Again, I reiterate: MARINE GRADE PLYWOOD,,, much more $ than regulare
plywood, but worth the cost. Finding it may be another story. Also paint &
sealer MARINE RATED where it will be in contact with metal or dampness. By
MARINE I mean rated for boat building not US MARINE CORPS. Who wants to
redo a floor 7 years down the road? Wayne recommended an artificial board
product, but I haven't worked with it yet and I have done many products with
the MG PLYWD. The "leave osb and plywood on the lawn" comment was spot on.
Tom Walden
56 safari
58 wanderer
96 bvan
----- Original Message -----
> You are correct on your definition of OSB.
> But MDF and OSB are not the same nor do they perform the same.
> I do believe use of MDF in RV applications is a really BAD idea no matter
> the exposure rating.
> I know this has been a heated discussion in the past here but....Sticking
> my
> neck out....
> Here is a link to which is better, OSB or Plywood.
> As you may notice they don't compare MDF
> And as you may notice they don't blatantly say which is better. But I feel
> after reading it that plywood is better but marginally.
>
> Both Plywood and OSB are offered in Exterior, Exposure 1 and interior
> ratings.
> I personally wouldn't recommend interior rated wood for use in older RVs
> due
> to moisture problems that crop up from time to time.
> - --
> Warren