Cement Board To Drywall Ceiling

Cut drywall to fill in between the existing wall or ceiling and the cement board.

Cement board to drywall ceiling.

Drywall joint compounds must not be used directly over cement board unless it is properly sealed. How to make the transition from cement board to greenboard. Cover and mortar the seams with fiberglass seam tape. After pressing the boards into the mortar screw them in with screws made especially for cement backer board installation.

8 mm 5 16 thickness should not be used for walls or ceilings. Complete the job by piecing in any missing drywall and taping the seams. Prevents the spread and speed of fire. Screw the drywall to the studs.

Furring strips are long strips of wood that measure 1 inch thick and usually 2 or 3 inches wide. All the insider information on how to build and waterproof a. Keep the cement backer boards about 1 4 inch apart. At some point along the wall the cement backer board will meet with the drywall used in the rest of the room.

Not recommended for vinyl flooring. The cement board can be extended past the tile and taped and finished similar to drywall. Furring strips allow an air gap between the drywall and concrete to allow air to move and prevent mold. Cement board is also used in the walls of showers and bath surrounds where there s going to be a lot of moisture.

Keep in mind that large format tile requires a straight plumb and planar wall to avoid lippage. When installing drywall onto any concrete surface including a ceiling you need to install furring strips. Greenboard is a moisture resistant drywall product designed for use in areas of high humidity and where occasional incidental contact. In high moisture shower areas such as shower enclosures use cement backer board.

Just as you would with drywall make sure the screwheads are slightly depressed below the cement backer board surface. I use setting type drywall compound on that as it resists water better. Drywall is pressed gypsum which is used in modern walls as the surface material. Fire resistant drywall boards are crafted with glass fibers in an extra thick design that makes them ideal for use in utility rooms garages and areas near a furnace or wood stove.

Cover all of the corners joints and seams including the joint where drywall and cement board meet with the fiberglass mesh tape. Cement board is much heavier and harder to work with than drywall but it is almost completely waterproof.