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Lew Hodgett Lew Hodgett is offline
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First recorded activity by BoatBanter: Jul 2006
Posts: 348
Default the raging debate of marine plywood / fiberglassing / etc

kyle wrote:

snip

question1) how do i remove the rotten plywood.. do i take a saw and
just cut the wood out.. or is it screwed in somewhere.. do i need to be
careful *where* i cut? what is underneath the plywood.. more wood
(that is probably rotten as well)??


Remove the plywood in as large a piece(s) as possible, then later use
them as a pattern for replacement.

question2) i've read that if you fiberglass over plywood, sometimes the
fiberglass cracks and lets water seep into the plywood and rots all
over again.. ?? myth or truth?


It depends.

Epoxy provides a water tight bond to wood, polyester resin does not.

Use epoxy for repair work.

question3) so.. what i really want to do is have plywood and then a
paint with sand in it to give a grip to the feet when walking.. and be
done with it.. what plywood/paint/anything in between the two should i
use?


You can use any kind of plywood available if you cover it with epoxy
and glass.


If it were me, I'd use a piece of cheap, 1/2", 4 ply, CDX plywood with
a layer of DB170 (17 OZ, double bias, knitted glass) on each side,
then seal the edges with a layer of 4" "boat tape" (about 6 OZ glass).

It will be bullet proof.

Lew