Abstract: A method for manufacturing a floating foundation for a wind turbine, wherein the floating foundation comprises load carrying structures and a plurality of air pontoons attached to the load carrying structures, is disclosed. The method includes cutting one or more fiber-reinforced composite structures, such as wind turbine blades, into a plurality of smaller pieces comprising fiber-reinforced composite, molding the air pontoons from the smaller pieces, and attaching the air pontoons to the load carrying structures.

Abstract: A jacket type wind turbine foundation (jacket) for supporting a wind turbine tower comprises a jacket support structure configured to transfer loads from the tower to the seabed. A transition piece constituting the top part of the jacket is configured to transfer the loads and weight of the tower to a jacket support structure, having legs supported by a bracing system of cross members. Each leg is bolted to the transition piece, which comprises one or more cast transition piece segments, a floor, a centrally arranged entrance configured to allow access to the transition piece for staff and/or equipment, and one connection portion for each leg. Each connection portion is attached to a leg at a joint arranged at a level below the level of the floor of the transition piece.