Prepare for Vertical Corner Trim

What happens here

Once the horizontal siding panels have been installed up to the desired height along the corner, ensure that the corner edges are clean and ready for trim. Use a long level or a straight edge to verify the plumb (vertical) alignment of the corner, ensuring that the final corner trim piece will sit straight and flush. Although not explicitly shown, this step typically involves measuring the exact height required for the vertical corner trim and marking the trim piece for any necessary cuts to ensure a precise fit from the base to the top of the wall.

Goal: After horizontal siding is installed, this step involves checking the vertical alignment of the corner where the trim will be placed and potentially marking cut lines for the trim piece.