This is a basic vinyl siding skill to learn - to cut 90° without marking it. It will save to time in the long run. In this case in wouldn’t make sense for me to set up a cutting table and go down a ladder just to cut a few pieces. Every installer will go through situations like this where it’s quicker to just cut a few pieces yourself than to call out a measurement and wait for the cut guy to cut it and get it to you. Many won’t agree with me but that’s ok. I’m just sharing my experience from ma

How to cut vinyl siding without cracking it