As long as the plywood under the shingle roof is in good condition this way can provide many benefits.
Quick easy way to install metal roofing.
When framing a roof whether metal shingled or shaked it must be square.
Moreover try to ensure that the screws are all aligned evenly.
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.
When covering the roof with plywood or metal sheets it s necessary to fit the materials to the rafters exactly.
Be sure the larger edge is laid so that the small edge of the next panel will overlap it.
And for any exposed fasteners try to avoid over tightening them.
The offset cleat allows us to create a true hidden fastener installation.
3 install 1x4 purlins down over the shingles before installing the metal roof the third way to install a metal roof over shingles is by applying 1x4 purlins over the shingle roof.
This is by far the most common way to install a metal roof.
You can learn more about installing eave trim and offset cleats in another one of our metal roofing installation videos.
You will use metal roofing screws to secure the metal panels to the sheathing.
In a standing seam roof long single panels run vertically all the way from the eave to the ridge.
Try to space the screws about 12 inches apart down the entire piece of metal.
If you need to cut the sheets you can use an angle grinder a circular saw or tin snips.
You can either buy large metal panels of up to 32 feet in length and then cut them to the right size or you can purchase pre cut metal panels at a home improvement store that may be only 10 or 12 feet in length.
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.
Squaring metal roofs is relatively easy and required for proper installation.
Next use 1 inch nails to secure some metal edging to the perimeter of the roof.
Before you install metal roofing repair any damage to the wood under the shingles.
Metal roofing 101 diy steel roofing installation over shingles subscribe.
A square roof is one in which all the corners are constructed at 90 angles.