Installing Floor Trim Inside Corner

Cut the inside corner of the last piece at a 45 degree angle and continue around the room.

Installing floor trim inside corner.

Cut the trim square if it butts into. The angled cuts the slope of the floor and the irregularity of the walls all work against you as you try to get those tight even corner joints. I know a few drywall finishers who don t like to bend over. Use a coping saw to trim out excess material behind the cut so the pieces fit snugly.

One remedy for this problem is the use of corner blocks. For inside corners cut the piece to length at a 45 degree angle with a miter saw. But room corners sometimes vary slightly from perfect 90 degree angles and professional trim carpenters have a number of tricks they use to ensure that baseboard moldings fit perfectly. Trim at inside corners often won t meet evenly despite a perfectly cut cope.

Coped joints are ideal for inside corners. When it comes time to install trim around the corners of your room or walls longer than the typical run of trim use these three joints. Installing baseboard trim is a challenging endeavor that takes years of practice to become proficient.