Take care the first piece is aligned precisely perpendicular square to the edge.
How to put on a metal roof yourself.
Install the roofing screws vertically along each rib in the panel.
Be sure the larger edge is laid so that the small edge of the next panel will overlap it.
If you want to install steel over asphalt your best choice for installing metal roofing is to use a steel shingle system like the one shown instead of the more common and more expensive standing seam steel.
Use your neoprene washer head screws to secure the metal to the sheathing.
Slide the edge up through the offset cleat so that it is fulling engaged and flush along the edge.
In a standing seam roof long single panels run vertically all the way from the eave to the ridge.
Apply a thin line of butyl tape sealant along the roof s ridge.
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.
Place the ridge cap over the roof.
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.
Make sure that the panel is sitting back from the edge of the roof by half an inch.
The ridge cap helps water to flow off of the roof.
Space the screws about 12 in 30 cm apart down the entire piece of metal.