Any material will have expansion and contraction, especially the high thermal expansion rate of metal materials. Therefore, how to allow the roof panel to expand and avoid the deformation or tear caused by the expansion of the leakage caused by the problem is critical. The only fixed point standing seam metal roof panel, the fixed seat also only limited plate cannot move in the width direction, the roof panel can be freely telescopic in the length direction, and thus does not produce temperature stress.

The metal roof common edge flashing expansion problem, using EPDM and flashing telescopic adhesive tape special welding, ensure the waterproof function of flashing can expand freely without affecting the roof.