After reclining the surface you need to estimate the cutting line by using a mark and a calibrated tape.
How cut roof house.
Because you have to control the panel while cutting the sheet.
Use a straightedge to help you transfer the angle you marked on the siding.
Peel off the bottom backing.
Then you put the metal roof on the sturdy surface and switch the underside face of the roof.
Measure the bottom piece of siding to the proper length which is the length of the wall to the roof line minus 2 inches.
Project step by step 15 roll out the self stick underlayment.
Lay the roofing sheets on a flat surface with the underside up.
Flip them so the proper side faces up before you pin them in place with adjustable clamps.
Stick on the underlayment.
To measure the roof accurately you should find a fixed surface.
Sheet metal shears with parallel or angled guillotine knives and a circular saw are often used for cutting of sheet metal onto strips or workpieces.
The underside is flatter than the top edge making it easier to cut across.
Before you start cutting you first need to determine how long your roof rafters need to be and the angles at which you ll cut the top and bottom of the rafter.
Measure the width of your building.
Protect the roof against ice dams and windblown rain with self stick ice and water.
Find a stable surface like a workbench you can use to cut the sheets without moving them.
If there is an issue how to cut corrugated metal roofing the most reliable option would be using electric scissors.