In Swimming Pools. 2. over almost all subfloors without priming, including ceramic tiles, bitumen and flooring grade plywood. Remember these tips prior to starting work. Calculator. On absorbent surfaces, such as cement and sand screeds, it may be necessary to damp down the surface with water before applying ARDITEX NA , to help reduce suction and pinholes. almightymat. Funnily enough Celotex do say you can float ply over their insulation boards and tile onto it, but they seem to assume that ply comes perfectly flat and don't have any recommendations as to how to get it all nice and rigid. 1. Planning - Calculate the number of tiles - Setting out - Laying the vinyl tiles - After care. Ardex Arditex NA is a smoothing compound and is one of the sub-floor preparation products. Working Time: 6 - 7 hrs. Water or latex based screed. 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. Arditex NA is a premium latex screed. There is no additional water, just pour the. 2-2012 – Waterproofing membranes for external above-ground use – Part 2: Design and installation B. 7 Fixing Cracks in the Concrete Floor Before Tiling, some helpful tips. Pro Flow can be applied from depths of 2 – 12mm in one application. 5 millimeters (about 3/8 inch) and. Selection and Installation of Ceramic. The reason that the additive is. SR3 10mm. Prime and smoothing compound then any LvT. Underneath the floor tiles was this black substance which I have since found out to. But applying self-leveling concrete over old vinyl tile is not a good choice. Start at a broken tile or between tiles where the grout has loosened. it is not recommended that you but self-leveling screeds over vinyl tiles, can cause yourself a bigger head-ace in the long run, and i know it can be a night-mare of a job but always better to take tiles up and start from scratch. There are many advantages in placing vinyl flooring over existing flooring, such as added insulation, desired thickness and with the use of transition strips you can avoid any unnecessary disasters with the installation. Yes prime the latex then fix tiles using a flexible cement based adhesive . On absorbent surfaces, such as cement and sand screeds, it may be necessary to damp down the surface with water before applying ARDITEX NA ® , to help reduce suction and pinholes. CAC FLOORING. 8 Repair Concrete Floor Before Tiling, some helpful tips. True feather edge allows for greater coverage. Most tiles these days are over 15 inches in size; therefore, they require a perfectly leveled substrate to settle in properly. Hooe this helps. s1oww said: The area i need to cover over the tiles is 6m x 2. Only really suitable for. All these products are water-resistant and help to seal the surface against moisture. Both screed and concrete are referred to as being green during the period from. SikaCeram®-260 StarFlex Deformable tile adhesive with lightweight fillers. 2-m straightedge laid in contact with the screed. 0222 / mm thick: 6 mm thick glazed tile + adhesive: 0. Rip the whole existing lino up before I put the kitchen units in, put the units directly on the quarry tiles, and then get the lino put in afterwards - I have no idea what the state of the quarry tiles is currently. Maximum tile size 300 x 300 mm. latex floor screed levels out uneven substrates leave a smooth surface to bond to. if floor is a concrete floor, then a latex mix would be safer due to the fact if there ever was a moisture issue then a latex mix would fair better than a water mix every. It varies by manufacturer but it pretty much seems to average 4. They also flog a ply-backed insulation board but don't divulge how they glue it on!The Bottom Line. 2. Systems,. 5. insulation board) Bitumen residue* * Best practice is to remove all bitumen. Remove cork tiles and then screed over concrete and remaining quarry tile/ cork. The next part of the process entails purchasing your vinyl flooring and adhesive product. Yes prime the latex then fix tiles using a flexible cement based adhesive . 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). If you use a paint sprayer, it is recommended to use a. Finally, allow the latex to sit and dry for up to 24 hours. If using porcelain tiles, ensure adhesive choice is suitable for. PRIMINGDescription. A proper floor fitting will screed over tiles and lay karndean but I have no idea whether it would render underfloor heating useless. They come in thicknesses ranging from 2 millimeters (about 1/16 inch) to 8. Those based in rural areas may pay more for floor screening costs due to the labour travel costs. AS 3740-2021 – Waterproofing of domestic wet areas 3. can i latex screed over. Hence they need to screed, because dont have ppl who put 30mm of cement before laying tiles. However, I have a number of questions. JC Flooring Professional Carpet Fitting Service. Because concrete has the potential to hit very high strengths, it is used across the construction industry for. One of the historical Mapei product lines with a complete range of versatile, reliable and innovative products for installing ceramic and stone material. 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. Check the entire slab for low spots by laying a straight 10-ft. Adding a little extra water to a thick mix can make it spread easier, might increase drying time slightly. Discussion in 'Subfloor Preparation' started by bournemouth, Oct 31, 2011. bournemouth Super Moderator. . All waxes or sealers must be removed, and patching/leveling or embossing must be brought to a flatness of 3/16” in 10’. AS 3958. By contrast, asphaltic cutback adhesive is an older type of mastic made with asphalt-based cement. 2. In 1986, a Field Report of the Ceramic Tile Institute of America (86-5-1) titled “Installing Ceramic Veneers with Latex Modified Mortar & Grouts” used the term “Latex Leaching. pnfl. 4 Use a screed to level the floor; a screed is usually a long and very straight board or level that will move the excess floor leveler to lower levels and will help you level the floor. 5 cm) thick for leveling and ramping. Can be pumped for fast application. Answer: This will depend on the type of tiles you are going over. Actual jobsite coverage may vary according to such factors as job conditions and application methods. Hiya I have a small bathroom which I tiled with "bargain" tiles from B&Q. Alternatively, you can use a flat shovel or a floor scraper. Wait a few minutes. 2. Issues to be taken into account include: installation. Country. The tiles will also stick to a concrete floor providing it is covered with a latex screed/self levelling compound. Too much extra will probably make it useless. 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. Screeding over ceramic tiles. • When mixed with water, suitable for ceramic tile, quarry, pavers and saltillo tile over cementitious surfaces. laying lino/tiles over existing kitchen floor. For internal and external use, including wet areas. Post reply. Laying ceramic tiles by Semi-Dry Mix Method. Apply only a thin coat to avoid dripping. The short answer is yes, self-levelling compound can be used over ceramic tiles, but there are a few important things to consider before starting your project. they will 99% of the time be a very poor strength compound. However 13 IS a Prime Number as it can only be. Then mix a lighter, creamy batch and wash over the floor. Total Time: 2 wks, 1 day - 2 wks, 2 days. 9 How to Screed a. Pumped anhydrite floor screeds are not much dearer than ready-mix sand/cement, costing around £25/m3 (laid. tanking. Submit your price for the work in a written change order and get signed and dated approval. Easy to use by mixing with water according to the manufacturer's instructions to get. Remove any broken pieces. VAT. 2. 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. Epoxy DPM * Existing Adhesive Residues. 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. The first step in any pool tiling installation is to evaluate the substrate and ensure it is flat enough to receive the tiles. Step 7 – Unroll Sheet Vinyl. The tiles have been removed in some rooms, leaving the bitumen, probably <1mm thick, and not sticky. Peter Newman Flooring. e. There are vinyls which let your floor breathe like Altro expresslay but as you have already got your vinyl then one way of doing it to be safe from raising moisture is -. 2×4 on edge; any areas where the gap between the slab and the 2×4 is wider than 1/8 in. Ready to tile now, use good quality tile adhesive and grout, powdered (bagged) materials are best. 5 litres per 20kg bag of screed. . However, unevenness over 0. The mixed adhesive shall be applied over the protection screed to a thickness of 3mm up to 1 sqm at a time. However, the Quikrete High-Performance. It is foot trafficable within three hours, and can be tiled after approximately four hours. 2-m straightedge laid in contact with the screed. Use painter’s tape in combination with a drop cloth or plastic sheeting to protect nearby surfaces from errant paint. However, there are a few factors to consider before embarking on this type of project. Liquid Screed. 1. Mix a small batch of thick screed and in-fill where the tiles are missing. USE To level uneven internal subfloors to provide a smooth surface. With the existing tiles removed you're removing the risk of the screed failing. 5-6. Use a paint roller. Can be used with underfloor heating systems. 1 Add a decoupling mat to the substrate. In this concrete floor video, industry expert Bob Harris shows the steps for installing a new concrete floor over an existing tile floor. we don't need a specialist. Lee Allen New Member. 5% prior to the installation of tiles. any good floor layer will be able to screed out a 5mm dip in your. 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”. end. Apply new adhesive to the spot, let it dry and try it again. The latex screed has cracked in multiple places and if I press hard with my foot, I'm not certain, but I think I see slight verticle. Over time, an increase in stress build-up will make the tiles more likely to pop. A “floating” screed is an unbonded screed applied over a layer of thermal insulating material, such as expanded polystyrene or polyurethane panels (Fig. 06% (0. Table 4. Floor Tile Gray Thinset Tile Mortar (50-lb) Model # 1011236. The floor leveler will fill in previous grout lines and make the floor level for the tile over tile application. Cleaning the debris: Soak a cloth in clear water and wipe any dust or debris off the plywood surface. It is probably a low content, eg. Floor tiles need to be thick to withstand years of foot traffic, the weight of furniture, and the sharp shock of dropped objects. However the tiler should apply a Primer before screeding such as. Discuss Advice for self-levelling over old tile adhesive, using Wickes latex? in the Tile Adhesive area at TilersForums. You can test the floor dryness with a gloved. According to the industry standard for ceramic tiles with a length greater than 15 inches, the variation in flatness should not be greater than 1/8th of an inch in 10 feet. A Prime (or a Prime Number) is any whole number that cannot be divided by any other number except itself and 1, without a remainder. 4 hours and ceramic tiles after 3 hours ¥ Suitable for use over old adhesive residues including bitumen ¥ Moisture tolerant - can be used below. Make sure to install movement joints in the screed over any structural or cold joints in the balcony. These BS 8204-7 compliant, quick-laying screeds are less labour intensive and. 2 litres of water with a slow speed drill. I was charged £2,600 and although I knew this was expensive I put. Such products may still require 12-24 hours to dry our completely (depending on thickness). ) Apply with a clean brush, sponge or roller and then leave to dry. 3. A primer is a liquid product, which can be either latex, epoxy or polyurethane based, and is used to create better adhesion onto the substrate before tiling or screeding. of the adhesive, screed and waterproofing compounds onto the surface. Gypsum based screeds: According to the applicable standards, the residual moisture of gypsum based screeds should not exceed 0. 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. Immediately trowel back over the skim coat, using the notched side of the trowel to create a pattern of ridges and valleys in the wet adhesive. For decades. Secondly, screed over it with a self leveling compound, and let that dry. It’s walkable in only 3 hours, receives ceramic, or stone tiles from 4 hours, and resilient floorcoverings from just 48 hours. Tiles Installation and Fixing Procedure. Use a 3/4- or 1-in. Step 5. For larger tiles made of either ceramic or porcelain it is important to get the most effective adhesive on the market. While putting a self-leveling compound on Bitumen floors is not recommended, a few other tricks can help, like applying PVA primer or using Ardex 2-part self-leveling compound that combines latex with the concrete. ARDEX K 40™ RAPID. ball & young stopgap green bag self leveling compound powder. Alternatively, another option is to strengthen the substrate with either a layer of floor screed or by overboarding with plywood/tile backer board, and then using an. Peter Newman Flooring. any good floor layer will be able to screed out a 5mm dip in your. 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. ARDITEX NA can be applied on all common subfloors such as concreteStep 4: Mix Mortar. after removing existing tiles or where bricks/blocks are uneven. Tiles with ribbed or keyed back profiles should also be back-buttered to ensure complete coverage. Installation of Heated Screeds and Substrates for. For wet areas such as. Resilient floorcoverings can be installed after just 4 hours and ceramic tiles in as little as 3 hours. Removing the laitance by sanding to provide a key for the primer and/or adhesive. Iam a floor layer with 25 five years experience. None of those apply to wall tiles, and the reduced weight of a thinner tile makes for easier installation. ARDEX Screeds will pass a BRE Screed test in as little as 6 hours, rather than 2 weeks with conventional screeds. Apply a screed on the concrete. A primer is a liquid product, which can be either latex, epoxy or polyurethane based, and is used to create better adhesion onto the substrate before tiling or screeding. Apply a second coat evenly (if required). However, unevenness over 0. Sounds like you need a suitable DPM, prime and screed. com. A. Porous unglazed clay or stone tiles, on the other hand, require no additional preparation. CHOOSING A PAINT FOR TILE FLOORING. Country. Under ‘wet’ consistency toppings/overlays; 4. If your tiles are loose, cracked, or broken, you will need to repair or replace them before applying self-levelling. With an average labour cost of £11 per square metre, we arrive at a screed floor cost of £26. Ceramic wall tiles are thinner for several reasons. Use latex screed. 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. Latermix Cem Mini can also be used as. Finally, allow the floor to dry naturally to avoid cracking. Mastic is a general term for a type of glue-like adhesive. 2. Step 6. 2. When the old floor material is a still strong ceramic tile surface though, you can place the new covering over the tiles as long as you create a smooth surface beforehand. I am hoping to cover it all with a vinyl sheet. Uplift the tiles Latex screed NA 2x coats dpm Latex screed New tiles Anything else, could end up being false economy. Ive also had 70 m2 latex crack over vinyl tiles. Cover the floor in plastic sheeting. 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. Country. laminate is ok. Next, with a brush or roller, apply high-gloss or semi-gloss latex. To be confident you’re starting with a flat, smooth surface, you should render the walls and screed the base. Old fire blankets and heat resistant gloves can also be made out of asbestos textiles. Screeds / Mortar Beds . Bonded. Kerlite tilling, for example, is very hard to cut. Step 5 – Measure & Draw a Diagram. Estimated Cost: $75 to $100. Work the chisel between the tiles and the concrete, hammering them up with a 2-lb. Answered 14th Jan 2022 Like 0. ”Information Paper from IHS BRE Press provides practical guidance for architects and specifiers. a screed should be used prior to fitting any amtico or LVT (luxury vinyl tile) flooring. Needs mixing with a. ARDITEX NA can be applied on all Screeds & Mortars for tiling works. With the application of DITRA matting, tile coverings. There are two types of screeds - Bonded and Unbonded. #2. Mudster - Nov 3, 2005 #2. Now time to ask the ID who say no need screeding why they say so. If you have the height you could tile over the top - its not ideal. Step 3 – Use a priming agent. Mixing and application of Nitotile GP shall be as follows; 20kg of Nitotile GP shall be mixed with 4. Then once the screed is dry use a liquid DPM such as F-Ball Stopgap F77. laid for anywhere from 40-60 days after the screed is placed, dependent on screed thickness. Below the tape there will be no paint, so your ceramic tiles will now have a perfect border. Andy O'Hara. The floor leveler will fill in previous grout lines and make the floor level for the tile over tile application. Tile keeps getting bigger and bigger. Fibreglass * Prime. In wet areas, Nitotile GP from m/s Fosroc shall be used as ceramic tile adhesive. If you have the height you could tile over the top - its not ideal. To flash the floor, the guys are using Kerabond mortar with Keralastic latex additive because it bonds so well. 2. MoreEasy and affordable, the three-step paint process goes right over laminate, cultured marble or ceramic tile, resulting in automotive-grade durability from safe, water-based materials. If you are installing where existing floors have been removed, check that there are no traces of previous adhesive residue. ball & young stopgap 128 latex liquid, mixed with f. The surface should be mechanically prepared by either shot blasting or grinding. 2. Using the notched side of the trowel, comb the mortar to produce an even surface. whats the Best latex for screeding over ceramic tiles? ardex na have also used green bag and mapei latex plan make sure you prime first. If there is a significant trench where the grout is – fill it and seal it. The example of bumps (OP's problem) of one quarter inch maximum, should prove no problem needing levelling (for flat/smooth). Like 4. 0. For bathroom wall tiles, it is important to take note of the material they are made from. 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. Good ol’ shovel work. Reply to Kitchen Floor tiling on Latex Self Levelling Compound in the. When bonding directly to the substrate with a bonding agent or a primer the minimum is 1-2mm (feather edge) with smoothing compound. Lay it over your floor and lift the low end until the bubble is central. Definitions The following definitions are used in this document. a suitable primer (depending on sub floor) should also be used. 1 Step 1: Remove the adhesive residue. Laitance must be removed by sanding using a rotary floor sanding machine and this should be carried out between 7 and 10 days after the screed has been poured. if its in screed then you'll be fine and won't damage it, if its over the screed wire or mat then you'd be lucky to be able to get it up without damaging it. Rich mixed up a 5 gallon bucket according to the directions and let it slake for 5 minutes before mixing it again. The first thing to. . Rich. bournemouth Super Moderator. Thirdly, paint again with the liquid DPM and let that dry. ReadyToDIY is the owner of this article. The floor leveler will fill in previous grout lines and make the floor level for the tile over tile application. you might just have a low spot along the old wall where the concrete meets the wooden floor. The average dimensionof the sampleistheaverageof40 measurements. 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. Applying Screed. Over the backs of ceramic tile, stone or brick before placing concrete or mortar during fabrication of ‘negative’ cast panels. 6N / mm2ARDITEX NA provides excellent adhesion to almost all substrates without the need to prime, including flooring-grade plywood, ceramic tiles, steel, and even over old bitumen adhesive residue. Make sure you leave the screed to go off properly before laying the new vinyl tiles, Each screed has its own reccomendations so read the pack and follow the instructions. The mortar has an open time (work-able time) of about 1 hour. They flow like liquid across substrates similar to ‘self levelling. Uplift existing tiles and latex screed subfloor, like another fitter said use Arditex NA that way there is no need to prime subfloor first, Saving you drying time and of course money. With a floor leveling compound, the smooth subsurface is easy to create. NOTE: Arditex NA should not be used on top of vinyl. Flowcrete UK’s range of Isocrete Self Levelling Screeds offer numerous advantages for both new build and refurbishment projects. • The recommended adhesive for this application is ProGrip Flexibond for ceramic tiles or ProGrip Porcelain Fix for porcelain tiles. Total Time: 2 wks, 1 day - 2 wks, 2 days. Screwfix customers rate this product 4. 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'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. SR3 10mm. 1 Sand-cement screeds should generally incorporate a latex additive (such as Planicrete). Put simply, a screed is a hard coating flooring surface similar to concrete. 4 Expression ofResults The averagedimensionofsquare tiles is the average of four measurements. Installing cement board won’t work, and if you choose to lay down a mortar bed it takes longer, it’s harder to achieve an even surface, and the screeding process can damage the heating. Remove cork tiles and then screed over concrete and remaining quarry tile/ cork. Any tile installation can fail from a lack of using a tile adhesive primer. You’ll also see tile adhesive used as an underlayment beneath laminate flooring or. Most projects will have one of three different types of substrate as follows: Construction TypesPalace Trade-Flex, Multi-Flex or Easi-Flex adhesives are all recommended for fixing over a prepared anhydrite screed and the use of a pourable thick bed adhesive with built-in polymer such as Palace Flexi-Set Thick Bed will be advantageous when fixing large format (600mm x 600mm) floor tiles. Hi, Our house was built in 1983 and we have a 7m x 3m front room/dining room and want to install Warmup electric underfloor heating with laminate. Because concrete has the potential to hit very high strengths, it is used across the construction industry for. Measure the gap between the floor and the raised end to check how far out the floor is. 6 mm/m) can contribute to problems. Lee Allen New Member. Available styles include: All these products are water-resistant and help to seal the surface against moisture. You can paint over any blemishes or missed spots that the painter's tape covered up, but be sure to let them dry. Every room was covered in thermoplastic ("Marley") tiles, attached with a thin layer of bituminous adhesive. Skill Level: Intermediate. it could easily be up and down by up to 15mm. The slurry is usually just 1 mm – 2 mm thick. USES Davco DW 1 may be used as a mortar additive for fixing. A slow or rapid-setting adhesive can be used to apply porcelain tiles onto your screed. Ceramic tiles: 3-5 days : 50-70mm: Carpet: 6. can i latex screed over the whole lot without removing the cork tiles which are very well adhered to the quarry tiles? or 2. Be careful of latex compounds that say they can go over ceramics with no primer. ” Note: New Tile Installed Over Existing Tile - When new tile is needed in existing pools, new tile can be installed over existing tile using 254 Platinum or 254 Platinum Plus provided that the pool is in good condition and existing tile is well bonded. Handyandy Screwfix Select. If a dipping grade adhesive is not wanted, then the trowel applied Styccobond B95 adhesive can be used instead. Mix 1 part water to 1 part Prime & Bind. LVT is warmer underfoot than tiles anyway so you’d probably not notice the difference that it will make for heat travelling, any cold spots will probably feel warmer too. 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. flooring bloke New Member. That will stop any raising damp to your vinyl. 8: Terrazo paving: 0. Uplift existing tiles and latex screed subfloor, like another fitter said use Arditex NA that way there is no need to prime subfloor first, Saving you drying time and of course money. Resilient floorcoverings can be installed after just 4 hours and ceramic tiles in as little as 3 hours. Wickes have a very good product, Latex self levelling screed, goes hard in about and hour or two and only need to leave it 24hours before applying new floor. Vinyl Flooring Options. BS8204 Part1. Use a large carpenter's level to identify low areas of the floor. 3. FAMILY HANDYMAN. The subsequent application of the tile adhesive is made easier and more cost effective by removing the need to pack out dips and uneven areas with excess product. thank you very much for the clarification. A levelled surface is especially important using large format tiles. Once this is completed and securely nailed down (at four inch centres) you will be able to fit the vinyl or lino floorcoverings. However, with unsatisfactory fixing practices or in certain climatic conditions, moisture expansion in excess of 0. 966 289 0.