It is better to grab them a little in one place, align them relative to each other and the edge of the slope. The first row should hang from the eaves by 5 cm. You can start working from either the left or the right side. Fix the metal roofing. It is recommended to use only high-quality fasteners, since the service life of the roof directly depends on this. Self-tapping screws should ... https://bcellphonelist.com