Your shower surround keeps water from coming into contact with the wall behind it.
Tiling a shower wall over drywall.
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.
Traditional cement backer boards and fiber boards require some type of moisture barrier to be.
The wedi board wedi shower system includes special bonding agents referred to as wedi caulk though is much more than caulk that waterproofs the seams in the corners as well as the joints where the 3 5 board pieces join together.
Can i put backer board over drywall for shower tiling.
Sand the wall with 80 to 120 grit sandpaper on an.