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Does Cement Board Need Mortar?

Alexander Ross • • 6 min read
Does Cement Board Need Mortar?

Spread Mortar
Use thin-set mortar when installing cement backerboard. Thin-set dries slowly, allowing you to fix and readjust backerboard sheets as needed. ... It's used to bond ceramic or porcelain tile and cement backerboard.) With the smooth side of a 1/4-inch notched trowel, spread enough mortar for one sheet.

Do I need to mortar under cement board?

If so, then you should purchase what they require. But the system works by having a bed of mortar underneath holding the board up and fasteners from above holding the board down. You don't need any fancy mortar to accomplish that task.

Do I really need thinset under backer board?

Using thinset under cement board is a commonly skipped step amongst many contractors. ... However, many manufacturers including, both Durock and Hardiebacker not only recommend that you use thinset under their backerboard, but they specify it and will void the warranty on their product if it's not used.

Alexander Ross
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Alexander Ross

Alexander Ross has covered the video game industry for a decade, writing deep dives on game design, esports tournaments, VR developments, and gaming culture.