Sit on top surf kayak design

[weissmarine]

I have just popped the hull off the mold. Went 3 layers of glass (cloth, mat, cloth) used poly resin just for economical purposes. Definetely some flexibility issues. Do I need to add more glass for stability? Would epoxy resin add more stiffness? Should I use closed cell or mini cell foam into the hull for added floatation and stability? When adding and glassing the deck will this help with the hull from flexing?

[xsboats]

Addition of foam core and glass tape frames has stiffened lightly laid up whitewater kayaks I have built and should work for you without adding significant weight to your hull. I have also used carbonfiber yarn with a glass tape covering. Seam taping the hull to the deck should add the longitudinal rigidity needed.

[weissmarine]

Cool man, thanks for the reply. Any leads on foam core and carbonfiber yarn purchases? Kind prices.

[xsboats]

ask Mark at Sea Island Boatworks in Mt. Pleasant. He builds some nice cats and is knowledgeable about materials in your area.Scott