Copper-coated stainless steel
Prefinished galvanized steel
Zinc, Zinc-tin-coated copper, Zinc-tin-coated stainless steel, Zinc-tin-coated steel
All of the options are metal types used in roofing
Appearance and color durability (fading and chalking resistance)
Film integrity and adhesion (peeling and chipping)
Hardness (scratch resistance)
Flexibility (which relates to formability of a coated metal)
Chemical and general corrosion resistance
Solar reflectance and thermal emittance
Accelerated corrosion of a metal because of an electrical contact with a more noble metal or nonmetallic conductor in a corrosive electrolyte
The negative direction of electrode potential.
The positive direction of electrode potential.
A measurement under an open-circuit condition.
Residual stress during coil production can contribute to camber, the deviation of a side edge from a straight line. This longitudinal curving will place additional stress on metal as it is pulled through a roll-forming machine, which attempts to form a straight edge on the panel.
Slitting a master coil can release and redistribute stresses, especially if the slitter blades are out of adjustment or dull.
Roll-forming equipment can cause oil canning. As metal is run through rolling stations, it is placed under stress and can stretch, particularly if the equipment is out of adjustment or operated beyond its limitations.
All of the options are causes.
Electromagnetic heat welding
Crimping and locking
Soldering or welding
Single-Lock Standing Seam
Overlap Standing Seam
Durable nonporous materials
Compatibility with the adjacent materials; if not, an isolation sheet or coating may be required to separate incompatible materials
Proper support—either continuous support, such as wood blocking, or intermittent supports
Adequate joinery—to prevent moisture infiltration
Proper slope—to drain water (preferably to the interior side) from the top surface
Adequate overlap on each vertical face—to prohibit moisture infiltration
Secondary, continuous sheet membrane liner to provide secondary weatherproofing unless weathertight joints, such as double-lock standing seams, are used
Coping should have all of these options.
Metal choices are typically weather specific. Check your climate code for appropriate metal recommendations.
Refer to the minimum metal thickness guidelines for flatness and weatherability - Copings in the NRCA manual
Check with the contractor with the best gut feelings.
Whichever metal allows the greatest profit on the job.
Through-wall Reglet Receiver and Counterflashing
Insert Reglet Receiver and Counterflashing
Two-piece Surface-Mounted Receiver and Counterflashing
Behind Cladding Receiver and Counterflashing
One-Piece Surface-Mounted Counterflashing
20-gauge galvanized steel, 20-gauge prefinished galvanized steel, 20-gauge stainless steel
22-gauge galvanized steel, 22-gauge prefinished galvanized steel, 22-gauge stainless steel
24-gauge galvanized steel, 24-gauge prefinished galvanized steel, 24-gauge stainless steel
26-gauge galvanized steel, 26-gauge prefinished galvanized steel, 26-gauge stainless steel
A = 2", B = 2", C = Length = Exposure + 4"
A = 4", B = 4", C = Length = Exposure + 4"
A = 4", B = 4", C = Length = Exposure + 2"
A = 6", B = 6", C = Length = Exposure + 6"
A = Appropriate Fastener at 2" O.C., B = Gasketed Fastener at 12" O.C.
A = Appropriate Fastener at 4" O.C., B = Gasketed Fastener at 14" O.C.
A = Appropriate Fastener at 6" O.C., B = Gasketed Fastener at 18" O.C.
A = Appropriate Fastener at 8" O.C., B = Gasketed Fastener at 20" O.C.
Here's an interesting quiz for you.