I … It sounds like the subfloor needs help too. HardieBacker boards must be flush with subfloor during installation. Wood Strip, Board, or Plank Subflooring These subfloors must meet structural requirements. I am planning on installing 1/2" plywood on top of planks and 1/4" backer board for the 1/4" tiles. HardieBacker® cement board is made better to install better and perform better. That’s why it was named the most preferred brand of backer board by tile installers and contractors, according to the 2019 Tile and Stone Report conducted by ClearSeas research in partnership with the National Tile Contractors Association and TILE Magazine. You need to put a layer or plywood, minimum 5/8 IIRC, over those boards, then mortar the backer to the plywood. Let’s dive into the installation process. The result of Schluter-DITRA’s performance is a tile floor with outstanding durability and resistance to cracks and moisture. Out with the OSB. Backer board over hardwood may last a bit longer but I wouldn't do it. Not Staggering the Seams. Using the screw pattern as a guide, fasten your HardieBacker Cement Board with nails or screws every 8” on center over the entire surface. Placing cement boards over the concrete subfloor is an excellent way to create a solid and smooth subfloor. Plan so the joints in the backerboard won’t line up with the joints in the subfloor. Toilet flange is 1-1/4" above plank subfloor so these measurements would seem to add up ok, I hope. Hardie, or any CBU without thinset under is a fatal mistake that will results in … Regardless of whether the subfloor is single- or double-layer, Armstrong Flooring recommends the following: • If the top layer is tongue-and-groove and the strip wood is 3" or less in face width, cover with 1/4" or thicker underlayment panels. It has to be rock solid before you lay the 1/2-in. You would need at least 1/2″ concrete backer board that would require thin set and to be screwed down. Now, this is an area that the plywood installers will be familiar with. Also, did you use thinset between the ply and the Hardibacker? The old-fashioned mud method of floating a thick mortar bed in preparation for the tile has given way to using cement backer board over a plywood subfloor. 1. On all our jobs where we use Durock for floor tile we install 1-1/8" Advantech with joists 16" OC. The main floor is actually the second floor of the house so it's built from 3/4 inch tongue and groove plywood o… The antifracture membrane would assist with any movement in the subfloor, where the backer board assists with any flex in the subfloor. The majority of the subfloor is in good shape and sturdy. Apply a supporting bed of mortar or modified thinset to your subfloor with your trowel. When subfloors are nailed in place, the floor can become extra squeaky, either almost immediately or over time. I believe he needs to beef up the sub-floor with 1/2" ply screwed/glued down over … Aug 30, 2019 - Explore Bill Perkins's board "plywood subfloor" on Pinterest. I have that in my residence. Return to the corner and fasten in a diagonal pattern from that corner until the board is completely fastened. Do a dry run and lay the backerboard down to fully cover the area you plan to tile. I've removed the old floor covering and discovered that we've got a subfloor that consists of 3/4" thick, 7" wide wood planks spaced about 1/4" to 1/2" apart. I am hoping to use Custom Building Products Wonder Board 1/2 in. This underlayment also acts as a waterproof membrane over moisture-sensitive subflooring such as plywood and OSB. Then install a 3/8" minimum ( 1/2" is prefered ) plywood CDX underlayment over your plank subfloor by stapling well with a 16 gauge x 1/2 crown contruction stapler. He swore up and down this would be a perfect floor, no additional ply, thinset, etc were needed. When installing vinyl plank flooring over existing floor materials, underlayment may not be required, but it can help with cushioning and sound reduction. What subfloor should HardieBacker® cement board be installed over? The hardwood flooring must be installed crossing the subfloor boards (90 degree angle). We tore out all the hardwood and put in 3/4 t&g plywood glued, mudded 1/4 fiberock and … However, a homeowner may need to raise the floor slightly before installing tile and lack the experience or time to install a mortar bed. DITRA is also noted for its ease of use when compared with materials like cement backer board. Contractor is trying to talk me into replacing the existing diagonal plank subfloor from when the house was built in 1950. I went back to Lowe’s and picked up DUROCK cement backer board instead, plus thinset, the proper screws , and alkali-resistant fiberglass mesh tape . I'm curious to know what type of 3/8" plywood you installed. Using a sliding motion, firmly and evenly embed your HardieBacker Cement Board in the wet mortar. thick cement board. This is a small bathroom measuring 60" x 104" Joists are 16" on center. Re: Installing tile over diagonal solid subfloor Even if the 1x10 is a true 1" I don't believe it will be sufficient. If the subfloor is wood, won't the thinset cause the wood to get moist and possible rot over time? If the tile is being installed in a bathroom, consider applying an isolation membrane over your wood subfloor to further protect against expansion and contraction. The minimum subfloor specified is 5/8" exterior grade plywood or 23/32'' exterior grade OSB subflooring. Once your subfloor is good to go it’s time to install the DITRA. 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