Surfboard foam blanks are the blocks of foam that form the core of a surfboard. They are typically made of polyurethane (PU) or expanded polystyrene (EPS) foam.
PU foam is denser and stronger than EPS foam and is used in high-performance surfboards that require more rigidity and strength. EPS foam is lighter and more flexible, making it a popular choice for beginners and longboards.
The foam blank is shaped into the desired surfboard shape using various tools, such as planers and rasps, and then covered with fiberglass cloth and resin to create a strong and durable surface. The foam blank provides the buoyancy and floatation necessary for surfing, while the fiberglass and resin add strength and stiffness.
Surfboard foam blanks come in a variety of sizes and shapes, and the type and size of foam blank used can affect the weight, performance, and handling of the finished surfboard. Surfboard shapers take these factors into consideration when selecting a foam blank for their boards.