Plywood for boat building. apa technical sheets. the following are technical data sheets from the american plywood association. plywood grading in the us is not regulated by the federal government, but is a voluntary set of standards administered by apa.. Materials & tools: all the designs call for marine plywood, 1/4" for the hull and 1/2" for the bottom (except 3/8" for 10′ mini).scarfing the plywood will be needed. links and info for scarfing the plywood are included, it is not as difficult as it sounds.. Wooden kit boats,kit boats cut by cnc machine, boat plans for purchase, yacht designs and boat kits for boats built from wood epoxy, plywood,wooden boat kits, dinghies, cruising sailboats and power cruisers, rowing shells, boatbuilding advice, dudley dix design boat kits, lavranos design boat kits, catamaran boat kit, supplers of plywood, bendy plywood, flexible plywood, deluxe light plywood.