Abstract: A trim strip (10) includes an anchoring flange (16). A structural material cover (18) is coupled to the anchoring flange (16). The structural material cover (18) includes an upper cover member (20) and a lower cover member (22). The upper cover member (20) covers a portion of an exposed structural material layer (25). The lower cover member (22) has a structural material flush mounting surface edge (26) and covers a portion of a structural material sub-layer (28). A method of forming a multiple layer structure (15) includes applying a compound structural material cover and intermediate trim strip (10) to a peripheral edge (64) of the sub-layer (28) and applying the exposed structural material layer (25) to the sub-layer (28) and to the compound structural material cover and intermediate trim strip (10).