Clean the siding around the hole with vinyl siding cleaner or dish detergent and water then dry the siding.
Cutting hole in vinyl siding.
When we cut with a circular saw we often install the blade backwards to minimize ripping and tearing of the vinyl.
Cut a scrap piece of siding to a length that is several inches longer than the hole.
Cutting the vinyl siding is easy.
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A hole saw tin snips etc will slice right through it.
For the smoothest cuts put the blade in.
The best way to cut vinyl siding circular saw.
You can also use tin snips to make crosscuts.
Place a strip of siding on the work table and align the place you plan to cut it with the edge of the table.
A clean way to cut vinyl siding is to score it with a utility knife and then bend the vinyl at the score.
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Make crosscuts on vinyl siding using a circular saw but you should install a vinyl cutting blade to minimize chip out.
When making longitudinal cuts score with a knife and break along the score line.
It should snap apart.
That said the hole is the least of your effort.