What material is commonly used for boat hulls to ensure buoyancy?

Fiberglass is commonly used for boat hulls because it is lightweight, strong, and resistant to corrosion, which contributes to the overall buoyancy and performance of the boat. The composition of fiberglass, which consists of woven strands of glass fibers embedded in a resin, allows for the creation of a hull that is not only durable but also maintains its shape over time. This material can be molded into various designs and offers flexibility in weight, enabling boats to float efficiently.

While wood is also historically used for boat building, it might not always provide the same level of durability and maintenance ease as fiberglass, especially in varying environmental conditions. Steel, though robust, is heavy and can lead to sinking if not managed properly, while concrete is not suitable for traditional boat hulls due to its weight and lack of buoyancy. Thus, fiberglass stands out as the preferred choice in modern boat design for ensuring buoyancy and overall performance on the water.