quarter pannel install questions

Another problem with lap welds is the metal is efectively thicker where the lap occurs. This can lead to problems later on when the panels heat up in the sun and expand and contract. Basicly the metal expands at different rates and sometimes the seams can become visible. A butt weld is more likely to expand and contract at the same rate as the original panel. Once you learn how to butt weld in a quarter and control the warpage it is the only way to go.