What is the decompression screw?
The decompression screw is usually located at the foot of the mast on windsurf or windfoil boards, and at the front on stand up paddle or surf boards. It may be in the back for some brands.
Why unscrew the decompression screw?
This screw is very important because the board is built around a polystyrene block. This polystyrene contains air which, depending on the temperature or the altitude, will rise in pressure.
When the screw is closed, the pressure rises, the air expands and pushes on the stratum of the board which can end up exploding and tearing the bread.
That’s why when you store your float in your car in direct sunlight or when you fly, it’s very important to open this screw.
How to screw and unscrew the decompression screw?
The easiest way to do this is to open the decompression screw after the session and close it again before going into the water (to avoid it taking on water)!