We have had quite a few queries about the new
PVC sandwich construction of the new Hull Ocean boards and the new PVC range coming in September
Basically it is a wrap of 3mm high density PVC (Divinycell) around the whole EPS foam core. The Divinycell is also used to strengthen around the fin boxes.
This toughens the board up and improves puncture resistance without adding weight to the board.
The 3mm of high density PVC also helps to stop water getting to the core if you get small cracks or dings in the skin which would normally suck water into the core.
To my knowledge, so far in production SUP's this construction has been limited to moulded boards from brands like Surftech and Boardworks.
The PSH PVC sandwich boards are Vacuum bagged which is a more labour intensive process as no moulds are used. The result is well worth the added durability, with no weight penalty. The 12'6 Hull Ocean paddler weighs 12.3kg bare.
The Vacuum bagging process also allows you to readily improve your board designs as you are not locked into moulds.