Start installing your boards a quarter inch above the floor, tub, or shower board and caulk accordingly. Cutting Cement … 3. Cement backer board (also called cement board), is probably the most commonly used backer board for use in ceramic and porcelain tile installations. Hi lads, this is following on from my post the other night where i have decided to use hardie cement boards instead of plywood due to the poor quality of ply now available. Or should I put down the HardieBacker cement board first and then the LevelQuik products? Spread the mortar to about 3/16" thickness. It may happen, however, that the tiles are set too close to the edge to allow you to do this. How about thin set under the Hardie? Leave a 1/4″ gap between the backer board and walls and 1/16” gap between the sheets of backer board. Cement backer board is more dimensionally stable than plywood and forms a better bond with the thin-set adhesive used to glue the tile down. By not worrying about the level I only had to use a small amount of the compound to fill the 'dip'.

I just completed installing 1/4" HardiBacker over a plywood subfloor in my master bath in preparation for installing 12x12" porcelain tile. Level might require 1/2"-3/4" or? Fasten cement board with specified nails or screws, a maximum of 8” on center at all supports. Constructed primarily of cement and reinforced with fiberglass, this type of board is waterproof and so is mostly used for tiled shower surrounds and enclosures, wetrooms and … Cement backer board was developed first to replace the cement mud and metal lath systems installed by real craftsmen. This layer was mortared to the first with thin-set. The FloorElf describes the proper method of installing cement or cementious backerboards on a floor for tile installation. If shimming the floor up to level isn't an option than at the minimum fill the void with floor leveler first, let cure, and than install cement board. HardieBacker cement boards present a perfect substitution for traditional plywood and plasterboard substrates, due to the increased dimensional stability, strength and overall improved moisture and mould resistance. Add more mortar as necessary to fill sunken areas in. Before attaching the backerboard, use the straight edge of a level to make sure that stud faces are all on the same plane. I put durock backer board over the subfloor however when I started dry laying the tile I noticed there is one ... is to pour some self leveling compound in the corner sloped area which is only about 24" x 24" to make the corner level and tile over that. Don't try to span the depression with only cement board it will eventually flex and the tile will fail. Cement board is a strong and durable material that is great for projects like tiling, flooring, and countertops. • Lightweight cement board for easier handling • Easy to cut and fasten • 30-year limited warranty Water durable and mold resistant, with better tile bond than fiber-cement boards or bare plywood, USG Durock ® cement board is an outstanding backerboard for a wide variety of reasons. How to Make the Transition From Cement Board to Greenboard. – Drew Steen Jun 12 '12 at 20:09 Cement board is a combo of cement and fibers that usually comes in 3×5 foot sheets. I did end up using leveling compound, but not self-leveler. Step 1 Measure the floor and determine if and where you can use whole sheets of the cement board. Turns out my floor is mostly flat (except for one dip), but far from level (maybe 1" slope over 6'). By "backer board" I assume you mean something akin to 9/16" glass mat cement backer board. 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