Traditional copper standing seam has been in use for about 1200 years. Our standard clamps are aluminum, which in the presence of an electrolyte (like rainwater) pose a distinct risk of galvanic corrosion (to the aluminum) if used on copper roofs. This is why we recommend using our brass S-5-B™ (or S-5-B-Mini™) clamps. The S-5-B is a brass clamp, matalurgically compatible and designed for traditional double-folded copper standing seam. It has been load tested on both 16 and 20 oz copper double folded seams.
Occasionally other standing seam profiles may be present in copper. If the copper roof in question does not fit within the slim throat of the S-5-B clamp, such as most snap-together profiles, another S-5!® product option is a the S-5-S clamp in stainless steel, which is quite compatible with copper. (Please note that this clamp may require manufacturing lead time.)
A final alternative for S-5-T™ and S-5-Z™ profiles is to utilize the aluminum clamps for these profiles, but anodize them prior to use.Anodization chemically induces formation of the oxide layer of the clamp components. Most respected metalurgists agree that this neutralizes the anodic behavior of the aluminum, reducing potential for galvanic corrosion.