The scrap piece should be about 1 foot long.
Trim work around stairs.
Cut the scrap piece at a simple 90 degree angle.
Baseboard trim can be cut with mitered corners and follow the angles of each tread and riser.
Diy instructional video to make the perfect miter cut for your stair trim.
Whether the stairs install between two walls or have one open side with handrails 3 4 inch.
Adding trim between the stairs and drywall hides any gaps and adds architectural value to a staircase.