In 1926 in Hawaii, Tom Blake decided to dramatically reduce the weight of the surfboard. He achieved this by drilling multiple holes into his redwood board, then covering the entire thing up with a thin layer of wood. Surfboards continued to be made from various wood combinations until the 1940’s.
In 1935, the same Tom Blake added a fixed fin to the back of the surfboard and by some is considered to be the most influential milestone in the history of the surfboard.
This change provided increased stability, the stopping the board from sliding sideways on the wave, and allowing surfers to maneuver the board better.
In the 1940’s fiberglass became more easily available and surfboard designers saw its possibilities.
Fiberglass meant that surfboards could weigh a lot less, and be waterproof. Initial designs involved a core of balsa sealed with a layer of fiberglass.
In the 1950’s, balsa wood cores were replaced with polyurethane foam. This enabled surfboards to float better and allowed surfboards to be manufactured a lot more quickly.
In fact, polyurethane foam was so popular that surfboards are still made with this as the blank to date, even though epoxy foams have been introduced.
In California during the 1950’s, Surfboards were hand carved in local barns. The designers, known as “shapers,” would carve blocks of polyurethane foam into the perfect shape then coat it with fiberglass for strength. Legends like Greg Noll and Rusty Preisendorfer spent their days in these “Surf Barns” or “Shape Shacks” designing the future of the sport of surfing.