Replace deck

[Monkey Butler]

I did the floor in a friends 18' Lason bowrider several years back. I used 3/4" plywood underlayment and epoxy. Three coats of epoxy on the wood, hit the edges when doing each side so they get sealed six times. Plywood tabbed to sides with 6" tape and epoxy thickned with fumed silica. Joints filled with thickend epoxy and taped. Got everything except the plywood from Raka epoxy. 2 to 1 ratio and the 1-1/2 gallon kit did everything < $100. Call Raka and tell him what you are doing he will tell you exactly what you need.

You could go with fancier materials but keep the the cost of materials / boat value in mind. The original floor lasted this long. If you seal everything carefully your new floor should last longer, probably longer than the boat and you won't lose money if you decide to sell.