Abstract: A building panel (10) including a core body (11) containing a compressible solid, and cladding layer (12), on at least one outer surface of the core body, and wherein the building panel is foldable. Preferably, the core is a polymer foam, and the cladding layer is substantially more rigid than the core body for imparting strength thereto. The fold (26) may be provided by cutting the cladding layer from what will become the inside surface of a fold, and removing sufficient material from the core body to permit the panel to be folded. The cladding layer preferably includes a textile of a flexible fiberglass, nylon or polyester in the form of a woven or non-woven mesh (16) with a resin component (17) in the form of a settable liquid applied to, and set into the interstices of the textile with the resin component substantially encapsulating the textile component.