Installing Floor Trim Inside Corner

Installing baseboard trim is a challenging endeavor that takes years of practice to become proficient.

Installing floor trim inside corner.

Continue to cut and install trim until reaching the end of the wall. Coped joints are ideal for inside corners. The technique described here modified for diyers will also work for other trim moldings such as door and window case moldings or chair rail moldings. Cut the trim square if it butts into.

Use a coping saw to trim out excess material behind the cut so the pieces fit snugly. Trim at inside corners often won t meet evenly despite a perfectly cut cope. One remedy for this problem is the use of corner blocks. 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.

For inside corners cut the piece to length at a 45 degree angle with a miter saw. Cut the inside corner of the last piece at a 45 degree angle and continue around the room. 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.