Weatherable first surface over a tie layer over a pultruded substrate

A weatherable, capped, pultruded structure comprising, in order from inside to the outside:

• a) a pultruded structure comprising a fiber-reinforced polyurethane thermoset resin;
• b) one or more tie layers, wherein at least one tie layer is an extrudable thermoplastic tie layer that is coextrudable with at least one of the pultruded a) or thermoplastic cap layer c), wherein said thermoplastic tie layer is selected from the group consisting of polyamides, copolyamides, copolyamide blends, block copolymers of polyamide and polyester;
• acrylic, stryrenic or butadiene-based block copolymers, functionalized olefins, functionalized acrylics, and acrylonitrile-butadiene-styrene (ABS) copolymer;
• and
• c) one or more thermoplastic cap layers, wherein said cap layer consists of a thermoplastic selected from the group consisting of acrylics, styrenics and thermoplastic polyurethane.