9") onto all walls and pillars. 0. 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. Discussion in 'Subfloor Preparation' started by SandyFloor, May 30, 2011. A38 is an engineered screed system based on a specialised cement powder and separate sand-aggregate mix. Removing the tiles might give us a bit more room. 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. Replace the grout in the lines using a grout float to push the grout into place. 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. The mixed adhesive shall be applied over the protection screed to a thickness of 3mm up to 1 sqm at a time. Apply a coat of surface liquid DPM to the tiles like Ardex DPM 1c or stopgap F77 then prime and screed. Not actually used it myself (yet) but looking to level my garage floor so done a little research. There are three main types of screed – bonded, unbonded and floating. Over plastic, semi-dry consistency traditional mortar beds (min 20mm thick) before beating in pavers and ceramic or stone tile in cold climate conditions. Supplies. Screwfix Select. Maximum gap measured with a slip gauge. 4 Use a screed to level the. AS 3958. • For use with porcelain tile and over a wide range of floor surfaces when mixed with Polymer Additive (#13956) instead of water. What's the best latex / screed to cover ceramic tiles. Yes you can lay an LVT product over ceramics as long as they are solid to the subfloor, remove any ceramics that are broken or loose. This time I mixed more screed and poured it over the area in question. 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. Decorative floor coverings can be installed after 4 hours and ceramic tiles can be applied after 3 hours. co. Latex Floor Screed Thickness. Before you tackle how to tile an uneven floor, it’s really important to use a good primer i. Hi Charlotte, I wouldn't screed over them as the adhesive used under the Marley tiles will be a very week bond and over time walking on the floor they can come loose which will then crack the screed and then the Karndean will be up. Your best option now is to take up the ceramic tiles, adhesives and grout then fasten down the 6mm plywood mentioned above. you cant put the dpm directly on to the. Volume. Around £12 I remember but will probably be way too much quantity for your small area butafter removing existing tiles or where bricks/blocks are uneven. For ceramic tiles up to 30cm x 30cm or porcelain tiles up to 10cm x 10cm you’ll only need a low grip adhesive. Modified sand and cement screed can start at 10mm, that is for a rapid strength and fast-drying product. Screed floor leveler over low areas using a 2×4. As long as the old floor is in good condition and can allow the new mortar to stick properly, it should not be a problem. Builders often refer to latex screed as a ‘levelling screed’ for this reason. wowfudge · 03/08/2017 14:00. they will 99% of the time be a very poor strength compound. Andy O'Hara. Our wide experience and the quality of our products means we will always be a trusted partner that can meet all the requirements of a constantly. bournemouth Super Moderator. 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. 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. Northampton •. Actual jobsite coverage may vary according to such factors as job conditions and application methods. A) ARDITEX NA ® can be used with confidence over almost all subfloors without priming including ceramic tiles, bitumen and flooring grade plywood. Hence they need to screed, because dont have ppl who put 30mm of cement before laying tiles. All these products are water-resistant and help to seal the surface against moisture. It is a considerably cheaper alternative to a full renovation as no hacking is required. 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. Answered 5th Apr 2021. Image caption- S 15 C polymer adhesive used for slurry consistency. By contrast, asphaltic cutback adhesive is an older type of mastic made with asphalt-based cement. I was charged £2,600 and although I knew this was expensive I put. Over the backs of ceramic tile, stone or brick before placing concrete or mortar during fabrication of ‘negative’ cast panels. LATAPOXY 310 Stone Adhesive is a two component, high strength epoxy adhesive, which is formulated for the spot bonding method of tile and stone installations on vertical surfaces. Available styles include: All these products are water-resistant and help to seal the surface against moisture. 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. It is probably a low content, eg. Additionally, being able to use these over wood. The products are mixed together, poured onto the floor and trowelled to a flat finish. A range of smoothing concrete for a smooth, permanent finish to a variety of internal substrates prior to the installation of floorcoverings, choose ARDEX. Floor levelling compound is also known as self-levelling compound. SandyFloor Well-Known Member. (3/4” min. Next, with a brush or roller, apply high-gloss or semi-gloss latex. 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. It can be difficult to determine how much flooring you will need, but at Tile Wizards, we have a method that never fails. Used to smooth and level floors in preparation for laying a wide range of floor coverings on top which is important as this base layer will effect the overall finish you get from the project. If you're laying Karndean over existing flooring, be sure it is properly prepared. Screed: 20 mm over 3 m . Sounds like you need a suitable DPM, prime and screed. Both screed and concrete are referred to as being green during the period from. It pours wet and then dries to create a solid flat surface that is highly durable. 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. 5% prior to the installation of tiles. Laying ceramic tiles by Semi-Dry Mix Method. 1. flooring bloke New Member. 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 -. you might just have a low spot along the old wall where the concrete meets the wooden floor. Fibreglass * Prime. You would question why you would want to go that deep with screed, and not use a void former. steve have you checked the level of all of the concrete floor. I asked a contractor who happened to be in my company and he say the same thing too. 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. The next membrane width is rolled out so that the edges of the. Wickes sell 'Setcrete Floor Leveling Primer' , which seal porous, dusty surfaces prior to pouring the levelling compound. I asked a contractor who happened to be in my company and he say the same thing too. bournemouth Super Moderator. Floor tiles need to be thick to withstand years of foot traffic, the weight of furniture, and the sharp shock of dropped objects. If you're installing vinyl plank flooring over an existing ceramic tile floor, check that the grout lines are no larger than 1/4. Good ol’ shovel work. The average dimensionof the sampleistheaverageof40 measurements. Wall tile adhesive tips. Answered 17th Jan 2012. Country Availability. Screed is commonly set underneath timber, carpet, resin coating, natural stone, tile and vinyl flooring. Epoxy DPM * Existing Adhesive Residues. Floorcoverings can be installed after as little as 15 minutes. Installation of Heated Screeds and Substrates for. Any undulations in solid floors must be patched using a self levelling compound and feather edged to the surrounding area. Like 4. Country. An acrylic primer should also be applied to the surface that will ensure your tile adhesive will efficiently bond to the screed. The correct way to this job would be to lift all the floor tiles, lay marine plyboard down and secure it with screws. Essentially you use the tip of your shovel to knead the mixture. 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. Remove cork tiles and then screed over concrete and remaining quarry tile/ cork. I gather you are planning on putting down a floating wood floor i. Planning - Calculate the number of tiles - Setting out - Laying the vinyl tiles - After care. Latex levelling screed levels out uneven substrates leave a smooth surface to bond to. ARDITEX NA can be used with confidence over almost all subfloors without priming including ceramic tiles, bitumen and flooring grade plywood. Discard any material that has exceeded the pot life or working time of the product. In most cases with correct prep and the tiles being sound this isn't a problem but here's the question : Would you use the less. Back-buttering is not necessary. Because concrete has the potential to hit very high strengths, it is used across the construction industry for. I’m here to talk about latex floor screed. e. hi. 4 Expression ofResults The averagedimensionofsquare tiles is the average of four measurements. Self-leveling Properties: Ceramic tiles may have minor level. When laying vinyl, ceramic tiles, carpet and other floor coverings. Resilient floorcoverings can be installed after just 4 hours and ceramic tiles in as little as 3 hours. A common practice among Singaporean homeowners, overlaying tiles is the process of laying new tiles on top of existing tiles or vinyl flooring. As a result, bigger tiles require flatter floors. I would assume that. Existing Ceramic, Porcelain and Natural Stone Tiles * Flooring Grade Asphalt & Bitumen* Anhydrite Screeds. . Hooe this helps. Go to product. They also flog a ply-backed insulation board but don't divulge how they glue it on!The Bottom Line. Get ideas for concr. Ideal for fast-track tiling, ARDEX AM 100 is ready to receive tiles after just 2 hours, regardless of thickness. 5 millimeters (about 3/8 inch) and typically float over the subfloor. The dpm resin, is a sticky gooey 2 part epoxy based liquid to be precise. Nonetheless, as simple as this process might sound, there is a lot more to. Use painter’s tape in combination with a drop cloth or plastic sheeting to protect nearby surfaces from errant paint. 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. The floor leveler will fill in previous grout lines and make the floor level for the tile over tile application. Self-levelling screeds are applied in a liquid form which smoothes itself out over a given area. kitchen floor on concrete with ceramic tiles to be fitted on top. DON’T stretch the peel-and-stick tile too much when installing. Fiona_cooks New Member. 5-6. they will 99% of the time be a very poor strength compound. pnfl. Installation of Ceramic Tile in Swimming Pools,. 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 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). However, unevenness over 0. Both times was because they didn't want to remove asbestos tiles. Check out our website and and contact us for more information. Lay down polyethylene or PVC sheets to separate the concrete from the screed layer. ceramics I don’t know. 1. PRIMINGDescription. Contents [ hide] 1 Tiling over a waterproofing membrane, some helpful tips: 2 Decoupling mat floor tiling, some helpful tips: 2. Old tiles adhesive should be removed anyway before laying the self levelling compound this because is the way a professional will do the job. 3m x 4. Resilient floorcoverings can be installed after just 4 hours and ceramic tiles in as little as 3 hours. Step 1 – Fill Large Grout Lines. 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. It is possible to waterproof and tile over existing tiles, provided the existing tiles are in good condition and firmly attached to the substrate. Answered 14th Jan 2022 Like 0. b. 3 Comb the mortar. Once this is completed and securely nailed down (at four inch centres) you will be able to fit the vinyl or lino floorcoverings. With more than 10 years of experience in the tiling industry, their trusted and dedicated tilers are experts in completing tiling works for homogeneous tiles, ceramic tiles, porcelain tiles, marble tiles, and all sorts of floor. Now time to ask the ID who say no need screeding why they say so. Tip the mixture into the area you are screeding, and level out to. Resilient floorcoverings can be installed after just 4 hours and ceramic tiles in as little as 3 hours. For decades. However, with unsatisfactory fixing practices or in certain climatic conditions, moisture expansion in excess of 0. Nonetheless, as simple as this process might sound, there is a lot more to. Under ‘wet’ consistency toppings/overlays; 4. Use a level to check the floor. At the same time i will be screeding over the main floor in the building, this is 7. ARDITEX NA can be applied on all common subfloors such as concreteStep 4: Mix Mortar. 1. ARDEX A48 is a pre-bagged and mixed version of this material. Walls: 4 mm in 2 m. “A common cause of problems in rigid tiled flooring is cracking, associated with underfloor heating. Peter Newman Flooring. 1. Make sure to install movement joints in the screed over any structural or cold joints in the balcony. Where it differs from other smoothing products is that there is a latex additive. Use duct tape to try and rip it off like a waxing strip. 1. Submit your price for the work in a written change order and get signed and dated approval. Sandwiching will give you a nice flat surface and also eradicate any water vapour coming up through the screed and ruining your flooring. 3. The surface should be mechanically prepared by either shot blasting or grinding. ARDEX Abacrete. scraper to pry and scrape it up. Ultra Floor - Prime IT - Multi-Surface Primer (MSP) - 5 Litre. 5:25 AM. Flooring is the general term for a permanent covering of a floor, or for the work of installing such a floor covering. You can latex over ceramic tiles no problem as long as you use the correct primer. 215: 10 mm thick granite floor tiles + adhesive. Latex screeds are self-leveling compounds usually consisting of a powder and liquid latex. Hi, quite a common problem tbh. When applied over well-prepared ceramic tiles, it ensures a tenacious grip, minimizing potential issues related to delamination or detachment. Only really suitable for domestic loose lay vinyl. masonry chisel and a 2-lb. Rapid dry technology – Install most flooring in as little as 2 hours*. 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. • The recommended adhesive for this application is ProGrip Flexibond for ceramic tiles or ProGrip Porcelain Fix for porcelain tiles. Why Choose Latex Screed for Overlaying on Ceramic Tiles: Exceptional Adhesion: Latex screed is known for its excellent bonding capabilities. SR1 3mm. Thoroughly sweep and vacuum the entire floor. AS3958. 6 Step 6: Do as Planned: 6. How to Install Sheet Vinyl Flooring Over Tile. The example of bumps (OP's problem) of one quarter inch maximum, should prove no problem needing levelling (for flat/smooth). It can be applied over virtually any substrate such as old adhesive residues and ceramics. Place the mixed product onto the area to be ‘screeded’ and screed to the desired thickness and plane using an appropriate straight-edge. Ensure the floor is fully dry - the residual moisture level should be less than 0. 2. Removal of the tiles is non-licensed work, ie. ReadyToDIY is the owner of this article. PT Flooring Specialists. 5/5. 4- wait for approx 4 hrs for slurry coat to dry 5- self level floor with mapei renovation screed slc (my preffered choice). Scotts Plumbing & Property Maintenance Limited. 3 Step 3: Stacking Tiles: 6. Provided the tiles are sound and are protected by an underlying damp-proof membrane, skim over the tiles and fill the joints with a latex screeding compound in preparation for laying the vinyl tiles. 30758. Using chalk or a pencil, mark low and high points and check again for any ridges or depressions you. Strike the face of stubborn tiles to break them up for easier removal. 5Ltr at Screwfix. Latex floor screed is the ideal solution for levelling uneven floors and preparing surfaces for the application of floor coverings such as carpet, vinyl and ceramic floor tiles. Over time, an increase in stress build-up will make the tiles more likely to pop. C. 7 Fixing Cracks in the Concrete Floor Before Tiling, some helpful tips. LATAPOXY® 310 Stone Adhesive. 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. 2. Fast Setting Screeds Allow a faster setting time to achieve foot traffic within a shorter period. Green screeds are usually 1:3 or 1:4 cement and sand at a usual thickness of 50mm. According to British Standards, any deviations should not exceed 3mm when measured under a 2m straight edge. I have an early 1970s bungalow with concrete floor. 1. As a result, it is not advisable to screed over asbestos floor tiles. One of those options is a new layer of ceramic tile. Total Product Weight. You can paint over any blemishes or missed spots that. 3. 322. Under ‘wet’ consistency toppings/overlays; 4. 8 Mpa). 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. Thicker substrates require 2 days per mm. 2 Check for hollow tiles. For a full flooring renovation, hacking is required to remove the existing tiles. Easy to use by mixing with water according to the manufacturer's instructions to get. 16 Aug 2013. Mix a small batch of thick screed and in-fill where the tiles are missing. can i latex screed over the whole lot without removing the cork tiles which are very well adhered to the quarry tiles? or 2. e. ball & young stopgap green bag self leveling compound powder. Professionals often prefer using the 2-part compound since it provides faster results and has a shorter. footprints and trowel marks. Alternatively, you can use a flat shovel or a floor scraper. 2. The screeds primary purpose, using one part cement to three to five parts sharp sand, is to give a smooth and level floor on which to lay your chosen floor finish. It can be applied to Stopgap levelling compounds, structurally sound, smooth, dry, absorbent subfloors of concrete and sand/cement screed and plywood (minimum 6mm flooring grade). Didn't blow but cracked big time The first thing to consider is the condition of the ceramic tiles. BS8204 Part1. Screeds are typically bonded onto most concrete. Shovel up a full load of mix and dump it on top of the mixture. . Apply as a bonded, unbonded or floating screed. Adding a little extra water to a thick mix can make it spread easier, might increase drying time slightly. N. A) ARDITEX NA ® can be used with confidence over almost all subfloors without priming including ceramic tiles, bitumen and flooring grade plywood. Mapei prim grip is the grey primer. USE To level uneven internal subfloors to provide a smooth surface. Renovation property: £135 to £185 per square metre. 3 from AS3958. #1 hi all. If your tiles are fairly level than scrape your trowel over the floor to apply a very thin coat on the surface of the tiles while infilling the channels. Once the tiles are rumoved there will still be bitumen on the sub floor. The function of a primer is to prepare the surface and increase the bond. Tile adhesive is a specialized material designed for bonding tiles to surfaces. ”Information Paper from IHS BRE Press provides practical guidance for architects and specifiers. 5m and need to be about 65mm thick. Work the chisel under the tiles, forcing them loose. Work the chisel between the tiles and the concrete, hammering them up with a 2-lb. Use a 2×4 to screed the floor and completely. Use latex screed. hand maul. Rich. Rich mixed up a 5 gallon bucket according to the directions and let it slake for 5 minutes before mixing it again. A slow or rapid-setting adhesive can be used to apply porcelain tiles onto your screed. Over the years one side has very slightly moved out of sync with the other and using a thicker bed would have lost any irregularities in the surface. The tiles have been removed in some rooms, leaving the bitumen, probably <1mm thick, and not sticky. 1 to set ceramic and stone tile, including large format tiles, over the KERDI membrane. 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. 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. In this concrete floor video, industry expert Bob Harris shows the steps for installing a new concrete floor over an existing tile floor. LATAPOXY 300 Adhesive is a chemical resistant, epoxy adhesive that will bond to most sound, clean surfaces. Below the tape there will be no paint, so your ceramic tiles will now have a perfect border. Hope this helps, Chris M-W. laminate is ok. 5 mm must be completely compensated. Step 5 – Measure & Draw a Diagram. Before laying self levelling screed, its suitability needs to be determined. the bottom line is no,the ceramics will show through in a few days this will result in short life expectency of the flooring,a suitable latex screed is needed to level out the ceramics then you can achieve a flat surface to recieve the floorcovering. Hmmmm Tiles should be installed using a latex modified adhesive system, i. Abstract. Kent. Keep going until you’ve shifted the entire mountain atleast 3 times. It is possible to waterproof and tile over existing tiles, provided the existing tiles are in good condition and firmly attached to the substrate. Examine the grout lines. A 'self levelling screed' is a generic term given to a group of products which are used to create smooth floors prior to the installation of the floor covering. 06% (0. If you have the height you could tile over the top - its not ideal. Packaging: 25kg bags. 1 Add a decoupling mat to the substrate. Screeding over ceramic tiles. A self-leveling compound is. SikaCeram® Sealing Membrane W Flexible sealing and decoupling membrane used for waterproofing walls and floors under tiles in wet rooms. I would recommend F-Balls products. AS 3740-2021 – Waterproofing of domestic wet areas 3. Granolithic screed - A specialised type of sand-cement + aggregate screed, where the sand is replaced by a sand-gravel mix with a size range of typically 0-4mm in most usages. Drying times vary according to the brand of. Www. However, this product is not recommended as a final finish, but rather to provide an even subfloor for installation of your choice of final floor covering, whether this is tiles. 7 kg. I want to install LVTs over. Cost effective – up to 50m² coverage per 11kg bag. Ive also had 70 m2 latex crack over vinyl tiles. This will ensure that the new screed is level and free of any bumps or dips caused by the tiles. Cement screed flooring Singapore: pros and cons. Coverages provided are for estimating purposes only. 2-2012 – Waterproofing membranes for external above-ground use – Part 2: Design and installation B. Further information is we eventually want a hard wood or engineered wood flooring. III. The mortar has an open time (work-able time) of about 1 hour. 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. 5). Or 1/16 th of an inch in any 24-inch substrate. Add 2 litres of the combined liquid per 20kg of screed and use your drill mixer on low speed to blend until it is smooth. 3. They come in thicknesses ranging from 2 millimeters (about 1/16 inch) to 8. Definitions The following definitions are used in this document. not a water based mix. There is no additional water, just pour the. 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. MAPEI recommends adding 5% to 10% in overage to ensure. Apply the mixture to the floor, and use a floor brush to scrub the floors. 6. Over the backs of ceramic tile, stone or brick before placing concrete or mortar during fabrication of ‘negative’ cast panels. 2. If nothing comes off, it’s fine to tile over. Search the floor for any loose or damaged tiles. you will need to mix x1 bag of powder & x1 bottle of liquid per 5 mtr sq. Step 6. ARDEX Screeds will pass a BRE Screed test in as little as 6 hours, rather than 2 weeks with conventional screeds. It’s walkable in only 3 hours, receives ceramic, or stone tiles from 4 hours, and resilient floorcoverings from just 48 hours. Moisture testing to confirm the dryness of the screed before tiling commenced. Step 4 – Remove Baseboards. 2. 5 litres per 20kg bag of screed. Products for Ceramics and Stone Materials. DIYDave. then a liquid membrane goes over this called ardex dpm 1c. Work the chisel between the tiles and the concrete, hammering them up with a 2-lb. 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. Chances are there might not be a damp proof membrane under the tiles as well. screeds to dry out to some extent prior to installation of ceramic tile finish 1. In warm and well ventilated drying conditions allow 1 day per millimetre up to 40mm in thickness, so 40 days if 40mm. Then mix a lighter, creamy batch and wash over the floor. Use to level and smooth interior concrete, terrazzo, ceramic and quarry tile, epoxy coating systems and non-water-soluble adhesive residue on concrete. Screeds / Mortar Beds . Start at a broken tile or between tiles where the grout has loosened. applied from 1’ – 2 ½” (25 – 63mm) mixed to a semi-dry consistency and placed over a latex/cement slurry bond coat consisting of 254 Platinum, 254 Platinum Plus or MULTIMAX.