Cement Board Meets Drywall At Outside Corner

These areas are pretty simple to prep but there are a few.

Cement board meets drywall at outside corner.

The shower ceiling is hardibacker and the wall outside the shower is drywall. 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. Cement board is also used in the walls of showers and bath surrounds where there s going to be a lot of moisture. Corner bead is most often associated with drywall.

The walls were easier because i had tile wrapping around the corner so i just taped and thinset those and tiled overtop. How to make the transition from cement board to greenboard. In this video i will show you how to prep a corner bead and where cement board and sheet rock meet. Where these two meet what is the proper way to finish it so it s a nice corner.

Durock is a type of cement board that is water and moisture resistant. Outside corners can be difficult with 2 inch mesh tape. I will just end up painting it. Greenboard is a moisture resistant drywall product designed for use in areas of high humidity and where occasional incidental contact.

They make 4 inch alkali resistant mesh tape and this stuff works great. At some point along the wall the cement backer board will meet with the drywall used in the rest of the room. If you have outside corners to do then you may decide to just get the 4 inch mesh tape only and use it anywhere you. It s hard to get the tape to fold over the corner and stay long enough for the thinset to set up.