He did the same where the floor tiles meet the wall tiles. He just set the tiles directly on the OSB subfloor. I had to redo a floor from the knucklehead that had the house before me. Removing the thinset provides a clean, smooth surface to work with when installing new tile. For good new rock music, click on: http://www.wolfmother.com. A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. Span of beams under the wood planks is 10 ft and spacing is about 18 inches. Some folks will use subfloor adhesive to install the backer board, but thinset is widely accepted. There are two materials commonly used for laying ceramic on plywood or OSB that are applied before the tile: Although it is possible to remove thinset from drywall, significant damage to the drywall's surface occurs during removal. 559 266 4000 | info@ajtruckschool.com . The tile job in my bathroom was a complete failure. The thinset was laid down but the porcelin tiles did not stick. On top of the plywood they put down cement board. DO NOT install tile directly over OSB (that's what the thinset manufacturers are referring to). Is there a product you would recommend? a buddy said J Bridges is now saying he uses modified on top and underneath too. I want to add that the guys that did the job effed up a lot of things in my house. But, you cannot bond tile to osb because the resins used to make osb will not allow the thinset to remain bonded for very long. Hey every group has to have one. of water. Instead, he put all the thinset on the backer board that we just recently put down ourselves with screws (and taped and mortared the seams). I should make that my tagline. Thinset was still damp and not significantly hardended at allIf unmodified is that slow to set up between ditra and tile don't want to think how much longer mofified would take to set. I've used both modified and un ... haven't noticed any difference. Also, cover the things around the flooring with plastic so that the dust does not settle on them. I didnt do the job. What about if you prime/seal the osb first. We are very concerned about any moisture at all getting into the OSB. Was the thinset not mixed properly or applied according to directions? Three years after the job was done the tiles have started to crack. It's ok to put a layer of thinset between the OSB and backer board. Spread it onto the ink stamp and then wait about 10 minutes. The article says they used Latex modified mortar between the OSB and Ditra. There are oscillating tools such as the Multimaster which can use a rasp like tool to remove the thinset but this would be a very slow and arduous task depending upon the size of your bathroom. The OSB was both glued and nailed into the sheathing so just getting the big chunks of OSB off was a chore. That grout is cracked up too. This thinset removal device generally removes thinset with ease and is way better than the slow, clumsy, and inefficient traditional methods of removing thinset. 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. We called our builder, John, who is overseeing this entire kitchen renovation production and he said he’d send a guy over. OSB will stay swollen while plywood will shrink back to its original thickness, because the compaction force is lessened. I have a feeling that the problem is with the way that the tiles were set as opposed to a structural problem. Plywood panels are thin veneers of wood glued together to form the desired panel thickness. And readers were so encouraging about the progress and how fast it was going. When removing old vinyl sheeting, stubborn glue remnants can remain adhered to the subfloor. You can grind it off or chisel it off. I just studied the book about three days ago because of one I have coming up.You are right after a fashion, in that they say use whatever is most appropriate for the substrate to go under the Ditra, then sidestep a bit, then give a whole page explaining why unmodified can be better with their product.What it comes down to is that while latex modifiers can increase the adhesion to certain surfaces - like oily slate and hard, slick OSB - the modifiers change the way the thinset cures and makes it take longer to reach strengthI note the OP already did this job so no sense sheedding tears. They recommend the 3/16 V-notch but my tech says you can also use a bigger notch if you have a rough surface. I am now in the process of trying to fix it myself. Oct 16, 2008 #5 Thks for replies. baking soda and 1 tsp. Just did one today. But looking at the way that th tiles just popped off made me think that the thinset/mastic that they used did not hold. But you have to ask why was the tile job such a disaster? Tiles moved.Went to try and pry out now unlevel tiles and 'voila', they just lifted right out. So can the grout. My son attempted to put down porclien tle but did not prep the floor well enough.There was mastic on the floor. A grinder might also work but the dust will be miserable. Yes, if the floor has some give, the tiles may very well fail. Have you looked over the Ditra website? Thinset on wood subfloor flooring contractor talk floor no more and how to mostly remove thinset from wood how do we remove thinset hearth forums home how to remove mortar from subfloor 1 lay a soaking wet towel on floor no more and how to mostly remove thinset from wood. It's best as a 2 person job with one person busting and one removing ideally. Excellence is its own reward! I consider the thickness of the subfloor, the condition of the subfloor, the material it is composed of, the size of the joists, the spacing of the joists and then come up with a conclusion based upon all of the above. "I am the master of my fate, I am the captain of my soul." I’m sure the chipping hammer is great for other applications, but for removing thinset it was a big fat FAIL. Thinset over OSB? Long story short, a crew came over to remove the thinset and brought with them a… chipping hammer. We went from this: To this: In case you missed it, I posted every day that week to update on the progress: here, here, here, here, and here. Get an overview of the process of creating a traditional-style fireplace that burns well and meets current building codes from experienced mason Mike Mehaffey. Reply. Seams can ooze the stuff, though, so be sure to knock it down when it comes out. weekendbuilder | Posted in General Discussion on April 25, 2007 11:32am We are trying to lay slate tile in an entryway. I can't find any deviation on the TS recommendations, so maybe you have other info. A. Alberta Stone. Even if you could remove the dried thinset without disturbing the cement boards, would you be setting yourself up for another tile reinstall in three years? "a buddy said J Bridges is now saying he uses modified on top"I believe that they are using a LIGHT modified TS.But I don't remember the brand.. All that water ran down under the tiles and soaked into the OSB subfloor. Re: Removing thinset from OSB I just got back from a Schluter seminar so this is fresh. He uses Custom's Versabond under Kerdi without any problems. So wear dusk masks and eye protection goggles to protect yourself from the fine pieces of thinset. On top of this they put down 3/4 plywood. Things You Will Need Small … We chipped up about 400 sf of tile today and need to remove the thinset …. There is also some sort of adhesive/mortar bonding the cement board to the wooden subfloor. For a better experience, please enable JavaScript in your browser before proceeding. Used unmodified as called for between ditra and tile. Now all of the thinset is stuck to the backer board. Mix a paste of 2 tsp. But then again, I am not a contractor. We just read the article in Fine Homebuilding No. from what I first gathered ... the problem was with grout cracking. Thanks. Attending in Sweatpants: The Virtual 2021 International Builders' Show, Installing Low-Voltage Monorail Track Lighting, Plus, get an extra 20% off with code GIFT20, Simple Way to Make Old Walls Straight and Plumb, Expert insights on techniques and principles. The backer board should be screwed down according to the manufacturers specifications. Ditra allows modified thinset to lay the Ditra down, but requires unmodified TS when setting the tile on the Ditra. I also feel that 3/4 inch plywood does not provide the rigidity that tiles require. Using a hammer, and a chisel if necessary, repeatedly strike the thinset in an effort to loosen its bond with the subfloor. They are OK as long as they aren't rolling a piano over it this month. I started to pull up more tiles and realized that they all have the same problem. VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. Vacuum up the dust with a CT. Then use the RAS to grind off the residual. The point is to bond it to the OSB. )The bathtub* was d… I would probably just remove the cement board. Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. The laundry room originally had linoleum over 3/8" OSB over 1/2" plywood sheathing. Get the thinset pretty wet, running out of the bucket but still holding ridges, and press the Ditra into it. Anyone have any experience with this? I had to redo a floor from the knucklehead that had the house before me. There is a beam that makes a squeaky sound when the winter comes around. Stay tuned for upcoming podcasts, product features, and more. About 6 months after the remodeling job I had water leaking under the tub because all of the grout cracked from settling. Typically 8" along the edges and 12" in … The uneven texture caused by the glue remnants makes laying new tile nearly impossible. So when i removed the tiles, the thinset came up with the tile and didnt stick to the wet floor. Good Luck! I'll be sure to let everyone know if/when I find out the hard way! This is a first for me, especially with 24″ tiles (I did have them delivered to the store and picked them up myself which I think helped a lot…I’m pretty sure it’s the shipping that usually does them in. The building inspector did not like the way one of the beams looked and had them bolt two new beams to the bent one. Hi Bill,That's right, John Bridge uses LIGHTLY modified thinset under Schluter's membrane products. We just read the article in Fine Homebuilding No. They have a lot of detailed information there about various substrates, for example: A pre-show primer on the first-ever online IBS trade show. Possibly. Make the cut 1/8 inch less than the thickness of the OSB subflooring to prevent cutting the attic floor joist or truss bottom cord as this will damage the wood framing. And also, the reason the tiles broke loose so easily is because the shower door seal leaked and we didnt realize it for about a week. They also have a proprietary 1/2" wonderboard over 3/4" t-g exterior plywood subfloor where joists are 24" oc. I use my Bosch rotary hammer drill in the hammer mode with a spade bit to remove as much the tile and thinset as possible. The tiles came up easy but left alot of thinset on the hardibacker. Thinset has been used to bond the tile to the cement backer board, and the backer board has been screwed to the wooden subfloor. In order for the new tiles to stay adhered, the subfloor surface must be … Remove smaller patches of thinset using a chisel. When you remove old floor tile, you will sometimes get small pieces of the thinset mortar to pull up along with the tile. Start your subscription today and save up to 52%. Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. A-holes. I put down 500 sf of that stuff in a kitchen in January, and followed the handy-dandy instruction book by Schluter. What they allow and what they recommend are two different things. Removing tile and thinset can seem like a daunting task. And I have been elected to be the one. I used a 4" angle grinder with the most agressive sanding disks I could find I think it was 36 grit, get a couple disks The grout seemed to be a little tougher than the thinset to grind. Ask Question Asked 1 year, 4 months ago. That will eliminate/slow down the loss of moisture from the mortar. If you need follow up info, there are some very knowledgeable pros at DIY Chatroom who can answer any of your questions. I can confidently say that I expect to be a life-long subscriber." As you know, a lot changed in our kitchen last week when we took down the wall dividing the sunroom and kitchen. Use a damp rag to remove the paste, scrubbing the stamp as you do so. Doesn't matter, though. Can someone help? Invictus, by Henley. There are ways to determine if the floor is solid enough by measuring deflection. . Was the subfloor unsound? I do have a big ditra job coming up ... so I gotta go read what J Bridges said ... even if unmodified is recommended on top ... for hard to stick tiles I'll still go with modified ... for fairly basic ceramic ... stuff that'll stick just fine with unmodified ... if that's what they want that's what I'll give them. The floor looked pretty good and structurally sound. Now I'm left with removing the glued on remnants of OSB off of the sheathing layer and this is where I'm pulling my hair out. So, take your time and make sure to remove mortars from each and every tile. Removing Thinset from Plywood. Also, it appears that the floor originally had a "mud" job before it was demolished to put down 3/4 inch ply. I am not high tech. Peter I get it, I felt the same way the first time I did this myself. But Amazing hack using simple tools to quickly and easily remove the mortar left behind from the tile. If you leave mortars in a tile, removing that can become quite a difficult task. If they used mastic ( I think you originally mentioned thinset) and the floor got wet (think minor flood) the mastic will give way since it is not truly waterproof. Plywood and OSB frequently have imperfect joints and surface textures. Invictus, by Henley. We are trying to lay slate tile in an entryway. Clean up the tile and dispose. Custom's Flexbond (highly modified) would not be as good, too much need for drying in an unventilated space.Bill. Don't use it. Use the flat end of a 2-pound (0.91 kg) hand maul to hit the end firmly. So if the floor has some give it will cause the tiles to pop off? As far as bonding goes, no sweat. "I am the master of my fate, I am the captain of my soul." If removing a piece of the OSB subflooring is the only option, use a circular saw to make a cut down the long edge of the T&G between the sheets of subflooring. As you loosen the thinset, use a metal scraper to remove it from the floor. I actually started out the week feeling pretty good…I had ordered most of the major bathroom pieces, and they were all shipping very quickly.The floor tiles* arrived and none of them were broken! How to to do it? Call us Today ! Carl Anders on August 16, 2020 at 10:40 am This is in contrast to 'medium-bed' (up to 1/2 I would just prime with a latrex bonding agent, let it dry 'till tacky and go for it. I had to redo that and using caulk. I'm of the opinion now that I'll use what's best for the stick with the subfloor. Are you sure the support framing and subfloor are up to the job? Login; Sign Up; Username Password From your description, thinset was used and a bad joist was sistered to provide a fix to a faulty joist. Re: Removing thinset from OSB Shawn, check out a 7" grinder from United Surfaces Preparation which is part of Blastrac. Did the article get this detail grotesquely wrong? For example, the guy they had install the tile used regular grout where the tub meets the wall. Removing thinset from durarock backer board. I cant get the pics to load. Removing thinset by using a hammer and chisel is the easiest way to get rid of it, but it is a dusty task. Tiles were 12x12.Let's not confuse the issue with facts! 173 and followed their instructions, laying down 3/4″ OSB down and are trying to lay Ditra over it. I'm not a big fan of Hardibacker or the other fiber cement boards for a number of reasons, but it seems … BTW, I used a J-roller to spead/even out the ts under the Ditra, it was able to move the stuff a lot easier than what they recommended. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! "I have learned so much thanks to the searchable articles on the FHB website. Reply. The cement-based adhesive sometimes remains on surfaces after tile removal. Helping You to Do It Yourself! Scrape thinset off the floor or wall after removing the backer board with a metal scraper, or use a handheld oscillating power tool with a mortar grinding attachment. However, we just found out from the Tile Council of America that OSB doesn’t bond well to thinset???? OSB panels are manufactured under the provisions of APA PRP-108 or PS 2-92 and are comprised of soft, thin wood strands or chips, which are held together with waterproof adhesives. While these could be smoothed over with thinset, they are much harder to manage than the correct solution. I pulled up a piece and realized that it was not attached to the thinset. That’s why you think that all the tiles don’t have this kind of thinset. At the very least another layer of 1/2 inch exterior grade plywood should have been added to the 3/4 inch plywood. "Did the article get this detail grotesquely wrong?". Removing thinset from back of porclien tile What is the best way to remove thinset from the back of tile. Used Ditra just recently. 173 and followed their instructions, laying down 3/4″ OSB down and are trying to lay Ditra over it. JavaScript is disabled. Most times, however, once the tile is up, you are left with small mounds of thinset all over your subfloor. Placing a sheet or towel on top of the tile while working keeps down the flying shards and dust. Proper Way to Lay Ceramic on Plywood or OSB. I'm not so sure any of this makes a difference? Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. Before you start tiling, I would find out the reason it failed the first time. removing the thinset that was underneath the ceramic tile that i showed you how to remove in another video. I have to agree with Ron. ... and since the plastic did absorb any moisture .... it did cure as quick ... and the "excess" moisture could screw up the grout. the modified cured differently ... (or was it the unmodified?) You should notice the thinset patches breaking apart after about 20 to 30 seconds of hammering. G. genoveg. If the stain has lightened, continue to apply the paste mixture and rub it away until the stain is gone. I hired a contractor to do it. Hence, OSB is rarely used for an underlayment tiler.. - M.K. It is very important that you determine what went wrong so you can do the job properly. © 2021 The Taunton Press, Inc. All rights reserved. But it doesn’t have to be. J. Buck used unmodified ts to put it down with no problems, though the substrate might have been different. He just set the tiles directly on the OSB subfloor It was cracking the tiles on every seam. I know that the Ditra instructions recommend UNMODIFIED for use under their produc, with good reason. Oct 15, 2008 #4 That's right. PVA white glue, Acryl 60, weldwood,... the list goes on and one.Any tile supplier will have something. The 24" oc joist with 1/2" wonderboard is the only one requiring plywood as opposed to osb. Thinset is an adhesive used to set ceramic tile and stone. Place a 1 inch (2.5 cm) putty knife at a 45-degree angle to the remaining thinset patches. Be sure to add a quality thinset removal bit such as those made of hardened metals (look at this example) because they resist impact stresses brilliantly. It is difficult to diagnose a condition like this w/o knowing what was done. The bottom of the tiles look like I just took them out of the box. All I know is that the floor originally was made of cement. During the demo they broke up the cement. Take care not to hit the floor too hard, as damage to the subfloor could occur. I have a 7" Metabo with dust shroud for vaccum , I run a aggressive Blue max wheel on it, I can usually grind 90 to … For those of you that follow me, you know that I’ve been working on my laundry room renovation. Old thinset mortar should be removed from a floor before installing new tile. Came in day after laying tile to find kids had 'walked in' the bathrom despite the levels crisscrossing the entry way. However, rough or porous or how to clean thinset of tub tile can create a bit of a problem here.
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