Mix the thin set mortar.
Join drywall and concrete wall.
At some point along the wall the cement backer board will meet with the drywall used in the rest of the room.
Drywall is pressed gypsum which is used in modern walls as the surface material.
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.
Covering this gap isn t a difficult process.
Cement board is much heavier and harder to work with than drywall but it is almost completely waterproof.
When the ceiling changes height across the length of a wall a gap between wall and ceiling can result.
During a drywall installation contractors affix large sheets of gypsum board to the wall s framing tape the seams between boards and then cover the tape with joint compound.
Load up a small amount of joint compound onto the drywall knife.
Use concrete nails and a concrete nail gun to attach the hat channels to the wall after drawing a plumb line to make sure you ve spaced the hat channels properly for the size of drywall and insulation you re using.
Above the concrete walls are 2x6 wood framed walls.
The wood is anchored to the concrete and separated with a sill gasket.
A four foot tall concrete wall runs along the parts of the garage that are below grade.
How to drywall over concrete with a vapor barrier.
Placing drywall often means dealing with walls and ceilings that aren t exactly plumb in all areas.
Hold the knife at a 45 degree angle to the wall.
Likewise concrete transfers.
The tiles will hide the joint and make the job of finishing the drywall easier.
Apply joint compound over the tape with a drywall knife.
Cement board is also used in the walls of showers and bath surrounds where there s going to be a lot of moisture.
Extend the compound out from the tape on either side by about 1 2 inch on each side.
Leave a 1 4 inch gap between the greenboard and the cement board during installation.
Smooth the compound over the tape in a very thin layer.
Think of it like a large wick in an oil lamp or a semipermeable cell membrane that allows the transport of water.
There is a 1 2 inch ledge so the drywall will be flush with the concrete.