I'm making a 6'1" surfboard. How much fiberglass do I need?
The standard glassing schedule for a shortboard is one layer 4 oz E glass on the bottom with one later 4 oz + one layer 6 oz E glass on the deck to reduce pressure dents and dings from your heels and knees while popping up.
The 6 oz will be 1" short but that's OK, you put that on the deck first and cover with the layer of 4 oz. that wraps around the rails.