Cement Board Drywall Joint Tape

Tape and mud the joints.

Cement board drywall joint tape.

Mesh cement board tape. Cover all of the corners joints and seams including the joint where drywall and cement board meet with the fiberglass mesh tape. This self adhesive tape is made from the same vinyl coated fabric that is embedded in the face of some cement boards to give the board added strength and crack resistance. The joint between cement board and greenboard is similar to the joint between two pieces of cement board or two pieces of drywall.

This video transition between cement board and drywall joint or how to tap drywall and cement board joint or tapping cement board and sheetrock shows the tra. Apply a length of mesh style self adhesive drywall tape lengthwise over each of the seams that are between the drywall and the cement board rolling the sticky side of the tape out along its length and pressing it firmly to the surface with your palm. I cracked the corner of the cement board while cutting it see pic and this tape is the perfect fix. Mix more thin set mortar and cover the taped joints with a thin layer using a drywall knife similar to mudding drywall joints.

Push the mortar through the mesh tape and into the 1 8 inch space between the backer board and the drywall. I ve use fiberglass drywall tape before and this tape seems to be easier to use than others. Spread joint compound over the length of the tape with a 6 inch drywall knife. Roll alkali resistant self adhesive.

Cement board tape is a patented alkali resistant fiberglass mesh tape and the only tape that should be used for cement applications with dry or thin set mortar. Very adhesive and very easy to cut with household shears. Screw the drywall to the studs. Mix thin set mortar according to the manufacturer s instructions and apply a thin coat over the fiberglass tape with a drywall knife.

Complete the job by piecing in any missing drywall and taping the seams. Apply cement board joint tape to all of the joints between sheets adhering the tape with its self adhesive backing. Qep 2 inch x 150 foot cement board drywall tape 99605q is perfect for my cement board project.