There are plenty of ways to seal a deck
, and roofing membranes and mastics that most folks never hear about which form a good watertight seal and stay stuck down. In big enough sheets
so there are no seams to worry about. But you still have things like the mast
and handrails and fixtures--literally everything that is bolted down will have to be reconsidered and probably reattached so it doesn't let more water
into the plywood
. The problem with aluminum
is that you'll have seams to seal, and it may block radio
(cell phones, GPS
, etc.) belowdecks that you might one day want to use.
Check out the local professional roofing supply companies, and price
that up versus conventional fiberglassing. I'd be surprised if aluminum still came out a winner for cost and seamlessness.