An oriented strand board-fiberboard composite structure comprising a plurality of layers of oriented strand board material, each layer loosely formed separately and disposed one above the other, wherein a top layer is a loosely formed oriented strand board core having wood strands of varying dimensions, and an overlay secured to the oriented strand board core such that the overlay does not delaminate upon weathering, said overlay formed into a loosely formed handleable dry-felted fiberboard mat including fibrillated wood fibers entangled sufficiently for handleability and, thereafter, hot pressed to consolidate the loose fiberboard mat simultaneously with hot pressing the oriented strand board core to consolidate both the oriented strand board core and the fiberboard mat and bonding the two layers together;
- said overlay including an embossed pattern pressed into its surface.