Skirting

Using a level, or plumb bob, or laser if you’re fancy, you spike the bottom rail into the ground, in plumb (directly below) with the top rail. In practice, being a little bit off of plumb, do to blocks or footings coming too close to the edge of the home isn’t an issue.

You cut panels to the height needed by measuring from the bottom of the bottom rail, to the middle of the top back rail. Cutting skirting panels can be accomplished in many different ways. For one time jobs, or small projects, a pair of tin snips are adequate to get the job done. For faster production, multiple panels can be cut at one time with a circular saw fitted with a many toothed blade, or abrasive blade. I’ve gotten away with using a regular framing blade on warm days! Once you have enough panels to cover twelve linear feet, you put the first one into the bottom track then slide the next one into it with the locks running down the side. Continue this process until you have twelve or more feet.

You snap/slide in the top front piece to hold it all together!
Going around corners can be a bit confusing, but I’m attaching the instructions directly from the manufacturer here. The jist of it is, the panels get a straight bend where they reach a corner, and the top front rail and bottom rail has a small wedge shaped piece cut off the top and bottom, allowing it to easily fold around the corner.