Taping Backer Board Joints Floor

When you install backer board you will notice that the edges are tapered which allows the boards to meet and forms a small gap.

Taping backer board joints floor. Floor tiles should be installed over smooth flat surfaces. Don t skip this. But these problems can be avoided by this one simple step. The backerboard should completely cover the subfloor joints.

To achieve the ideal flat surface most contractors rely on the backer board cement backer board is a thin layer of concrete designed to be setting surface upon which tile can be installed. Step 1 fill the gaps. Alkali resistant mesh tape. Do a dry run and lay the backerboard down to fully cover the area you plan to tile.

In order to complete the. Here are the basics of taping backer board joints effectively. If needed cut the backerboard to fit in small spaces or around obstructions. Not using mesh tape on the seams of your cement board installation.

This is more of a little known fact but most cement board manufacturers want fiberglass alkaline resistant mesh tape embedded in thinset mortar over the backer board seams. However after you mount the backer board to the floor you simply have to seal the seams with mortar and wait until the mortar dries. Install additional two by four backing in the wall where the joint between backer board and drywall will be. Doing them improperly can lead to big problems down the road.

It is a very simple process and i used some fibatape and thinset mortar to seal the cement board j. When installing the backer board over a vinyl or resilient floor no mortar surface layer is required between the backer and vinyl. In addition to attaching it to the floor you also need to fix the seams between the boards with tape. Some backer boards will have the fastener locations printed on the board.

Score the board with a utility knife. In this video i show you how to tape cement board joints. For tile backer boards such as durock wonderboard hardiebacker permabase and others the seams between the board need to be treated with. This can be done prior to installing the extra drywall strip to close the space or screw a two by four to the back of the last drywall sheet.

This is normally 12 hours but may be up to 24 hours in some cases.