To cut the aluminum you can use a metal cutting blade with the jigsaw.
Cutting aluminum gutter downspout.
Because aluminum is soft and very pliable the cutting should be very easy and smooth.
Plug in the saw and squeeze the trigger button.
Cut all the way through at a consistent speed.
Now that you ve finished cutting the old downspout is ready to be replaced.
This video is about helpful hints cutting the downspout.
Away from the cutting area to prevent injury.
Step 2 drill four holes in each corner of the outline you made of the sleeve drill one hole.
This video is about helpful hints cutting the downspout.
Wear protective glasses and gloves and keep all loose jewelry hair etc.
Then work the tin snips through the downspout and cut along the line until you ve completely cut through the downspout.
For cutting any kind of sheet metal tubing the weapon of choice.
Cut the downspout with your tin snips.
Crimp three times across both long edges and twice on the narrow sides.
Don t rush into cutting and maintain the cutting line straight.
This is the thing that connects the gutter and downspout together so it is important that it is placed correctly and securely.
Once you have marked the correct length on the downspout lay it down on a flat surface that has the proper clearance for cutting.
Sheet metal pros use double cut tin snips either hand type or electric depending on work at hand.
Begin your cut at one corner on the end you wish to make your cut.
Cut the closest corner to your first cut to the same spot.
There is simply no other way to make a nice clean cut in the middle of a 4 water heater vent for example or the downspout tubing in your case.
With the three blades on the inside of the tube hold the crimper against the inside corner of the tube and squeeze.
Cut up the corner to your closest measurement mark.
If you re using tin snips you ll want to use one of shears to poke a hole in the downspout along the line you ve marked when you measured.
This method doesn t produce the cleanest results.
On the bottom of the gutter itself take a pencil or marker and trace the outline of a sleeve.
When using a jigsaw as with any saw follow all proper safety precautions.
Repeat the process for additional cuts.
Opt for a workbench and clamps for extra stability.