I reclaim a lot of timber and sheet stock. After reading a few posts on
hear on how to waterproof interior plywood I became curious as to how
you can tell without sacrificing whether the sheet of ply you've just
saved is interior or marine/external ply.

TR

"TrailRat" wrote in message
oups.com...
I reclaim a lot of timber and sheet stock. After reading a few posts on
hear on how to waterproof interior plywood I became curious as to how
you can tell without sacrificing whether the sheet of ply you've just
saved is interior or marine/external ply.

TR

It should have a stamp indicating its properties. If not, its anybodies
guess.
Dave



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Teamcasa wrote:
"TrailRat" wrote in message
oups.com...
... curious as to how
you can tell without sacrificing whether the sheet of ply you've just
saved is interior or marine/external ply.



It should have a stamp indicating its properties. If not, its anybodies
guess.


I'll also add a comment that marine plywood is (supposed to be)
made to a different standard exterior plywood.

Marine plywood is so much more expensive that home boatbuilders
will often substitute exterior plywood, or even doorskins.

--

FF