On Tue, 27 May 2008 00:24:00 +0200, Heikki wrote:

Pete C wrote:

When building with non-marine ply, try boiling an offcut to test for
delamination.

I have seen this advice a few places, and I know that to qualify for marine
grade, plywood has to survive some heavy boiling tests. But I don't
understand what boiling has to do with endurance in marine environment.
Most of us don't sail in waters anywhere near boiling temperature.

-H

Boiling speeds up the breakdown process so you can find out quickly if
the ply is any good. A better test would be to make up samples and
leave them in the expected enviroment for a few years to see if it
will stand up but nobody wants to wait that long.