Thoroughly vacuum the area and give the wall a once over with a damp sponge or cleaning cloth.
Shower wall tile and joint with drywall.
Furthermore blueboard is not difficult to install.
Sand with a medium grit sandpaper to create a uniform surface that s not too smooth.
What do i do.
Mix thin set mortar according to the manufacturer s instructions and apply a thin coat over the fiberglass tape with a drywall knife.
How much of a tile should bridge the backer drywall seam.
Run the drywall knife over the mortar to create a smooth finish and remove any excess material.
The only place it s ok to use it is when tiling in non wet areas over drywall with small ceramic tile.
Blueboard is a type of drywall that is frequently used for a tile wall in a shower.
Tile adds a layer of moisture protection to drywall.
While it probably does a decent job the drywall above the surround may suffer from water that sprays up or from moisture that accumulates on the drywall.
These days that s almost nowhere.
My tiler used fat mud to make the shower walls plumb flat.
Push the mortar through the mesh tape and into the 1 8 inch space between the backer board and the drywall.
It will be fine to tile over drywall in low moisture areas such as tiling around a fireplace.
If your tiles are in mortar break open a.
The mud is drying tonight.
I ended up with seam aprox 30 1 2 inches and planned take tile or bullnose out to about 33 intent was to use daltile rittenhouse artic white as best white for my situation 3 6 subwayplus bullnose but that puts the joint at or just a smidgen of tile over that seam.
Now the mud is quot.
Thicker than the drywall next to it and i don t have the tile on yet.
You want the tile adhesive to have something to grab onto.
I wanted a flush transition from my shower tiles to the drywall using a bullnose tile that matches my 12x24 shower wall tiles.
In areas that are exposed to an abundance of moisture it is better to install a cement board as a backer rather than a gypsum board.
Seal the walls with a skim coat and let it dry thoroughly.
Not only is it water resistant but blueboard is easy to find and inexpensive making it an ideal option for those on a budget.
The bottom line is that drywall and this includes moisture resistant drywall should never be used behind tile in wet areas showers and tub shower combinations.
Don t use tile mastic in wet areas like showers over cement board fiber cement board kerdi floors or with glass tile large format porcelain tile natural stone or most anywhere else.