DryPly?

[KrisE MN]

called home depot for marine grade ply. dryply which is used as sub floor in new construction can be submersed for 90 days without swell. 3/4" 30 a sheet and he says as strong as marine grade at 80. Any discussion on this before?

[AWCHIEF]

Sounds like good product. I would still paint and seal it throughly both sides and all edges. Better yet if I was rebuilding I would use an engineered product. Extra cost would be insignificant to the total cost and longevity.

[robert claus]

If you don't find a leak for a couple of years, will you be any better off? Of course, anything is better than the exterior grade stuff that Airstream uses.

[KrisE MN]

doing more research I think marine is best. I found out its a wax coating to keep lumber piled up from warping. All this work to take a risk isn't worth it

[cwf]

if you can get the 'dry' stuff for real cheap, then, strength should be similar... then you can 'apply' your best waterproofing solutions...

[Stefrobrts]

I doubt they had anything half that good when they built our trailer, and it lasted 35 years. I went with Marine plywood and didn't seal anything. If I get another 35 years out of it, I'll be happy. That DryPly sounds pretty good, and a LOT cheaper!