Before shaping the nose. The small hole in the deck allows for a screw-in plug later necessary to vent air from the hollow core after each surf. Air trapped inside the board expands under pressure with heat.  Photo 16 of 26 in Crafting a Hollow Wood Surfboard from Old-Growth Redwood

Crafting a Hollow Wood Surfboard from Old-Growth Redwood

16 of 26

Before shaping the nose. The small hole in the deck allows for a screw-in plug later, necessary to vent air from the hollow core after each surf. Air trapped inside the board expands with heat, creating pressure.