32–36 inches from the floor (or 1/3 of wall height). Lower (24–30 inches) for a more traditional wainscoting look.

Home improvement stores: Home Depot, Lowe’s (pre-primed options). Lumberyards: For custom wood profiles. Online: Etsy, eBay (for vintage millwork).

Use a miter saw: Set to 45° for standard corners. Coping method: For tight inside corners, cut one piece straight and "cope" the mating piece. Test cuts: Always check fit before nailing.