How To Seam Copper Sheets

It is arguably the most time proven type of roof panel seam.

How to seam copper sheets.

The weld should be started again and continued until the seam weld is completed. This type of seam is used wherever significant movement of the copper sheets is expected. Expansion and contraction are a function of temperature change material properties and the dimensions of the material. When welding thin sheets the forehand welding method is preferred.

3 2 mm thick a plain butt joint with squared edges is preferred. This video describes how to make a double lock standing seam with a seaming anvil and a hammer. Fabricate nonmoving seams in copper sheet with flat lock seams. For sheets up to 1 8 in.

The backhand method is preferred for thicknesses of 1 4 in. Where lapped or bayonet type expansion provisions in work cannot be used or would not be sufficiently water weatherproof form expansion joints of intermeshing hooked flanges not less than 1.