Foam filling is one of those two edged swords. You could or probably should
make some little holes where water might puddle up, like where a stringer
meets a bulk head.THese may be needed in some bulkheads as well. You could
make these about an 1/2 inch to 1 inch in dia. or the equivalent. Be sure
these are sealed so the wood or foam inside the stringers or bulkheads
doesn't get wet.Sometimes short pieces of pvc pipe are used for these drain
holes. The idea would be to put them in the right places so that water will
drain to the center of the blulge atthe rear of the boat. There it can be
drained thu the transom plug or pumped out.Also they should'nt be so small
that they will easily clog with debris.

--
Ron White
Boat building web address is
www.concentric.net/~knotreel