2: Cut Box Sides

Using the adjusted measurements from the initial measurement stage, cut the shorter and longer sides of the main box.

I used a table saw for this, which ensured parallel edges. A circular saw or jigsaw would work, but I'd advise using a straightedge.

The "pointy" sides are the wider and longer strips.

Long, wider sides:

Short, narrower sides (note that measurements correlate with previous measurements, not directly from the plans.)

Now, draw the "point" on the long sides.

IMPORTANT: you will want a bit of overlap with the short sides, because you will be making a beveled edge.

Cut the pointy part of the long sides. I used a circular saw. A jigsaw would work too.

It's important that the edges be perfectly straight, so the roof will form a watertight seal: