In a standing seam roof long single panels run vertically all the way from the eave to the ridge.
Install metal roof over electric riser.
Be sure the larger edge is laid so that the small edge of the next panel will overlap it.
Metal roofing 101 diy steel roofing installation over shingles subscribe.
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.
Apply shingles up to lower edge of electrical mast.
Install the roofing screws vertically along each rib in the panel.
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.
Apply sealant to underside of base and secure base with roofing nails.
You also need to add.
Wrap flashing around electrical mast and close by crimping stainless steel clips supplied.
Then cover the entire roof with a layer of insulation and secure it with a staple gun.
Before you install metal roofing repair any damage to the wood under the shingles.