My tiler used fat mud to make the shower walls plumb flat.
Shower wall tile and joint with drywall.
The mud is drying tonight.
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.
Not only is it water resistant but blueboard is easy to find and inexpensive making it an ideal option for those on a budget.
Thicker than the drywall next to it and i don t have the tile on yet.
Thoroughly vacuum the area and give the wall a once over with a damp sponge or cleaning cloth.
These days that s almost nowhere.
If your tiles are in mortar break open a.
Blueboard is a type of drywall that is frequently used for a tile wall in a shower.
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.
It will be fine to tile over drywall in low moisture areas such as tiling around a fireplace.
Sand with a medium grit sandpaper to create a uniform surface that s not too smooth.
Tile adds a layer of moisture protection to drywall.
Your shower surround keeps water from coming into contact with the wall behind it.
The only place it s ok to use it is when tiling in non wet areas over drywall with small ceramic tile.
Run the drywall knife over the mortar to create a smooth finish and remove any excess material.
Now the mud is quot.
Furthermore blueboard is not difficult to install.
You want the tile adhesive to have something to grab onto.
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.
Seal the walls with a skim coat and let it dry thoroughly.
How much of a tile should bridge the backer drywall seam.
In areas of high moisture such as walls in a shower for long term durability it is not advised to install tile over drywall even if the drywall is type mr moisture resistant.
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.
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.
If you have a larger area break the tiles with a hammer and chisel or sledgehammer to get them off the drywall then unscrew and pull down the old panels.