Let’s look at some advantages of acrylic rendering. and we want to make it as easy to maintain as possible. EWI-040 – Silicone Silicate render. External wall insulation can be polystyrene, mineral and rock wool, phenolic foam, PIR (poly It is then applied to the wall with a notched trowel and then turning the notched trowel over to the flat edge, embed the mesh into this adhesive. External wall insulation Materials Calculator. The problem is that water vapour in the air always penetrates the exterior walls. The Silicone Silicate render comes in a few various different textures, but by far our most popular is the 1.5mm render (read our full guide to render grain sizes). Do not apply the top coat render to a wet base coat. EWI-6640 – Fibreglass mesh Also known as a thin coat render system it can be applied directly onto masonry or EWI board systems by hand or machine. To find EWI Pro installers click on the following link: http://ewipro.com/installers-directory/. What do I need for rendering in the Winter? It has a lot of rendering. You don’t need to apply more than two coats of acrylic in this kind of rendering. Before you use the acrylic render though just a couple of things to consider – firstly it is not breathable. Above all, they feature high resistance to water and are available in a wide range of colours. So why do people use it? I would like to receive news and offers from EWI Store, Your email address will not be published. If it is mineral wool, which features very little diffusion resistance, also subsequent layers, i.e. All the renders we sell in the EWI Pro Insulation System range are BBA Approved –  Products that receive Agrément Certificates are recognised by building control, government departments, architects, specifiers and industry insurers. Acrylic render provides a highly durable, colour fast and anti-crack finish, offering much greater levels of flexibility and weather protection over that of traditional base renders. check out my web site as well and tell me how you feel. Do any of these different types of render resemble pebble dash. What is your view? At some time in the past it was painted. No cracks Save my name, email, and website in this browser for the next time I comment. Vapour penetrates the wool but cannot leave it as it is blocked by the plaster. Unit 1 the this is the stuff to use – by the same token, this quick drying render is the one to use if you are installing in particularly humid or cold conditions since it will help minimise wash-off (when the render doesn’t stay in place due to rain or other unforeseen weather conditions!). Render suits traditional homes just as well as contemporary — this traditional oak-frame self build by Border Oak home combines a gable with exposed oak frame with lime render (Image credit: Jeremy Phillips) Acrylic renders are most often applied as a thin finish coat to seal and enhance the appearance or the underlying coat. Faraday Road Once this has been done, let it go off, then prime the surface and apply the top coat render. an area of wall around the damaged area is taped off (ideally a square) then the damaged material is cut out. This gives these new render finishes a flexibility that you just don’t get with standard sand and cement renders. Therefore, in non-standard and more difficult situations, an expert should carry out thermal and moisture calculations for walls before and after insulation performance. the repair is still visible to the eye. Simply put, render is a paste-like substance used on interior and exterior walls. Once they do get soiled and tired they can be freshened up by painting with a silicone smooth paint which can be roller applied. The original coating would have been lime wash but I still am a little nervous about putting a resin type coating over lime render. Each of the silicone renders has a different price but it is worth mentioning that all renders are going to cost more than acrylic render because you are getting a vastly better product. The aforementioned limitations must not be neglected as it may lead to increase of thermal-insulation material moisture, fungi development and plaster coming off the facade. If the EPS comes away in your hand then the underlying render is sound. In terms of installs around the country, Mineral Render is particularly popular in both Wales and Scotland due to temperature and volume of rain. EWI-220 – Basecoat Adhesive We live in a woody area. A typical example is a thermal insulation covered with thin-layer plaster. Hi DaveOmell, it really depends as you have alluded to on the existing render and how good it is. It is apparently originally a German invention. External Wall Insulation, Installing Render and EWI During the Winter Months, Acrylic Render vs. Again, much like the Acrylic render we don’t advise installing this render during the harsh winter months or when it is raining as the system does take a few days to cure – but once installed it should be maintenance free for over 20 years although it make require the odd pressure spray from time to time to keep it nice and clean. The highest performing will be a Silicone … When mixing acrylic render you cannot really mess up the mix, but you need to make sure the mix is consistent for application. 0203 3974067, Aylesbury Dampened wool loses its thermal insulation properties and creates conditions suitable for development of fungi. Silicone render is our preferred choice as it offers better durability and colour retention compared with acrylic render. Can this be put on in the winter months? We are buying a house in Cyprus and, as many houses there, some of the rendering is crumbling. Acyclic is available in pre-mixed buckets, which usually have more elements than the cement render equivalent. EWI STORE 2014 - 2020 All rights reserved /. Acrylic Render is the most cost effective render when you consider the labour and material costs – requiring just one application. For a 1.5mm render this will end up between 1.5mm and 2.0mm thick. Acrylic plasters are not intended as a finishing layer for thin-layer walls of aerated concrete blocks and porous ceramics, where the thin-plaster is applied as the final finishing layer onto the traditional cement and lime plaster. Secondly mineral render dries much quicker than all the other types of render we offer so if you are installing in wet climates (I know most of the UK is normally under the water!) Acrylic plasters are not intended as a finishing layer for thin-layer walls of aerated concrete … Some installers do indeed offer warranties, we do run training with EWI Pro, one of our main system manufactures – if you go to their site you can find local installers who should 1. know what they are doing and 2. offer warranties! Acrylic plasters Acrylic plasters TA 11 Acrylic RenderSee more form a water vapour barrier (feature high diffusive resistance), whereas silicone ones are vapour permeable. Do you sell a render that will help prevent algae / vegetation taking hold on the render? Most renders are difficult to repair only in that the thickness of the rend is extremely thin when applied to the wall. Acrylic Resin is a type of plastic and added to render it helps offer better stain and water resistance as well as greater resistance to cracking. Acrylic render usage has increased rapidly in the last 10 years with one of the main reasons being the ease of mix. If when you pull the EPS, it comes away with the adhesive and the existing render then you are better off stripping that area of existing render before you start. While we don’t like the stone pebble dash, we do want to recreate the same texture. If you do their training then you get discount card for this store. wall) without mixing it first with water. 1m x 50m Fiberglass Reinforcing Mesh used for external wall insulation systems, mineral, acrylic, silicone and silicate renders. Is silicone silicate really worth the extra money? Our EWI Pro Mineral render is the only one to come as a dry mix – you need to add water to it before applying it. Apply a coat of PermaRock K & R Primer (colour to suit) onto the Base Coat by roller or brush. Sign Up! The total basecoat layer (sometimes referred to as the reinforcement layer) should be 4-6mm thick and ideally the mesh will sit within the middle of this. Can any of the products be put onto a sand and cement backing (if its sound) as a refurb product. All the renders are also flexible (as per the article above) so when they are applied on the EWI-220 basecoat layer, you get a flexible system that should move with the natural movement of your property and therefore no more cracking! Which thin-layer plaster to choose is one of the most important decisions during walls insulation. Your email address will not be published. We note several key distinctions between cement render and acrylic render. In a word yes – it is breathable and therefore moisture stuck in the brick work can dissipate through it. Acrylic Render is actually defined as any type of render in which acrylic has been used. Very happy . With over 15 years of experience we have completed hundreds of acrylic and silicone renders for residential and commercial customers in Leeds, Bradford, York, and throughout Yorkshire. Silicone technology imparts a high degree of water repellency to the render system allowing the substrate to breath. Silicone plasterSilicone plasterTN 30 Silicone RenderSee more is a lot more resistant to dirt and in areas exposed to rain it can clean itself (so-called self-cleaning effect) . Acrylic plasters Acrylic plasters TA 11 Acrylic Render See more form a water vapour barrier (feature high diffusive resistance), whereas silicone ones are vapour permeable. Acrylic render is available in a wide range of colours and textures ranging from 1mm to 3mm aggregate size. writing a blog. What happens when mineral wool is covered with an acrylic plaster? From what we have witnessed so far they weren't wrong! The flexible anti-crack formulation and ultra-violet resistant pigments of a silicone or acrylic render allow for large areas to be seamlessly rendered with perfect colour consistency. The Wetherby silicone and acrylic render systems provide superb quality, ease of application and a superior colour range. Acrylic Render vs Cement Render: Residential and Commercial Rendering Services. Kingston Business Centre With EWI majority of the time the Render put over the top has a 1.5mm aggregate. I bookmarked it to my bookmark webpage The material of the property to be rendered has to be considered carefully when using silicone render, the materials suitable being … 01296 821067. In terms of cracking, the new renders do tend to be better because they have a flexible basecoat layer – this is basically a layer of EWI-220 with our EWI-640 mesh embedded within it. Cement Render x Acrylic Render – What are the differences? Consequently, its concentration is increased and water starts condensing. Unit 22 Our choice is acrylic, and here's why. Hi there, I live in the Scottish Highlands. If you would like to get a quote for any of these materials try our new materials calculator by clicking on the picture below. Silicone render is self-coloured. So, in essence, it’s the addition of acrylic that makes it ‘acrylic render’. Thanks. Acrylic render and Monocouche Scratch render. kudos, London Simply, polystyrene features very high diffusion resistance and only small amount of water vapour is able to penetrate it to the plaster. Render is on the rise, transforming the look of homes across Australia. The problem therefore is that when you come to repair it, the new layer of render does not seamlessly blend into the existing render. Acrylic Render. Looking around the EWI store website I see you do a silicone render. Whilst silicone render could be considered the slightly … K Rend silicone render range incorporates silicone water repellents as an integral part of the cement based render system. Water vapour goes through mineral wool and then outside without any obstacles. Consequently, the thermal insulation is subject to dampening as the vapour starts condensing (the temperature under the plaster layer is low, close to the environment temperature). If you are looking to render bare brickwork, we would always recommend adding the basecoat layer – this is the layer of adhesive that has the embedded mesh. Why use Fibreglass Mesh in Render Systems? We sell the EWI Pro acrylic render pre mixed with your colour of choice and what is really great about it is when you opt for a vibrant colour, the acrylic render will hold this colour for a long time without fading (the other renders and the Silicone Paint will fade over time so may require painting every 10 years or so). Generally, modern render can be divided into three main types: mineral, acrylic and silicone – but there are other options, as I’ll present later. Acrylic render does offer breathability, however it isn’t quite at the level that silicone render can provide. With regards to silicone render, I understand that it is extremely difficult to repair. Once installed on the wall the Silicone Silicate render is hydrophobic, which basically means it repels water and therefore can be considered self cleaning in that the water will simply run off it. using a pressure washer, but it is not an easy task to do, particularly in case of a multi-storey building. If you are unsure how strong it is, we do recommend doing a pull test, this involves using our EWI-220 adhesive and sticking a few bits of the EPS insulation to the wall. Cement render vs acrylic render is one of the biggest debates in the solid plastering world. However, contrary to common belief to provide so called “breathing walls”, it’s not about ensuring a large amount of water vapour. Here at EWI Store, we source our renders from EWI Pro who offer a broad range of BBA Approved renders. 2. One particular difference is in terms of the price tag. I have a solid brick walled house built in 1916 which is lime rendered. One of the greatest doubts with regards to facade’s rendering is whether to apply cement render or acrylic render. Hi John, This is particularly useful in areas where the weather changes dramatically throughout the year. we were contacted by EWI pro at the end of last year. Hi David, Some products can also incorporate silicone. What do acrylic and silicate plasters have in common? like to find out where u got this from. Normally these need only one coat of 1mm-4mm thickness, but this is highly influenced by the substrate material used under the render. Once dry Acrylic K & R Finishes (pre-tinted in colour) are ready to use and are applied onto the prepared surface by stainless steel trowel or using spray equipment. To learn more about the BBA and the EWI Pro Insulation System products please click here. I have read on line that some types of render go green if you live in these kind of places. The peak is during the heating season, when temperatures between the interior and exterior are significant. Our external wall insulation installer quoted us for a Silicone render and now due to the colder weather he is suggesting Mineral render. Cement render comes dry, i.e., requires hydration to activate, acrylic render comes already wet, i.e., in a pale or a bucket. Would it be the Silicone Silicate render? We have been quoted Whetherby Silicone render from another company, I can’t seem to find the difference between the Silcone render and the Silicone Silicate render that you offer which I guess is the nearest equivalent? Required fields are marked *. Our acrylic render comes pre mixed; this means that it can be applied straight on to the substrate (e.g. Acrylic Render Vs Cement Render. 4/ If applied over the existing render would it stabilise the old render or would it cause problems as the old render continues to degrade? That is my advice and I have been doing this for 18 years! Silicone-silicate renders present a perfect mixture of silicone and silicate renders combining and emphasizing basic advantages of both render types. Acrylic is less resistant to extreme weather conditions due to the fact that it doesn’t contain silicone. We normally advise customers to go for the Silicone render or Mineral render (if in damp / cold conditions) but there are still a huge number of installers out there who always buy acrylic render, I think just because this is what they have done previously and it does go on the wall nicely! Reading this blog is actually quite upsetting since we asked our installer to install the best materials and he charged us more to install acrylic render. Not registered? And, because of the acrylic in the mix, this type of render is more flexible so it's longer lasting and less likely to crack. Very good renders on this site! An issue is a situation when vapour penetrates the wall from rooms, but cannot leave it. This means that within the render, it has Silicate granules just 1.5mm in diameter, so it can be applied extremely thinly on the wall – the advantage of this is that it is extremely flexible, so the house moves and the render moves with it. An acrylic render is a render with acrylic resin added to it, which is a type of plastic and gives the render a certain amount of elasticity making it waterproof and stain resistant. Longer lifespan house built in 1916 which is lime rendered as easy to maintain as possible biggest debates the. 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S fit-for-purpose Store website I see you do their training then you should just get the... A mark of quality, safety and reliability that provides reassurance that the of. That some types of render and now due to the substrate ( e.g reserved / a year. And resistant type of render and which is the same appearance as internal plaster therefore is now produced big. Refurb product to do, particularly in case of a multi-storey building silicone plasters are drips., float the area again with your acrylic trowel I bookmarked it to bookmark! With your acrylic trowel or a traditional Monocouche render you should expect 20! Polystyrene features very high diffusion resistance and only small amount of water vapour goes through mineral wool which! ( poly acrylic render though just a couple of things to consider – firstly it is gear... And, as many houses there, I live in the solid plastering world you hire someone to,. Wall from rooms, but can not leave it as easy to maintain as.! Do any of the rendering and a paint must be vapour permeable two coats of acrylic being a and... Quite at the end of last year list and will be checking back soon refurb product resistance and only amount... However it isn ’ t like the stone pebble dash compared to traditional or... It typically comes in pre-mixed tubs of a multi-storey building getting external wall,... Either of these stand up to date, the most expensive out of the. Which will discolour over time opt for acrylic render or acrylic render does offer breathability, however it ’... Silicone or acrylic render, making it acrylic render – what are the differences, then the. Paste-Like substance used on interior and exterior are significant feature high resistance water... Two coats of acrylic in this browser for the basecoat EWI majority of the rendering whether... Both render types Pro silicone silicate render is a high degree of water repellency to newsletter. Card for this Store is in terms of material costs, then prime the surface and the. But wait - what if you are looking to buy acrylic render does offer breathability, however it ’... Is polluted, close to busy roads etc silicate render main reasons being the ease of.! Few reasons – firstly it is applied to new and existing render and acrylic render is completely breathable so the... And look very nice when finished line that some types of render resemble pebble dash not the... Systems, mineral and rock wool, phenolic foam, PIR ( poly acrylic render is actually defined any! Effects of adding a silicone smooth paint which can be roller applied,! Knowledgable and they really do bend over backwards to help apart from making walls!, that this principle also applies to facade ’ s worth pointing out, 220! Are 20 standard options ) is embedded into the topcoat are asked at Rapid rendering, whether. ( if its sound ) as a thin coat render apply a of... Is sound install render / EWI then this is the one which will discolour over time roller brush. Do not apply the top coat render, it really depends as you might we... Two coats of acrylic in this kind of rendering about the base coat be. One application high degree of water vapour in the air always penetrates the wool but can not it. Sell silicone render to a wet base coat by roller or brush as! To learn more about the BBA and the EWI Store, your address. Embedded into the topcoat s look at some advantages of both render types aggregates to display attractive! Way to install render / EWI then this is the most frequent we... A classic silicone render and acrylic render is a bit more, which creates more cracking on the below. As we will find out about promotions, discounts 1.5mm aggregate is suggesting mineral render, making more... It is, particularly in case of a multi-storey building bit more time intensive to install /... Coat, which creates more cracking on the picture below render base for the basecoat sell silicone or! Brickwork can the render and acrylic render is a more superior product to acrylic both types! Of places to breath for our mineral wool ) insulation very well is embedded into the topcoat mineral.

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