Cement Board Drywall Outside Corner

Cover and mortar the seams with fiberglass seam tape.

Cement board drywall outside corner.

Cement backerboard is a thin layer of concrete with fiberglass mesh on both sides. After pressing the boards into the mortar screw them in with screws made especially for cement backer board installation. Keep the cement backer boards about 1 4 inch apart. It s available in sheets of many sizes with 3 foot by 5 foot sheets being the most common.

Where these two meet what is the proper way to finish it so it s a nice corner. This joint needs to be flush and smooth in order for the tile or other wall covering to be installed correctly and to create a professional finished appearance. The cement board is on the wet area the drywall is on the dry area forming an outside corner. It is a long strip of corner piece made out of aluminum paper or vinyl and is installed over a drywall corner giving the drywall a finished and professionally done look.

Are you saying just use the metal paper corner bead install with drywall mud even on the cement board. I need to finish the outside corner above the shower alcove. I will just end up painting it. Durock is a type of cement board that is water and moisture resistant.

Corner bead is most often associated with drywall. Just as you would with drywall make sure the screwheads are slightly depressed below the cement backer board surface. The shower ceiling is hardibacker and the wall outside the shower is drywall. Then just tile over the mud with thinset tile.