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. Coped joints are ideal for inside corners. That s generally because corner tape joints don t always get filled or sanded all the way to the floor. 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.

Trim at inside corners often won t meet evenly despite a perfectly cut cope. I know a few drywall finishers who don t like to bend over. Installing baseboard trim is a challenging endeavor that takes years of practice to become proficient. For inside corners cut the piece to length at a 45 degree angle with a miter saw.

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. 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. Continue to cut and install trim until reaching the end of the wall.