martinemj Well-Known Member. Hardibacker Installation Which Side Out Using Osb. I have a good subfloor going on (about 1.d inches), but the last two layers are 1/4 inch luan and linoleum tile. Sturdy OSB subfloor with a 1/4" cement board/Hardibacker nailed over the top with roofing nails (never screws) is best. Despite the fact that it is not fully waterproof, it is mold resistant. Then put down 1/2' plywood and then Hardibacker.and finally tile. The Tile Council of America has an installation specification (F155-03) for tile floors over OSB decking but it includes covering the OSB with 5/8" exterior plywood. Cement Board is a cement backerboard designed for use with floors and countertops. This means that Hardibacker can be used to underlay tubs and showers. But doing so is a very laborious, time-consuming process that is likely more trouble than it is worth. The thinset did not adhere well to the linoleum and the slight flexibility allowed the tiles to pop right off. I have 3/4" OSB subfloor that I want to tile over. OSB is incredibly more cost-efficient than plywood. Answered. If yes, what is recommended for under a woodburning stove. 11/1/2017 0 Comments Basement Flooring How To Insulate A Concrete Floor. You can put saran wrap over the particle board, then use thin set to level the floor. You can look at a light sanding with high-grit sand paper/drum/belt. Over that, I screwed in 1/4 hardibacker, no thinset beneath. Doing a tub tile repair. 1/4 in. Installing tile over a wood subfloor is a lot easier today than it was when I started my remodeling career. OSB is typically used in exterior construction, and is rarely used indoors. Hardibacker Installation Which Side Out For Osb. Finished tile floor installed over a plywood and cement backer board subfloor. 1. Most any plywood (even osb ) is an approved substrate for ditra. Can you tile directly over OSB? Need to re-install tiles after putting new section of backer board. Pulled out some old hardwood floor in a closet to convert to a bathroom. When butting HARDIBACKER ® sheets to 1/2' drywall, tack 1/4' thick furring strips to each stud. You could remedy this by removing the OSB and replacing it with 5/8" ply, or you could go over the whole thing with 3/8" ply. I'm not a big fan of Hardibacker or the other fiber cement boards for a number of reasons, but it seems to be the one that gets used the most by DIY'ers. James Hardie HardieBacker 1/4 in. And if you use a thinset approved for that substrate, there are no … Make sure that you apply a waterproof sealant over the top of the Hardibacker while installing to make it truly waterproof and to ensure a proper measure of sanitation. Wood-based panels, like Oriented Strand Board (OSB), expand and contract with changes in moisture content. In an update in my home by the previous owner, they did exactly what you're suggesting. Originally, plywood was the go-to choice for roof decking. Once the RedGard® is dry, tile can be safely installed to the RedGard®-coated OSB with one of CuSTOM®'s polymer-modified thin-set or medium bed mortars. The hearth is BCI’s topped with 3/4″ OBS subfloor. With the new subfloor we are a little over 3/4" off the wall. Be careful if you sand. Although plywood is traditionally used to create the roof deck, it’s becoming more popular for contractors to use OSB. All of the thinset I have sen recommends NOT using it over OSB. A solvent based polyurethane over the OSB (3 coats will work nicely) should work. All this is further explained here.Similarly, can you plaster over OSB? Install sheets 1/4' above floor, tub or shower pan. DITRA allows for ceramic tile application over single-layer plywood or OSB subfloors on joists spaced up to 19.2" (488 mm) o.c. A better solution is to prepare and resurface the concrete slab so that it can accept thin-set adhesive or … Therefore, according to the 2012 TCNA Handbook, they are not recommended as a substrate material for direct bonding of ceramic or natural stone tile with cement mortars. the architect is a knob, hardibacker 12mm boards are for wet areas only like around shower/bath areas. In cases where OSB is to be used as an underlayment on interior floor installation, it must be properly treated before the installation of tile . The only downfall when comparing the two materials is cost. Now I am ready to put some floor tile over 3/4 T&G OSB. Insulating Concrete Floors. By Todd Fratzel on Basements, Foundations, Insulation. In the past when I applied Duraroc over plywood I used thinset mortar and screws. Which side of the Hardibacker backer board do I lay the tile? Rough or smooth side? I have Hardibacker. The next layer is 1/2″ Hardibacker. DITRA allows for ceramic tile application over single-layer plywood or OSB subfloors on joists spaced up to 19.2" (488 mm) o.c. The material is strong, durable, and tested over time. Joists’ spacing not to exceed a … Over that, I placed 3/4 particleboard.... yeah, I meant to buy plywood, but the store was out of stock and didn't realize this was a significant mistake. Can I use OSB instead of drywall? Appearance: OSB is not attractive enough to serve as a floor covering.Not only is the chip-board appearance unattractive, but the surface is also often marked with grid lines and manufacturer markings. How light can I … Durock is 1/2" or 5/16" thick and can be applied over 5/8" exterior grade plywood or 3/4" oriented strand board (osb) using a latex modified thinset. Plywood manufactured with a fully waterproof adhesive, and with an Ditra over Hardibacker Discussion in 'Ceramic and Stone Q&A' started by Powell014, Aug 10, 2020. The Hardie specs say "For all floors: Use minimum 5/8" exterior grade plywood or 23/32" exterior grade OSB, complying with local building codes and ANSI A108.11. Ditra is waterproof, while cement board lets water through but won't be damaged by it. Within 6 months, the wall area behind the plastic closest to the shower became densely packed with mold. The final surface is ceramic tile. Fix holes with putty, prime osb and use leveler only where needed, which would be by cabs. There is a rough side and a smooth side. roofing felt) between studs and HARDIBACKER ® sheets. hardibacker over plank subfloor December 13, 2020 December 13, 2020 . Placing 1/2″ (or 5/8″) drywall over 1/2″ OSB.