Do this until the entire roof is covered. Continue installing the metal panels, making sure that the edges overlap at least 1 in (2.5 cm), or as required, with the adjacent panel.If you over-tighten and the grommet is displaced, remove and replace. Tighten the fastener just enough to seal the site. Each fastener has a durable rubber grommet that seals the roof from the weather. For exposed fasteners, avoid over-tightening the fastener.Make sure that the screws are all aligned evenly, as you will be able to see them from the ground if they are exposed-fastener metal plates.Space the screws about 12 in (30 cm) apart down the entire piece of metal.
Take care the first piece is aligned precisely perpendicular (square) to the edge. Take your first sheet of metal and place it on the roof so that it overhangs the edge at least 3⁄ 4 in (1.9 cm). Always begin working at the point with the longest peak-to-eave distance.
