It now needs some repairs to the rendering and a new coat. 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). wall) without mixing it first with water. 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. Acrylic render vs cement render. Mineral Render vs. Silicone Silicate Render, Best way to install K1 Silicone K-Rend scratch render. If the EPS comes away in your hand then the underlying render is sound. It simply won’t crack!! The material of the property to be rendered has to be considered carefully when using silicone render, the materials suitable being … This ensures not only a flat surface on which to render, but also makes the system flexible so it can move as the building moves. avoid acrylic render. will last the longest. Can any of the products be put onto a sand and cement backing (if its sound) as a refurb product. Acrylic render does offer breathability, however it isn’t quite at the level that silicone render can provide. When render gets repaired, it normally requires patches to be applied, i.e. Can I please ask what is the four layer silicone render? Unit 1 Very happy . When used over a quality render you should expect a 20 year + lifespan. EWI STORE 2014 - 2020 All rights reserved /. It is apparently originally a German invention. 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. The price tag: The cost of acrylic render is usually greater than that of cement render for several reasons: 1. 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) . writing a blog. 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! e.g.40c 3/ would all of the old rendering have to be removed before it is re-rendered? The original coating would have been lime wash but I still am a little nervous about putting a resin type coating over lime render. It also requires painting afterwards, which means it is a bit more time intensive to install. Finally Acrylic render is not as resistant to the elements as our Silicone Silicate render, so there will be some maintenance required like cleaning over time. I think the older houses just tend to move a bit more, which creates more cracking on the renders. 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. Hi John, 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. and we want to make it as easy to maintain as possible. We are looking for a very fine render finish. diffusion resistance. Probably the biggest attraction of our silicone render is that the colour (there are 20 standard options) is embedded into the topcoat. Silicone Silicate Render Also known as a thin coat render system it can be applied directly onto masonry or EWI board systems by hand or machine. Can you get a warranty against cracking? An issue is a situation when vapour penetrates the wall from rooms, but cannot leave it. I would like to receive news and offers from EWI Store, Your email address will not be published. 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. The highest performing will be a Silicone … Acrylic Render is actually defined as any type of render in which acrylic has been used. 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. Acrylic Render is the most cost effective render when you consider the labour and material costs – requiring just one application. It is going to cause problems down the line as it bubbles when water tries to escape. an area of wall around the damaged area is taped off (ideally a square) then the damaged material is cut out. Thus, silicate plaster is a far better choice in areas where air is polluted, close to busy roads etc. As we will find out, the price does not determine the core difference between them. using a pressure washer, but it is not an easy task to do, particularly in case of a multi-storey building. A quick response would be appreciated. Your email address will not be published. 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? time I will be back to read a great deal more, Please do keep up the awesome work. check out my web site as well and tell me how you feel. Our external wall insulation installer quoted us for a Silicone render and now due to the colder weather he is suggesting Mineral render. I bookmarked it to my bookmark webpage 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. So why do people use it? Not registered? Silicone render is self-coloured. 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. Chessington I love your blog.. very nice colors & theme. EWI-220 – Basecoat Adhesive What do I need for rendering in the Winter? They are mineral, silicone and silicate plasters. Consequently, acrylic plasters are not suitable for mineral wool insulation, whereas silicone can be applied both on polystyrene and mineral wool. Teflon™ is a registered trademark of Chemours used under licence by FFiL Śnieżka SA, We use cookies to facilitate the use of our site If you do not want cookies to be saved on your disk, please change your browser settings Please read our, Acrylic vs. silicone plaster - get to know the core differences. If the extension is brickwork can the render go straight on to this? It’s a mark of quality, safety and reliability that provides reassurance that the product’s fit-for-purpose. They all can, but start at the basecoat layer, so use EWI-220 + embed the mesh first. K Rend Alkali Resistant Reinforcement Mesh. Vicrender work with different types of clients. 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. So in terms of comparing it to acrylic render, you’ll probably need to clean acrylic more regularly than Silicone. Consequently, its concentration is increased and water starts condensing. Acrylic plasters are not intended as a finishing layer for thin-layer walls of aerated concrete … a reinforced adhesive layer, thin-layer plaster and a paint must be vapour permeable. Can this be put on in the winter months? The applied finish is then rubbed-up and textured with a plastic float to the grain size. We live in a woody area. Is there a render that is the same appearance as internal plaster? Sign Up! For a 1.5mm render this will end up between 1.5mm and 2.0mm thick. 1m x 50m Fiberglass Reinforcing Mesh used for external wall insulation systems, mineral, acrylic, silicone and silicate renders. One of the greatest doubts with regards to facade’s rendering is whether to apply cement render or acrylic render. Once they do get soiled and tired they can be freshened up by painting with a silicone smooth paint which can be roller applied. Silicone’s complex structure (making it more expensive) it is a more superior product to acrylic. Therefore, in non-standard and more difficult situations, an expert should carry out thermal and moisture calculations for walls before and after insulation performance. To find EWI Pro installers click on the following link: http://ewipro.com/installers-directory/. Well there are a few reasons – firstly it is cheap in terms of material costs. Acrylic render is widely used and therefore is now produced by big manufacturers including Rockote, Unitex and Dulux Acratex. The Acrylic Resin / plastic in this render means that nothing is going to get through it, therefore it is definitely not worth putting it on a breathable insulation product like our Rockwool or Wood Fibre as it sort of defeats the point! With EWI majority of the time the Render put over the top has a 1.5mm aggregate. I don’t have time to browse it all at the moment but I have bookmarked it and also added your RSS feeds, so when I have Photo by Parex. Hey there I am so happy I found your blog, I really found you Thanks in advance for your help. Some of them prefer cement rendering services to have a traditional look on their walls, whereas some prefer acrylic rendering services to give trendy look to their properties. Silicone render. am here now and would just like to say kudos for a fantastic post and a all round thrilling blog (I also love the theme/design), Unit 22 Acrylic Render vs Cement Render: Residential and Commercial Rendering Services. 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. Water vapour goes through mineral wool and then outside without any obstacles. 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? Acrylic renders are consisted of acrylic being a flexible and resistant type of plastic. Used the silicone render and it is good gear. Acrylic Render. After looking into a few of the articles on your website, I truly appreciate your technique of It is a high tensile strength mesh coated with acrylic acid copolymer liquid, and is water, alkali resistant. Did you design this website yourself or did you hire someone to do it for you? Do any of these different types of render resemble pebble dash. Once this has been done, let it go off, then prime the surface and apply the top coat render. 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. 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