Align the first metal roofing panel so that it overlaps the edging by 1 2 to 3 4 of an inch and is square to the roof line.
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Be sure the larger edge is laid so that the small edge of the next panel will overlap it.
So far this is the same process as for installing asphalt roofing.
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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.
The roof of the structure will need standard roof sheathing.
The main difference with steel is the need to use special nails which have washers mounted on them to seal.
Use the chalk line to snap a straight line vertically every 6 inches.
Take care the first piece is aligned precisely perpendicular square to the edge.
Always begin working at the point with the longest peak to eave distance.
Roofing building materials the home depot store finder.
Repeat this on both sides of the roof.
Install the roofing screws vertically along each rib in the panel.
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Use your chalk and tape measure to mark about 12 inches up on the roof for the first set of shingles.
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Every 5 inches make a new mark until you get to the rop of the roof.