Fabricate nonmoving seams in copper sheet with flat lock seams.
How to seam copper sheets.
This video describes how to make a double lock standing seam with a seaming anvil and a hammer.
This type of seam is used wherever significant movement of the copper sheets is expected.
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For sheets up to 1 8 in.
6 4 mm or more.
The backhand method is preferred for thicknesses of 1 4 in.
3 2 mm thick a plain butt joint with squared edges is preferred.
Tin edges and cleats to be soldered form seams and solder.
It is arguably the most time proven type of roof panel seam.
When welding thin sheets the forehand welding method is preferred.