How are sheet copper roofs typically jointed?

Sheet copper roofs are commonly jointed using standing seams or solder. Standing seams are vertical joints that not only provide structural integrity but also enhance the roof's aesthetic appeal. The seams are raised above the level of the roof panels to allow for expansion and contraction due to temperature changes, preventing warping or damage to the panels.

Soldering is frequently used to seal joints between copper roof panels, creating a watertight bond that ensures durability and longevity. This method is preferred in applications where water tightness is critical, and the aesthetic seamless look of soldered joints aligns well with the traditional appearances expected in high-quality copper roofing.

Other methods, while they can be used in different roofing materials, do not offer the same combination of flexibility, durability, and esthetics as standing seams and solder do in sheet copper roofing. Overlapping seams are common in other materials but may not provide the same level of waterproofing or expansion capability as the other two methods. Welded joints and riveted panels are used in specific applications but are less common for sheet copper roofing where flexibility and traditional aesthetics are needed.