When adding or repairing a canopy on your building, it is recommend that you avoid the use of corrugated metal with a squared off profile. The appearance is not historically correct, gives the impression of inferior quality, and lacks visual appeal.
The underside of the canopy can be exposed or solid. Wood bead board can be used to cover the canopy structure. Recessed lights can then be placed to illuminate the sidewalk.
Historically, sheet metal canopies were rolled and had a curved appearance. Flat metal sheets were connected by a standing seam. Decorative pressed metal tiles were less common on the exterior of a building, but often used inside.