Install Longer Panels First: When installing siding on each side of a window or door, start on the side that needs the longer panels. Longer siding panels don't stretch as readily as smaller ones, so they're not as easy to adjust if they get out of whack.
This article explains how to install vinyl siding so that it looks good and doesn’t leak. Included is a discussion of trim options for corners, eaves, and doors and windows, as well as the author’s proven techniques for layout and installation.
13 Simple Vinyl Siding Repair and Installation Tips | The Family Handyman. Get the details right when you install vinyl siding and you'll save yourself hours of frustration later on. These 13 simple tips will help