Without seeing the rh% of moisture in the sub-floor it's impossible to give 100% correct information, but as long as the rh% is under 97% you could prime the floor, use a latex based screed to give a smooth surface, use a surface DPM (as far as i'm aware only Ardex DPM 1 C is guaranteed over a sub-floor without a working mechanical dpm) then finally. Where it differs from other smoothing products is that there is a latex additive. Clean existing tile by scrubbing and washing with stiff bristle brush and detergent. None of those apply to wall tiles, and the reduced weight of a thinner tile makes for easier installation. We have been advised to sort the floor out and latex screed was mentioned. Self-leveling Properties: Ceramic tiles may have minor level. 2. Overlap sheets by at least 20 cm (7. Pry the tile section using the chisel to remove the tile altogether and proceed to the next till the job is done. Removing the laitance by sanding to provide a key for the primer and/or adhesive. Before applying a floor covering, Setcrete Latex should be left uncovered for 24 hours when applied at 2-5mm thickness. 322. The mixed adhesive shall be applied over the protection screed to a thickness of 3mm up to 1 sqm at a time. The correct way to this job would be to lift all the floor tiles, lay marine plyboard down and secure it with screws. 1 Sand-cement screeds should generally incorporate a latex additive (such as Planicrete) and should be installed as per the guidelines in Appendix A of AS 3958. Apply the mixture to the floor, and use a floor brush to scrub the floors. However, there are a few factors to consider before embarking on this type of project. Easy to use by mixing with water according to the manufacturer's instructions to get. 0. Maximum depths are around 10-15mm, however with the addition of bulking aggregates (normally kiln dried sand) some latex floor screed can go up to 30mm. Step 2 – Sand Dried Mortar. Thirdly, paint again with the liquid DPM and let that dry. Pumped anhydrite floor screeds are not much dearer than ready-mix sand/cement, costing around £25/m3 (laid. Answered 17th Jan 2012. Lay it at an angle of about 45 degrees and force it down using a sledgehammer or mallet to raise the tile edge and break the bond from the floor. Installation of Ceramic Tile in Swimming Pools,. 2-m straightedge laid in contact with the screed. screed to go off before laying the tiles, so I am guessing I should also wait the same time-frame before putting down the S. Floor covering is a term to generically describe any finish material applied over a floor structure to provide a walking surface. 2. you risk voiding the warranty of the flooring by not installing on a dust free, flat smooth surface. Ceramic tiles can be laid over virtually any level, firm, rigid surface that is clean, dry and structurally able to support the weight of the tiles; e. Kerlite tilling, for example, is very hard to cut. 6. I am hoping to cover it all with a vinyl sheet. Download Article. However, the Quikrete High-Performance. 3. Yes you can latex over ceramic tiles as long as the tiles have been installed to a good standard and you have no damp plus you have to use floor primer. This has to be absolutely smooth for it to work, though. Measure each side of the tile under test at positions 5 mmfromthe comers. Sandwiching will give you a nice flat surface and also eradicate any water vapour coming up through the screed and ruining your flooring. Ceramic tile is a building material made from clay that has been molded into tiles and. Uplift existing tiles and latex screed subfloor, like another fitter said use Arditex NA that way there is no need to prime. #6. Next, clean the tiled floor: Vacuum or sweep them to remove the filth. Ive also had 70 m2 latex crack over vinyl tiles. Tip the mixture into the area you are screeding, and level out to. 1 to set ceramic and stone tile, including large format tiles, over the KERDI membrane. I've just laid a latex screed over electric matt underfloor heating (about 8-10 mm). Gypsum based screeds: According to the applicable standards, the residual moisture of gypsum based screeds should not exceed 0. Alternatively, you can also grind down the uneven concrete flooring by using other tools or sandpaper. Self-Levelling Floor Screeds Compound. Floating engineered wood is ok. Existing Ceramic, Porcelain and Natural Stone Tiles * Flooring Grade Asphalt & Bitumen* Anhydrite Screeds. 2. There is no additional water, just pour the. USES Davco 168 is designed for installation of dimensional stone and ceramic tiles over a wide variety of sub-strates. However, unevenness over 0. Its on your back if you risk 30 quid of screed over a few hundred of tiles!Firstly, paint the quarry tiles with a liquid damp proof course, let it dry. The short answer is yes, you can screed over ceramic tiles. 1 – Step 1: Prepare the surface. My kitchen floor is part bare concrete and part quarry tile with cork tiles stuck on top. Search the floor for any loose or damaged tiles. Can be pumped for fast application. Self levelling compound sold in 20kgs bags can be used to raise up to 50mm. Latermix Cem Mini can also be used as. Existing Vinyl Tiles * Steel/Metal Surfaces. When laying vinyl, ceramic tiles, carpet and other floor coverings. 2. Rich. Floor leveler is usually latex-based cement. They made it an entirely new house! As is super common here in south Texas, the house had large ceramic tile flooring installed throughout. 3. Without proper preparation and priming, you risk your tiles peeling up later due to poor conditions. Can be used with underfloor heating systems. 9. 322. kitchen floor on concrete with ceramic tiles to be fitted on top. 2. AS 3740-2021 – Waterproofing of domestic wet areas 3. 2. 2 states: Where a tile bed or screed is used, the waterproof membrane shall be installed above or below the tile bed or screed. Use before application of polymer-modified mortars over properly prepared sound, stable and nonabsorbent substrates including ceramic tile, natural-stone floors, glass tile, cement terrazzo, cement-based. Thicker substrates require 2 days per mm. GB Carpets. ARDITEX NA can be applied on all common subfloors such as concreteStep 4: Mix Mortar. Pouring self leveling concrete over linoleum tile with a DIY concrete dispenser made from a trashcan. Step 6. Floor tiles need to be thick to withstand years of foot traffic, the weight of furniture, and the sharp shock of dropped objects. Resilient floorcoverings can be installed after just 4 hours and ceramic tiles in as little as 3 hours. Image caption- S 15 C polymer adhesive used for slurry consistency. VAT. Screeding over cracked tiles can cause pressure over time on the screed and begin to break it up in the affected areas underneath. ABSTRACT The use of polymer/latex type additives that improve the performance of thin-set adhesives and mortars has been in common and increasing use since the 1960's. USE To level uneven internal subfloors to provide a smooth surface. As it might sound, a bonded screed is applied directly to the. (19 mm) Thickness) Typical Mix Ratio: 5. Lay it over your floor and lift the low end until the bubble is central. BUY NOW: US$33. commences. In wet areas, Nitotile GP from m/s Fosroc shall be used as ceramic tile adhesive. Reply to Kitchen Floor tiling on Latex Self Levelling Compound in the. Step 3 – Remove Debris. Self-leveling underlayment is a great choice under any tiled floor, but it’s the absolute best choice when installing tile over an in-floor heating system. Remove and Smooth. Latex floor screed thickness varies from product to product, however as a general guideline please find the depths below: Minimum depths are usually 2-3mm, however there are some products that can go down to “featheredge”. The floor needs to be. Use a 2×4 to screed the floor and completely. • When mixed with water, suitable for ceramic tile, quarry, pavers and saltillo tile over cementitious surfaces. Many screeding products, like Instarmac’s UltraFloor Screed-IT, set rapidly. maul. LVTs like Karndean Amtico Moduleo etc yes. With the hole closed up, you can start “folding” the mix. ball & young p131 general purpose neoprene (diluted) floor primer, to prime the tiles. g. With the existing tiles removed you're removing the risk of the screed failing. DECORATIVE CONCRETE OVERLAY OVER EXISTING CERAMIC TILEOver-Eze stampable concrete overlay and resurfacer has proven itself on many residential and commercial. 3. Whisk the mixture of powder and water to a lump free consistency and then apply to your surface using a steel trowel, followed by a spiked roller. My kitchen floor is part bare concrete and part quarry tile with cork tiles stuck on top. Maximum gap measured with a slip gauge. 6 Step 6: Do as Planned: 6. N. The contractor applied a layer of traditional cement-sand screed to a depth of 65mm and told me to wait 110 days for the screed to dry before calling the tiler. They only recommend pouring concrete over existing tiles if they are in sound condition and firmly affixed. Strike the face of stubborn tiles to break them up for easier removal. It can be difficult to determine how much flooring you will need, but at Tile Wizards, we have a method that never fails. First off, self-levelling compound is a latex based cementitious product that provides a thin, smooth overlay when applied over rough concrete slabs or uneven floors. When painting a tile floor, the following three types of paint work best:. DIYDave. i try to keep up on new products and a company called ardex uk make a latex based levelling compound called (arditex na)that goes straight over bitumen to seal it. SikaCeram® StarGrout Epoxy based grout for joints from 1 to 15 mm width. • When mixed with water, suitable for ceramic tile, quarry, pavers and saltillo tile over cementitious surfaces. Pro Flow can be applied from depths of 2 – 12mm in one application. Last edited: May 23, 2012. In most circumstances, porcelain and ceramic tiles just need regular cleaning. Use painter’s tape in combination with a drop cloth or plastic sheeting to protect nearby surfaces from errant paint. They come in thicknesses ranging from 2 millimeters (about 1/16 inch) to 8. The floor leveler will fill in previous grout lines and make the floor level for the tile over tile application. 2 Step 2: Fill the holes with compound filler. Note: If you do stick a cork tile in the wrong spot, use a firm-blade, 3-in. Available styles include: All these products are water-resistant and help to seal the surface against moisture. SR1 3mm. Wickes sell 'Setcrete Floor Leveling Primer' , which seal porous, dusty surfaces prior to pouring the levelling compound. Remove any loosened grout with a chisel and hammer. For instance, if there is a lump on the wooden floor, you can use this option. 3. The purpose of a screed is to give a smooth and level floor surface on which to lay your chosen floor finish that could be vinyl, tiles, natural stone, carpet, parquet, wood and so on. Poor Workmanship. Most in screed UFH is water based and pumped so theres a very good changes its over screed. Answered 6th Apr 2014 Like 1. Over plastic, semi-dry consistency traditional mortar beds (min 20mm thick) before beating in pavers and ceramic or stone tile in cold climate conditions. Be careful of latex compounds that say they can go over ceramics with no primer. Use a 3/4- or 1-in. Tiling floorboards with wood effect tiles offers a variety of benefits over natural wood, including being more durable, and easier to maintain and keep clean. Once traffic starts walking over it, those stresses start moving the tiles and eventually they pop off the floor and get. Using the notched side of the trowel, comb the mortar to produce an even surface. 5%. These are available from most tile warehouses, builders merchants and screwfix New Vinyl Plank Flooring (Over Tile!) Now that I FINALLY have some decent current pics of the house since we moved in, I can share all about the luxury vinyl plank flooring we had put in right after we closed. 2. In place of a screed, you can make use of a paint roller or finishing trowel. 4-6mm would be fine. • For use with porcelain tile and over a wide range of floor surfaces when mixed with Polymer Additive (#13956) instead of water. I'm new to this and didn't select reply before. I'm looking to lay Karndean tiles on top of these tiles (not going to take them up or deal with the bitumen) and would like some advice on how to prep the old tiles. Last edited: Sep 2, 2010. 2%, and it is white asbestos which is the least dangerous type. I asked a contractor who happened to be in my company and he say the same thing too. 5 cm) thick for leveling and ramping. When the sheets are secure, spread thinset mortar on the seams, cover it with fiberglass cementboard joint tape and trowel another layer of thinset on top of the tape as if you were taping drywall seams. Submit your price for the work in a written change order and get signed and dated approval. It also provides guidance on the waiting period required for new concrete. USE To level uneven internal subfloors to provide a smooth surface. N. Country. 9") onto all walls and pillars. Screeds are typically bonded onto most. Use a 3/4- or 1-in. Remember these tips prior to starting work. Step 6. Screeding a floor is the simple act of applying a well blended mixture of Ordinary Portland Cement with graded agregates and water to a floor base, in order to form a sturdy sub-floor that is capable of taking on the final floor finish or act as a final wearing surface. Where the old screed has been removed by the outside back door, it has uncovered a low inner brick course running parallel to the door in line with the inner wall with a gulley either side, similar in dimensions to the one described above. must be filled. Nonetheless, as simple as this process might sound, there is a lot more to. hope this helps . ceramics I don’t know. III. Thoroughly sweep and vacuum the entire floor. 8 Step 8: Grouting: 6. “A common cause of problems in rigid tiled flooring is cracking, associated with underfloor heating. Bonding Agent for Use with Sand/Cement Screeds and Renders. over almost all subfloors without priming, including ceramic tiles, bitumen and flooring grade plywood. . Fold the sheets up 10 cm (3. 30758. then use, f. Just to be sure you've seen my previous messages: I think the house was built in the 70s but may have been 60s; the tiles have been tested; we haven't had a professional look at the floor with the carpet etc removed but have had advice on "if the tiles are generally in. However, I contacted a specialist anyway, and we are looking at £400 + VAT to remove the tiles. ceramics I don’t know. Concrete has a much coarser mixture than screed, consisting of larger, hard-core aggregates, which are the key element that gives it its durability and makes it strong and long lasting. Unconvinced that repairs were necessary, the tiler installed large format tiles over the cracked screed directly. Reply to londonchap81. In that case, first of all, you need to take out the old vinyl tile and then apply self-leveling concrete. Over time, an increase in stress build-up will make the tiles more likely to pop. 2 Using a backer board or new drywall for uneven walls: 6 Pros and Cons of Tiling Over Existing Tile. uk. A proper floor fitting will screed over tiles and lay karndean but I have no idea whether it would render underfloor heating useless. ceramic tiles, porcelain tiles, flooring grade asphalt, quarry tiles (sealed) and vinyl. Mapei prim grip is the grey primer. The cured screed will have a layer of anhydrite screed laitance that will need to be removed after 2-6 days (dependent on brand of screed used). Where a 12×12 (30cm x 30cm) used to be big now it’s quite common to deal with wood-look tile that is 48 inches long (120cm) and installed in a random offset pattern. The purpose of a screed is to give a smooth and level floor surface on which to lay your chosen floor finish that could be vinyl, tiles, natural stone, carpet, parquet, wood and so on. FAMILY HANDYMAN. Total Time: 2 wks, 1 day - 2 wks, 2 days. Using the diagram below, we would dry-lay tiles 1,7,8 etc and space the row out so that tiles 12 and 39 were roughly the same size. 3 Step 3: Stacking Tiles: 6. Reply to londonchap81. Walls: 4 mm in 2 m. installed after 4 hours and ceramic tiles can be applied after 3 hours. 1. If the tiles are in good condition, with no cracks or chips, then screeding over them should be possible. Step 4: Mix Mortar. flooring bloke New Member. Screeding over cracked tiles can cause pressure over time on the screed and begin to break it up in the affected areas underneath. That will stop any raising damp to your vinyl. Discard any material that has exceeded the pot life or working time of the product. We get loads of sub floored Ashphalted as it’s great for a Dpm and building the levels up from parquet wood being taken up. 24 Oct 2014. It can be confusing because many leveling compounds are marked as useable on a variety of surfaces, including linoleum and vinyl. you cant put the dpm directly on to the. As long as your floor is level (as in 'water level' as opposed to 'flat/smooth) then any minor bumps or pockets are trivial, and will be taken up by the level of adhesive. NOTE: Arditex NA should not be used on top of vinyl. e. The dimension between the floor and threshold of the door is circa 20mm, so cant lay a very thick level of screed either, taking into account the eventual permanent flooring that will go on top. 7 Step 7: Leave for 24 Hours: 6. It pours wet and then dries to create a solid flat surface that is highly durable. Use to level and smooth interior concrete, terrazzo, ceramic and quarry tile, epoxy coating systems and non-water-soluble adhesive residue on concrete. Tiles greater than 400 x 400 mm should be back-buttered. Only really suitable for. It is probably a low content, eg. The increased use of other dense layers over the screed, such as uncoupling, or crack-isolation membranes made of bitumen or plastics such as. There are three main types of screed – bonded, unbonded and floating. 12. Now time to ask the ID who say no need screeding why they say so. A latex screed is a mix of powder, and liquid latex poured over a concrete slab to provide a flat, level surface. commences. June 28, 2022. If flooring is applied directly over the ‘young screed’ there is a risk of development of moisture related de-bonding of the adhesive and blisters in the vinyl or coating. Heating mats, loose. You can achieve tilling over a slate can with an experienced tiller. 246: 10 mm thick porcelain floor tiles + adhesive: 0. 3. Issues to be taken into account include: installation. Modified sand and cement screed can start at 10mm, that is for a rapid strength and fast-drying product. 1. Or 1/16 th of an inch in any 24-inch substrate. stoneyboy. AS 3958. Maximum depths are around 10-15mm, however with the addition of bulking aggregates. AS 3740-2010 3. USES Davco 168 is designed for installation of dimensional stone and ceramic tiles over a wide variety of sub-strates. Color: Gray. 2mm to 3mm latex screed must be installed before any sheet or tile floor covering is installed. 2. Self-levelling screeds are applied in a liquid form which smoothes itself out over a given area. The latex also allows the floor a certain amount of flex over time so this helps to prevent cracking and shrinkage. . Moisture testing to confirm the dryness of the screed before tiling commenced. This prolonged drying also means that the job can be delayed for significantStep 1: Divide the floor into sections. masonry chisel and a 2-lb. You need to adurapid crack, then primer and latex then. All depends how big is your kitchen. A levelled surface is especially important using large format tiles. Most in screed UFH is water based and pumped so theres a very good changes its over screed. Bonded. g. USE To level uneven internal subfloors to provide a smooth surface. When laying vinyl, ceramic tiles, carpet and other floor coverings. Estimated Cost: $75 to $100. maul. Latermix Cem Classic and Maxi are no fine screeds based on expanded clay LWA and are quick drying even in high depth. 30 Jan 2008. A38 is an engineered screed system based on a specialised cement powder and separate sand-aggregate mix. Remove loose tiles and leave the space open for filling with the compound. oogzy Member. 1. Start at a broken tile or between tiles where the grout has loosened. the concrete or sand/cement screed should be confirmed dry by. Suitable for fixing porcelain tiles and natural stone in interior locations to solid stable substrates such as concrete or sand: cement screed in small to medium sized installations. laying lino/tiles over existing kitchen floor. Cement screed flooring is inexpensive. With an average labour cost of £11 per square metre, we arrive at a screed floor cost of £26. 2 litres of water with a slow speed drill. I've had three lots of advice, to rip up the existing tiles and start from scratch, to screed over the tiles and lay the vinyl, or to ply over the tiles and lay the vinyl. SR2 5mmMAPEI. Rapid, High Flow Self-Leveling Underlayment. Installation of Ceramic Tile . If the plyboard has been pulled down in some area because of the screws when securing it a levelling compound might. Use your steel trowel and work the compound in sections, following up with a spiked roller to make sure there aren’t any air bubbles. Step 5 – Measure & Draw a Diagram. Only really suitable for domestic loose lay vinyl. The mortar has an open time (work-able time) of about 1 hour. A self levelling compound is your answer, cost about £12-£18 pounds for 25kg bags, float over the surface using a flat trowel in an even motion much like spreading tile addy. I gather you are planning on putting down a floating wood floor i. However, with unsatisfactory fixing practices or in certain climatic conditions, moisture expansion in excess of 0. That will stop any raising damp to your vinyl. Flowable liquid floor screed suitable for applying up to a depth of 5-50mm onto: Floors with underfloor heating or under tile warming; Cement; Concrete slabs; Pre-cast elements; Wooden flooring; Existing ceramic tiles; Existing rigid plastic tiles; Floating floors (e. The thinset that was applied to glue down the tiles, has been applied over a dirty surface and instead of adhering to the substrate, it adhered to the dust and oils sitting on top of it. 6. PT Flooring Specialists. Help! 29/12/12 - Thanks for your replies. Any difference in levels at the doorway can be. Only if you dont like HDB tiles and want to use your own tiles then no need for screeding. We get loads of sub floored Ashphalted as it’s great for a Dpm and building the levels up from parquet wood being taken up. I'm wondering if anyone can help me please? I've just bought a 70's house which has thermoplastic (Marley) tiles laid to the kitchen and utility. The slurry is usually just 1 mm – 2 mm thick. the concrete or sand/cement screed should. If you are installing where existing floors have been removed, check that there are no traces of previous adhesive residue. I would recommend F-Balls products. As it might sound, a bonded screed is applied directly to the. Discussion in 'Subfloor Preparation' started by SandyFloor, May 30, 2011. JC Flooring Professional Carpet Fitting Service. Applying a semi-dry cementitious type of screed. SR3 10mm. MAPEI recommends adding 5% to 10% in overage to ensure. 6. Contents [ hide] 1 Tiling over a waterproofing membrane, some helpful tips: 2 Decoupling mat floor tiling, some helpful tips: 2. DON’T stretch the peel-and-stick tile too much when installing. Latex screed over the top of the tiles using a latex levelling screed that is suitable for tiles that will stick to the tiles and not crack and lift. JC Flooring Professional Carpet Fitting Service. Fiona_cooks New Member. However, unevenness over 0. any good floor layer will be able to screed out a 5mm dip in your. Latex floor. Hi Pete, I have the answer. Tiling onto green screeds or concrete. I wouldnt lay them direct over the tiles but if they are sound and firm you could use a latex screed such as na to prep over the tiles and lay the alto on top of that. It is possible to waterproof and tile over existing tiles, provided the existing tiles are in good condition and firmly attached to the substrate. Arditex NA can also be used to encapsulate under-tile heating cables/mats onto concrete/screed/tile backing boards, prior to fixing ceramic floor tiles. Wet underfloor heating installation cost. Back-buttering is not necessary. ”Information Paper from IHS BRE Press provides practical guidance for architects and specifiers. Yes prime the latex then fix tiles using a flexible cement based adhesive . not a water based mix. DIYDave. Please help !!! I've had a 4mm-5mm latex screed laid using mapei renovation screed as I was advised this was the best option for a final floor finish as I was only left with about 7-8mm to work with as a microcement floor I had laid had gone wrong. . The tiles will also stick to a concrete floor providing it is covered with a latex screed/self levelling compound. almightymat. What's the best latex / screed to cover ceramic tiles. Prime with two coats, allowing the first one to dry fully before adding the second. Self-leveling Properties: Ceramic tiles may have minor. However 13 IS a Prime Number as it can only be. We have thought about having a. In most rooms, the tiles are still in place, in varying conditions. In this video I show how to self level a floor using s. Like 4. Take up old vinyl tile and latex screed over black bitchem . With the application of DITRA matting, tile coverings. 2-2012 – Waterproofing membranes for external above-ground use – Part 2: Design and installation B. For the installation of most types of ceramic tiles in interior and sheltered exterior locations. There are three main types of screed – bonded, unbonded and floating. The first thing to.