A member comprising a complex profile made of a composite comprising a polypropylene polymer, and a wood fiber. The composite is useful in construction applications. The profile can be used in residential and commercial structures. The member is used in fenestration components such as windows and doors. The members possess strength, thermal stability and weatherability. The member comprises a complex cross-section with at least one structural web or one fastener web. The exterior can contain a cap-stock and is shaped for use in a fenestration unit such as a window, sash or movable door unit. The members can be assembled in thermal welding processes.