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The Gibraltar SM-Rib is a 16 ft. Galvalume steel panel with a 27-1/2 in. coverage width, made for both roofing and siding. The 29-gauge steel and Galvalume (zinc-aluminum) coating give it good corrosion resistance for barns, sheds, carports and outbuildings. It is a bare-metal panel, so it is cheaper than painted or thicker 26-gauge panels but needs care with fasteners and cut edges. Buyers pick it for quick, low-cost coverage on utility structures rather than for a finished house roof.
In stock
Lowest price we've seen: $65.63 on Nov 11 at Kelseyville Lumber & Supply Co. Tracked across 1 store since Nov 11.
Owners of this type of Galvalume SM-Rib panel generally report it goes up fast and holds up well on sheds and outbuildings. Complaints center on oil-canning, dents from handling and smudges on the bare finish.
This is a 16 ft. SM-Rib corrugated metal panel from Gibraltar Building Products. It is made of Galvalume steel, sold under the name Zinkalum, in 29 gauge.
The panel measures 27-1/2 in. wide by 16 ft. long. It is used for roofing and siding.