Next use 1 inch nails to secure some metal edging to the perimeter of the roof.
How to install steel roofing on a house.
Before you install metal roofing repair any damage to the wood under the shingles.
If you want to install steel over asphalt your best choice is to use a steel shingle system like the one shown instead of the more common and more expensive standing seam steel.
Then cover the entire roof with a layer of insulation and secure it with a staple gun.
Install the roofing screws vertically along each rib in the panel.
The good news is that there are many different solutions in terms of installing metal roofing panels including tin aluminum and steel.
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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.
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.
Be sure the larger edge is laid so that the small edge of the next panel will overlap it.