Cement Board Meets Drywall At Outside Corner

How to make the transition from cement board to greenboard.

Cement board meets drywall at outside corner.

I will just end up painting it. Durock is a type of cement board that is water and moisture resistant. 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. Corner bead is most often associated with drywall.

Greenboard is a moisture resistant drywall product designed for use in areas of high humidity and where occasional incidental contact. The walls were easier because i had tile wrapping around the corner so i just taped and thinset those and tiled overtop. Outside corners can be difficult with 2 inch mesh tape. 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.

It s hard to get the tape to fold over the corner and stay long enough for the thinset to set up. In this video i will show you how to prep a corner bead and where cement board and sheet rock meet. They make 4 inch alkali resistant mesh tape and this stuff works great. The shower ceiling is hardibacker and the wall outside the shower is drywall.

Drywall is pressed gypsum which is used in modern walls as the surface material. These areas are pretty simple to prep but there are a few. At some point along the wall the cement backer board will meet with the drywall used in the rest of the room. Cement board is also used in the walls of showers and bath surrounds where there s going to be a lot of moisture.