I would cut from the outside on top of the vinyl siding not sure where you are if it s too cold outside but the vinyl siding may crack beyond the hole s diameter you are trying to cut it from the inside.
Cut hole vinyl siding.
The blade you want to use is a general purpose blade that can cut wood metal this will also work on vinyl but be careful regardless of which blade or tool you use if there is too much heat built up on the blade during use the vinyl may melt the vinyl.
That said the hole is the least of your effort.
Clean the siding around the hole with vinyl siding cleaner or dish detergent and water then dry the siding.
Place that strip of vinyl siding so that the piece and the line you want to cut are slightly off the.
With a pencil and measuring tape mark.
Make crosscuts on vinyl siding using a circular saw but you should install a vinyl cutting blade to minimize chip out.
Make the line as dark as possible so it s visible when you re cutting it.
Mark the line you want to cut on the siding with a pencil.
This method is best for cutting a lot of short or long vertical cuts since the circular saw will create clean incisions relatively quickly.
Cutting the vinyl siding is easy.
When making longitudinal cuts score with a knife and break along the score line.
When we cut with a circular saw we often install the blade backwards to minimize ripping and tearing of the vinyl.
Follow these steps on how to cut vinyl siding with a circular saw.
Cut a scrap piece of siding to a length that is several inches longer than the hole.
A hole saw tin snips etc will slice right through it.
A clean way to cut vinyl siding is to score it with a utility knife and then bend the vinyl at the score.
Place a strip of siding on the work table and align the place you plan to cut it with the edge of the table.
You can also use tin snips to make crosscuts.
First lay a strip of vinyl siding onto a flat and clean working table.
The best way to cut vinyl siding circular saw.
Use tin snips or a rotary tool to make curved cuts.
Not just any circular saw blade will do.
If you re cutting dark vinyl siding use chalk or light colored tape to mark the line you want to cut.
Fit a circular saw with a fine toothed plywood cutting blade.
For the smoothest cuts put the blade in.
You ll need a fine tooth plywood saw blade to do this correctly.
Use a carpenter s square to draw the line straight.
It should snap apart.
A siding zip tool pops the piece off from the bottom edge.
Holes an inch or two across or long narrow holes that still appear patchable require removing the damaged piece of vinyl to fix it.