Take care the first piece is aligned precisely perpendicular square to the edge.
How to put a metal roof on my house.
Can you put steel roofing over asphalt.
Try to space the screws about 12 inches apart down the entire piece of metal.
5install metal panels or shingles.
Moreover try to ensure that the screws are all aligned evenly.
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In a standing seam roof long single panels run vertically all the way from the eave to the 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.
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.
Install the roofing screws vertically along each rib in the panel.
Space the screws about 12 in 30 cm apart down the entire piece of metal.
And for any exposed fasteners try to avoid over tightening them.
Here are some pros and cons.
Use your neoprene washer head screws to secure the metal to the sheathing.
Can you avoid tearing off your old asphalt shingle roof by putting a steel roof over it.
Be sure the larger edge is laid so that the small edge of the next panel will overlap it.
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.