Simply line up your chisel along the line you are going to cut and strike the back of it with a hammer.
Best method to cut sheet metal.
First if you want to cut a duct near the middle and use both ends mark and cut the duct before snapping it together.
Using a chisel and hammer is the most basic form of cutting sheet metal.
If you ve hit it hard enough the chisel will cut the sheet metal if it s thin enough.
Tin roofs are lightweight and soft by nature this is why cutting them manually with snips is a good option.
A handheld cutting tool fitted with a metal cut off wheel will easily cut through sheet.
Probably it s also the cheapest way for cutting corrugated tin roofing.
An angle grinder fitted with an abrasive metal cutting disc works well to cut all kinds of metal including bolts angle iron rebar and even sheet metal.
Start by taping both sides of the sheet metal directly over the line you want to cut and clamp the metal to a work station so it doesn t move.
The method you choose to cut sheet metal depends on the thickness of the metal and the type of cut you plan to make.
Straight cutting compound snips work best for cutting thick or doubled up sheet metal.
You could also use a circular saw to cut lots of sheets more quickly and a nibbler to create rounded cuts.
There are two ways to cut round ducts.
Instead we recommend using a diamond blade that s rated to cut ferrous metal.
The metal sheets used to form the roof need to be cut to fit your roof before you can install them but fortunately this is easy to do with a few different tools.
Use tin snips or shears to cut lengths by hand.
But the discs wear down quickly cut slowly and shrink in diameter as you use them.
To cut straight lines use an electric saw.
So the geometric cut is quite hard to do in this case.
There are modern laser machines available that can cut and format automatically once you set the track.
One of the fastest most precise sheet metal cutting methods is to cut with high power laser.
Snips are ideal for cutting any type of corrugated roofing especially for cutting softer metal like tin sheets.
