame, should have just bought a quart. But needing to paint the bottom of the floor I used the rust paint. It is an oil based paint and seems to stick well enough on wood. Many years ago I used some on monitor speakers for a band, it took a beating. I am putting foam underneath the floor and it was more for moisture proofing than anything. If anything I would go for an oil based paint.

[GPW]

Has the Black Nasty stuff fallen out of favor ..??? Roofing cement …

[peterlevins]

Has the Black Nasty stuff fallen out of favor ..??? Roofing cement …

Seems many are still using it but house paint etc are just as popular


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[booyah]

I opted for black beauty fence post paint. Figure if its supposed to protect fence posts in the ground from moisture it will work for the bottom of a camper. Then i added insulation below that. 5 years and thousands of miles this spring and so far so good

[BaldJoey]

I'm almost to ubdercoating. Im thinking about truck bed liner. Any thoughts?

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[peterlevins]

I'm almost to ubdercoating. Im thinking about truck bed liner. Any thoughts?

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I went with an oil based primer and 3 coats of gloss latex
The wood can expand and contract and breathe


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[BaldJoey]

Anything special you did to fasten your footwell?

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[peterlevins]

Anything special you did to fasten your footwell?

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Glued and screwed. Tight fit is key


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[BaldJoey]

3/4" marine grade ply?

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[peterlevins]

3/4" marine grade ply?

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Marine ply is not necessary for builds. Same glues are used. I used 3/4 AC ply. The oil base primer seeps in to the wood


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[BaldJoey]

Cool, Thanks!

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[peterlevins]

Cool, Thanks!

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Some even go bare wood for the bottom. Good prep and paint is all you need.
They all say, it rots from the top down so floor is the least in need of coating


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