I am finishing a remodel and the deck has sat unfinsihed for 1 year +. It
is 3/4" plywood CDX covered with a rubber coating and aggragate. I am going
to put a urethane finish on it but notice that the underside of the deck
must have seen some moisture as there are some water marks. Is this a
serious problem or once it is sealed is there something I can do to stop any
Sorry if I seem like I'm being disagreeable, but who builds a deck out
of sheet plywood? I would image that if it was a good idea (especially
using CDX, which I seem to recall is secret industry code for "Cheapeast
Available"), everyone would be doing it. But that's just me.
Water marks and stuff like mold underneath the deck is not good; but
methink it might just be nature's way of quietly nagging you that you
need to not wait more than a year to actually finish a project you've
To stop further deterioration, I would imagine you ought to just get
around to finishing building the thing. And I'm sorta mystified over why
you're going to urethane over rubber coating and aggregate. But like I
said, that's just me.
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