![]() It’ll keep the cement board from moving up and down. The reason for the layer of thinset between the cement board and the subfloor is to fill the voids/gaps between the two. What do you put under Hardibacker?Īn unmodified thinset (Masterblend) is fine between the Hardi and the subfloor. Pack in thinset, lay on the tape, and flat-knife to get it set in. If you are going to tile over the cement board, you should tape the seams. Do you have to tape cement board before tiling? For HardieBacker 500 cement board, use minimum 1-1/4” long corrosion- resistant roofing nails or ribbed countersinking screws. 18-gauge corrosion-resistant polymer coated 3/4” staples with a 1/4” crown. Minimum 3/4” long ribbed counter sinking corrosion-resistant screws. What kind of screws do you use for Hardibacker? The Hardibacker will be fine to tile straight onto. The ingredients in thin-set mortar ingredients are cement, fine sand and a water retaining agent. Thin-set dries slowly, allowing you to fix and readjust backer board sheets as needed. Use thin-set mortar when installing cement backer board. Why do I need thinset under backer board? Here’s how to add your tile over your HardieBacker Cement Board: 1. Installing HardieBacker Cement Board to a wooden subfloor is as simple as that! HardieBacker Cement Board can be used with nearly any kind of tile, whether ceramic, porcelain, or natural stone. Where HardieBacker board is being installed over a code-complying subfloor for the attachment of tile, the board is installed over a 3/32”-1/4” thick bed of bonding mortar and then nailed down. Part “1” How to install Tile Backer Board on wooden subfloor – plywoodĬan I use liquid nails or glue with HardieBacker® cement board? No. How do you install tile backer board on wood subfloor? Using thinset between the backerboard and subfloor will create additional strength, fill in any potential gaps that exist and lessen the possibility of movement. Thinset is going to create a solid surface under tile and prevent flexing that could lead to cracking. ![]() Do you have to put thinset between subfloor and cement board? Along the perimeter, screws should be installed at least ½ inch from the edge, but no more than 2 1/4 inches. All of your backer board pieces should be cut before they are placed on the floor. Apply a supporting bed of dry-set mortar or modified thinset to plywood with a 1/4 in square-notched trowel.ĭo not use drywall screws as they are not recommended to be used to hold the backer board in place. We recommend an 1/8 in gap from board edges. Score and snap boards to required sizes and make necessary cutouts. ![]() How do you attach Hardie board to plywood?ĭo not align HardieBacker cement board joints with plywood joints. ![]()
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