Reusing old subfloor after insulating

[mweathers]

Question’s in the title. Pulling up the subfloor of a 2007 Chevy Express and it seems to be in pretty good condition. Looks like pressure treated uncompromised 5/8“ 7 ply plywood sitting on a nice corrugated floor. Is there anything wrong with just throwing it back on after putting a layer of insulation down? Would rather not spend the $$ and time to cut new wood to size. Thanks!

[Danjo]

What kind of flooring are you planning to do?

[mweathers]

For lack of better ideas, I was thinking of grabbing some Lowe’s vinyl smartcore pro flooring (waterproof, great durability. We have some in our basement since it floods a lot). Or use this FREE solid oak flooring that I’d try to varnish as thoroughly as I could... trying to save $$ but also not be stupid! Also flexible and open to suggestions

[Native]

I personally do not see any problem reusing serviceable plywood. Since you did not see any rot or rust (you may have an aluminum floor) which might defrade the subfloor. Note that the plywood is likely not pressure treated. It may be marine or outdoor rated because these types of plywood are made with water-resistant glue and should not delaminate when wet.

[mweathers]

Originally Posted by Native

I personally do not see any problem reusing serviceable plywood. Since you did not see any rot or rust (you may have an aluminum floor) which might defrade the subfloor. Note that the plywood is likely not pressure treated. It may be marine or outdoor rated because these types of plywood are made with water-resistant glue and should not delaminate when wet.

Thanks! Good to know, and makes sense. One less thing to worry about.