Roughcast render thickness

It is an ideal substrate for directly applied render finishes and can be used for exterior walls in ventilated systems,exterior ceilings and soffits. Roughcast produces a softer finish which is often painted. There are 20 standard colours for the scraped texture range. Two coat work is suitable for renders with an overall thickness of approx. M20 Plastered/ Rendered/ Roughcast coating (continued) M20 SPECIFICATION 1954 St Mary’s CE High School BLOCK 14 Lyster Grillet & Harding Ltd Architects M20 Page 4 of 8 - Soundness: Free from loose areas and significant cracks and gaps. render; thus the amount of dirt adhering to the surface is Apply 6 - 10mm thick, depending on the size of the dashing. A roughcast (wet dash) finish can be achieved by throwing on the final coat of  Sto is a manufacturer and distributor of external wall insulation, rainscreen cladding and render systems, acoustic systems and coatings. treatment may be recommended. It is mixed  Such a render is thicker in the hollows and very thin over the stone faces. The top coat, applied a day or two after the scratch coat has set and cured, would be a mix of 5 plastering sand, 1 of cement and 1 of lime (5-1-1). The following guide applies equally to both NHL and Lime Putty renders, and On any surface one should be looking to apply a uniform thickness of lime  ROLLERCOAT is manufactured at our own factory to an exact specification and . Call and order at 0333 577 8811. render 150mm min. Updated: September 2013. This is a cement based While the render is still plastic, throw washed aggregate onto the surface to give a uniform dense coverage. Second or final coat : The second coat or 'finishing coat' of roughcast is usually the same thickness as the base coat, although the mix ratio is slightly weaker than that of the base coat (approximately a third more sand added to the mix). spacing 1m) render Weepholes min. External solid wall insulation and damp External wall insulation is a great way to protect against penetrating damp, creating a new weatherproof layer on the outside of the building, and slowing the movement of heat through the walls. -Apply the roughcast render PC ®78 with a stainless steel trowel, grading 0. The reinforcement is either mineral fibre or glass mesh. Regardless of texture chosen it is imperative that the combined final thickness of the render, at its lowest point, relates to the exposure rating. Required: 12 - 15kg water vapour to pass freely through the render; thus the. M20 PLASTERED/RENDERED/ROUGHCAST COATINGS 110 RENDER: KEIM NHL KALKPUTZ A dry bagged lime render manufactured to DIN EN 998-1, based on sand, lime (white lime, highly hydraulic natural lime) and hydraulic additives, with additives for improved processing and adherence. Thickness, resistance and elasticity are key features of the best masonry paint for render, but long-term protection and low maintenance are also important characteristics. The dubbing render is supplied as a dry, pre-mixed polymer and fibre reinforced powder and is approved for use in a number of our BBA certified systems. • Apply Baumit Lime Render Finish RK 70N as a topcoat 2-3mm thick sponge or float finish. Immediately tamp the aggregate particles lightly into the butter coat with a plastic float, ensuring a good bond is obtained. aka 'Light-weight render' Hydraulic lime renders. Lime plaster might be shrink after drying so animal hair of about 5 Kg is used for 1 m 2 to avoid lime plaster cracking and K-Rend Roughcast may be used as an alternative to dry dash, providing an attractive, through-coloured render finish. K Rend Silicone Roughcast is a self coloured and water repellent, wet dash finish render system which is thrown onto a K Rend silicone dash receiver. Internal Background: • See Baumit Plaster and Finishes - Application Sheet 7. Tyrolean rendering is a cement based render containing silicone which gives the render its waterproof properties. insulation; rendering the wall (reference should also be made to Clause D15). how many coats of what thickness do they propose? and  Available in 48 standard colours (special colours to order), the render range of styles from medium scraped, light tyrolean to heavy roughcast textured finishes. your second coat is your floating coat and is applied upto 15mm thick this also Wetherby Building Systems Limited are UK market leaders in the manufacture and distribution of a wide range of insulated render systems, brick slips, brick effect renders, polymer cement renders, silicone & mineral renders. Render thickness seems to be between 5 and 10 mm He rendered approx two square mtres at a time before applying dash. Of course, these are not the cases that receive publicity. Tartaruga Roughcast is ready mixed coating composed of K Rend Roughcast is an attractive alternative to dry dash, providing a through coloured render silicone finish with excellent water resistant qualities. They were just flicked on and stuck not pressed in. Richard Williams Builder’s Merchants in North Wales are the main K Rend suppliers for the region and know just how popular K Rend has become. Changes in colour or thickness can be employed to produce raised features such as bands, plinths and stones. Find out how to render walls in our easy to follow guide by DIY and renovation expert Michael Holmes Apply a butter coat of render to a uniform thickness depending on the aggregate size (typically 8mm). Painting render is not as simple as it seems. shortened coal shovel (to apply rough cast finish) pump action garden wet the area and apply the first coat of render to a thickness of just under half an inch  Premixed, one-coat render. How to Apply a Three Coat Lime Render A guide by Cornish Lime, using NHL or Lime Putty There are a number of different substrates you could be working with, from a simple masonry wall to a timber lath substrate, and we have tried to keep the following guide as generic as possible. on surfaces that provide adequate suction and a good key. Pebbledash is formed when the stone is pressed into the wet render, whereas roughcast involves the stone being mixed into the mortar before it is applied. Exterior Finishing Options Stucco is a very traditional cladding system incorporating a sand-cement plaster applied over metal lath reinforcing on rigid or non-rigid backing material. Wet Dash: Also known as roughcast. 5mm thick (or slightly thicker on old  What is roughcast and how does it differ from pebble dashing? English Heritage (2011) Mortars, Plasters and Renders, Practical Building Conservation,   K REND ROUGHCAST is a cement based, polymer modified, self-coloured render, requiring only the addition of water Coverage: 1. It is Weberpral M is a through-coloured external render which offers a weather resistant,low maintenance and highly durable finish. It is also easy to match to an existing façade, Georgian for example, a flexibility that is appreciated by designers. K-Rend Base Coat is first applied to the block-work, then a receiving coat of Dash Receiver. Below is a round up of the most common house rendering options. How to apply tyrolean with a manual coating sprayer : Shop for Manual Coating Sprayers : Preparation is the key to success. Applying the render. The job requires a specific exterior masonry paint capable to act as a shield, preventing water infiltration in the wall. If a scraped finish is required, the render can be textured by scraping or rubbing it with an old saw blade or a wooden float, covered with expanded metal. Click and Collect in 1 hour or enjoy free UK delivery on orders over £50 excl. 5 – 4. The StoStucco lath with perforations in the chip paper allow an optimal key of the lightweight mineral basecoat to sit around the stainless steel wires, providing a solid render base. Is there a recommended minimum thickness for external render, including scratch coat and top coat with roughcast. Various degrees of textures can be achieved from a Tyrolean fine finish through to a heavy roughcast effect. 5mm Knauf Aquapanel Exterior Cement Board provides a solid, dry base that can withstand the extreme weathering effects of wind, rain and snow. The average thickness of rendering and floating coat may be 10-15 mm and 6-9 mm 12. Immediately tamp the aggregate particles lightly into the butter coat with a plastic float, ensuring a good bond. Acrylic render's advantages are that it is has a high level of elasticity combined with weather resistance and breathability. Make sure the colour needs to be uniform when the mixing is complete. The estimate is based on general, practical render usage. Render weber. . Brick Effect. Many houses have a rendered plinth along the foot of the walls to. the finished render using specialist tools. All products in the Quick Render range must be overcoated within 28 days of application. It is used as a decorative coating for walls and ceilings, and as a sculptural and artistic material in architecture. The surface of the render is removed by the action of the scratching tool, and approximately 2 to 3 millimetres of render are removed exposing the open matrix of the aggregate mix. Roughcast and dry dash finishes that require a strong mix are not  Parry & Jones Plastering | Monocouche Renders Chester | Call (01492) 518 617 | pigments are added and controlled throughout the thickness of the render. K-Rend Roughcast may be used as an alternative to dry dash, providing an attractive, Roughcast require: 12-15kg / sq m approx for 6-9 mm thickness. Not only this mixture is used for under coat but also used as finish coat. We explicitly reserve the right to change the technical specifications. Any better suggestions. selection of render types, construction procedures the correct thickness in the appropriate number of . The render coat is applied about 10 mm thick using a mix of 1 part  with stone dashed render coat. Hello everyone this is how i patch up pebble dash / dry dash / roughcast render this demo is part 1 part 2 will follow soon on the two ways I do my dry dashing. StoStucco is a BRANZ appraised render system based on the traditional New Zealand stucco net system. Mix enough render for at least 4o minutes of work. How to render walls: a beginner's guide to rendering Refresh your home's exterior with a coat of render. XM60. Sep 24, 2013 Roughcast needs a first coat of 1 part cement : ½ part lime : 4 ½ parts . It was an essential element of the Arts & Crafts movement and played a large role in Edwardian house design — so if you have a house with original pebbledash, embrace it. Cement render is usually mixed on site before being applied in two or three coats. Historic It is not intended as a comprehensive guide or specification. Preparation, Brick, Render, Blockwork, Pebbledash, Tyrolean, Concrete . 6 for further information. Silicone Render Applied Direct Onto BluClad Similarly a range of thin and thick coat render finishes are available. All walls were PVAed before rendering. This is one of the more traditional pebble dash type finished used in the UK; Tyrolean Render: Tyrolean render is applied using a Tyrolean Gun to build up several layers. The exterior wall surface is formed when an array of pebbles are literally thrown at wet render, creating the pebble-strewn walls we are all so familiar with today. The Dash Receiver and the Roughcast must be the same colour. The Render Mender has up to date knowledge of the latest technology in the wet trade. The result is a wall What is wrong with monolithic claddings? The simple answer is: when they are used in low risk designs and done well, there may not necessarily be anything wrong. While the render is still plastic, throw washed aggregate onto the surface to give a uniform dense coverage. Learn How To Repair Render with. all external work is sand and cement render and is a two coat process the frirst coat applied is called a scratch coat and is about 9. and a Parex specification being issued, a minimum 15mm finished thickness of   Normally applied as an excellent background for any dry dash or roughcast finish for new build or refurbishment. K REND Silicone Roughcast Colour Options. Rendering is popular because of its durability and its uniquely textured appearance, however, it is not immune to damage and can crack quite easily if, for example, the house foundation sinks unevenly or new framing members shift and shrink as they dry out. The second pass gives the textured finish to the desired effect. A leveling scratch coat of render must be applied to the wall prior to dashing. Special colours are also available from a customisable pallet, upon request from our Technical Support Centre. Recommendations for the contractor-The build up and tolerances of the substrate must be in accordance with relevant standards and guidelines. Dampening 9of the surface prevents the lime wash from drying out to quickly. render. 5mm thick maybe more on old uneven walls it has a waterproof addative in the mix. g. 4. Wait for a few days of good weather so the new roughcast can dry properly. Its usage requires the application of a bonding spatterdash (rough cast). Wet the wall and the put on the scratch coat. Sto is a manufacturer and distributor of external wall insulation, rainscreen cladding and render systems, acoustic systems and coatings. Estimate lime render quantity for traditional rendering. As a guide for thickness you can nail wooden battens of the correct thickness vertically to the wall which also gives you a clean edge to work to. StoStucco Render System. Roughcast render: A traditional finish in Scotland, it is a cement-based,   Jul 9, 2009 Hello, Ive been speaking to a few tradesmen about rendering the front corners etc. straight edge (1m long) 4mm maximum ± 3mm maximum deviation in any one storey deviation Render (h) vertical and horizontal flatness ±8mm maximum vertical and horizontal deviation from flatness in 5m (excluding features). Sorry for the quality (camera All too often we see the wrong type of rendering materials used when rendering walls and buildings. Lime mixture consists of sand and line that are mixed by 1 sand to 3 of lime by volume. for any dry dash or roughcast finish. Applied at a maximum thickness of 3 cm per coat. Roughcast or pebbledash is a coarse plaster surface used on outside walls that consists of lime and sometimes cement mixed with sand, small gravel, and often pebbles or shells. It is a traditional render which incorporates an aggregate of small evenly sized pebbles into the mix. In addition to insulating and weatherproofing, the whole look of the house can be considerably improved. Finish of the surface with a synthetic disc to desired texture. The render should be soft putty-like state and should stick to the float when you turn it up-side down. Like other forms of lime render, harling provides both a weather protective and decorative coating, commonly covering what was perceived to be poor quality rubble stone or brickwork. 12. It's pretty much the same job but done outside or externally. Stucco or render is a construction material made of aggregates, a binder, and water. It is for use on all mineral substrates, both exterior and interior and has excellent flexibility and high moisture vapour permeability. Some K Rend Silicone Roughcast is a self coloured and water repellent, wet dash finish render system which is thrown onto a K Rend silicone dash receiver. The total system is either two or three coats, and it is finished with a weathertight applied exterior acrylic coating system. n Ensure the product is mixed correctly with the correct water content and do not allow the render to cure or by reducing the thickness of the later coat. 11. SELECT TARTARUGA ROUGHCAST Product Description Tartaruga Roughcast is a synthetic render-cum-finish which can be applied straight to most fairface surface such as concrete, plaster, brick work both exterior and interior. When fully cured, Alumasc Facades by K Rend Dubbing Render will form a weather-tight, breathable and flexible reinforced base coat render. 5kg per mm thick per sq m. thickness and high surface area of roughcast Guide To Repairing Damaged Rendering. This can be with a coloured render, which saves on repainting, or sand and cement render, which will need painting once it’s on the house. Instructions for use . Alternatively, the render can be finished as a traditional roughcast spray finish which is particularly effective in areas of high exposure. Do not apply the render till you’ve reached the desired thickness while using a leveler to smooth it over. There is no set thickness for the overall render, but the two coats combined would be around 15mm give or take the odd ml. walls, inner and outer leaves of 3" thickness separated by a 2" cavity, reinforcement in both rough cast rendered externally. Sto is a leading supplier of facade insulation systems & manufacturer of high-quality exterior & interior plaster systems  Apply a butter coat of render to a uniform thickness K REND ROUGHCAST Silicone Roughcast the render should be scraped the day after application. They help by acting like a sponge, absorbing rainfall then allowing it to evaporate rather than soak into the wall. In Ireland it is known as wet dash. smooth or light textured finishes, 7-8mm for coarse finishes (tyrolean, roughcast etc). If your property is brick and unpainted, changing its colour with render will  incorporate the required thickness of insulation to meet the . As with smooth render once the roughcast has completely dried it can be lightly sprayed with water and then lime washed. Chop old render off - If you have existing render on your property there will be an additional cost for labour as well as removal of rubbish that occurs. The mix is thrown onto the wall with close attention to achieving a wide even spread and obtaining uniform texture. Modern Portland cement is sometimes, inadvisably and inappropriately, used to render old external walls. but a common finish for many houses and cottages was a rough-cast where the final  There are various methods available such as brickwork, concrete render, stone cladding Best applied by throwing with a hand scoop to a thickness of approx. Further proposals and solutions are available any time from our technical consultants. Parex for additional guidance as the render thickness may need to be increased and additional surface Re-useable wrapped pallet of 1200 kg. Phenolic insulation is manufactured by a process in which a plastic foam forms an insulating core between two flexible tissue faced layers. All full colour illustrations shown online are as accurate as the screen will allow. Sprayplaster has been applied on millions of square metres of walls and ceilings around the globe every year. Render Systems Housing, Commercial, Hospitals, Schools. Finally, I was not able to Limit the extent of cracks in the wall roughcast, which is finally cracking: I have removed the crumbling parts, and protected the wall. rough cast The final coat is thrown and flicked onto the   Rough cast is a lime-based render and should never be replaced by pebbledash. K REND ROUGHCAST - Silicone Roughcast Roughcast render PC Coverage ~ 3. System includes: A range of polymer modified basecoats for use as a backing for the K Rend silicone dash receiver and a range of K Rend silicone dash receivers. The above illustrations are for Multicoat render systems from the NBS section Render and roughcast coating systems. It differs slightly from roughcast render, which we could call its cousin. Plaster is coating a surface with cement render or plaster finish on an internal or that it is properly applied to the correct thickness in the appropriate number of coats Roughcast Finish - Throwing and flicking the final coat onto the surface  House insulated or insulation render systems usually come in the form of proprietary Greater thickness of insulation is required compared with what is usually . Dundee University - weber. If the render is too wet, do not use it - discard and start again. Rendering Exterior Walls – How to Render an Outside Wall Including Getting the Right Mix and Correctly Applying and Finishing the Render. House Render Ideas. St Astier Natural Hydraulic Limes (NHL) Two coat work. Lime renders were traditionally applied to give protection to walls built of poor quality rubble stone or porous brick or to walls in exposed locations facing driving winds. This is indicative of the LOD requirements for Render and roughcast coating systems. Can I use any kind of 6-10mm chips for the rough cast coat or do they have to be lime chips? What proportion of chips should I use in the mix? Do I need waterproofer in the roughcast coat? M20 PLASTERED/RENDERED/ROUGHCAST COATINGS 110 RENDER: KEIM UNIVERSAL RENDER A hydrated lime based renovation and thin layer exterior wall render with fibre reinforcement. 5 kg/m², dependent on the thickness of the insulation: - Apply the cold adhesive PC ® 56 with a notched trowel (tooth To provide a protective rendering and decorative finish to most types of brickwork and concrete blocks where there is adequate key, a render coat can be followed by the Tyrolean finish. But first, we have to define exactly what pebbledash is. therm. Stucco is applied wet and hardens to a very dense solid. Reference line Equal K Rend not only offers a high quality, durable finish with great natural looking results it also gives a wide choice of textured finishes to choose from. There is a least one lime-based insulated render system provided by collaboration between Unilit and Foamglas. Whilst the surface is still green, throw roughcast onto the surface. 5:1 = 14 kg/m² or repeat the first scat coat for a rough cast finish. In theory, there are no physical limits to the thickness of insulation to be put externally, other than the roof overhang. If it is picked for this reason, it is very important that no acrylic render is used to finish the but obviously the thicker the material, the better its insulating performance. Priming walls - Some walls may require a special primer to help the render to adhere to the wall, the additional cost can be between £1-3 per square metre. (MFS/MFD). The Quick Render range is an ideal cement base coat for ROCKCOTE Acrylic Textures, Coloured Renders and membrane paints. K Rend Renders Where the finished roughcast appears too coarse then a wetter, finer mix can be applied to fill up between protruding lumps. A+ green guid rated; One-coat for fast application and short programme periods; Through-coloured for low maintenance-decoration not required The topcoat is applied to a thickness of about 6mm and finished level. The application of the roughcast is often used empirically to increase adhesion, however, there are few studies to support this practice. South of the border it is known as roughcast and is widely found in vernacular architecture. VAT. design, preparation and application of external renderings and internal plastering must be followed at all times. Before it is dry, it can be rubbed up with a wooden or plastic float, to roughen the surface slightly. Talk about the thickness of Two and Three Coat Work - Natural Hydraulic Lime (NHL) Renders. A single coat render applied applied in two passes means fast application with shorter programme periods, reduced scaffolding and site costs, as well as earlier completion of ground works. • Or apply Baumit Coloured Render Topcoat KRP 10mm and scratch back to 8mm • Or apply Baumit Decorative Roughcast Finish SEP with steel trowel to 2-3mm thickness. Applying the render As a guide for thickness you can nail wooden battens of the correct thickness vertically to the wall which also gives you a clean edge to work to. • Apply a butter coat of render to a uniform thickness, depending on the aggregate size. All our render systems and products are supplied ready to use and have a long-lasting and durable appearance while adding comfort and style and creativity to every facade. Beading is used for when you are applying plaster to a wall around corners especially around window frames. Roughcast or pebbledash is a coarse plaster surface used on outside walls that consists of lime and sometimes cement mixed with sand, small gravel, and often   A traditional through-colour render which incorporates an aggregate of small one coat of WBS Polymer Dashing Mortar to a minimum thickness of 4-6 mm in  Nov 3, 2014 Pebbledash and roughcast are forms of render where the top coat is The first ' scratch' coat is around 9. 5. How Do You Apply Roughcast? To apply roughcast to an exterior wall, clean and repair the base render if necessary, apply an undercoat and then add the topcoat with the roughcast mix. The wet dash mix is delivered premixed and soured, ready to mix with the cement on site. Cement. It is suitable for machine or hand application onto brick or block walls. Hi pro's Just asking what you guys would mix your wet dash at. A practical guide to rendering and plastering with lime. 4 Pebbled dash plaster: It is similar to rough cast finish except clean  Horizontal chases should be limited to one-sixth the thickness of a single leaf, and vertical . Talk about the thickness of coat for the type Roughcast Base coat 8-10mm Dash receiver nominal 6mm Roughcast APPLICATION INSTRUCTIONS & HEALTH AND SAFETY INFORMATION Base coat 8-10mm Dash receiver 8mm Dry Dash Dash Receiver The BS EN 13914-1. With over twenty years experience covering all disciplines of solid plastering, cement rendering, acrylic rendering, natural & decorative finishes. Over time, it has a tendency to crack. What are Pebbledash and Roughcast? Despite the fact that it carries some negative connotations, there is another side to pebbledash render. 5kg per mm thick (10-15kg/m2 approximately). The Kitemark® is the world's premier symbol of trust, illustrating our commitment to providing you with the highest standard of quality products and service. This calculator will tell you how the total thickness of base coats and the thickness of the render finish  Authorized partner of Sto for Australasia. Detailing at openings sealant This is a coloured cementitious render scratched while the surface is still workable, but after the initial setting has taken place. Coloured monocouche render which can achieve a scraped or roughcast finish – suitable for most types of brick or blockwork. With the dramatic increase in recent years in the use of pre-bagged factory batched mineral and synthetic renders, we are very proud to be the Premium K-Rend Distributor in Scotland, the sole Distributor in Scotland for JUB Render Systems, and the exclusive UK Distributor for Scotrend Renders. The difference between the two lies in the way they are applied. As it gets drier scratch some horizontal lines in it. How to render a wall, particularly how to render exterior walls follows a very similar process to that of plastering internal walls. . The materials are mixed into a slurry and are then thrown at the working surface with a trowel or scoop. Phenolic Insulation Board. Plaster beads allow for neat, sharp corners to be plastered with ease. Sprayplaster is a range of ready-mixed and polymer modified cementitious, spray applied plasters. Let it dry out. The render should be soft putty-like state and should stick to the ˜oat when you turn it up-side down. You use a wire scratcher to form a key in this while its wet to form a good key for your second coat. Spray roughcast or Scraped texture. This calculator will estimate the amount of render in kilograms for traditional lime rendering. Thickness is 6-10mm and coverage is 1. Here is an example below, of a failed polymer render, applied only 18months ago! This polymer render was applied to a stone building, built with lime mortar. Soffit insulation with roughcast finish FOAMGLAS® slabs with cold adhesive PC® 56 Solutions for technical details and specification clauses on request. I was thinking of miximg it at 4 stones: 2 sand: 1 cement and half of lime. rend MT Roughcast, by definition is a more roughly applied, lumpier render mix, made up of large stony aggregates, can more suitably be applied to ragged edges of existing render as the joint between new and old work is more readily disguised. Quick Render Product Guide anyone into roughcast, this is one thing I never do but have been asked and ideally want to just spray a heavy finish from the pump onto the walls but just in case they insist I may well look a subbing it out, they are interested in a finish up the road from them, looks like 20 - 25mm casting stones - rounded pebbles not chippings and an all over colour of white off. The end result needs to be soft but not too wet because it will just slide off the wall. Make sure the surface is dust free and sound, if it’s not mix up a bucket of water and a cup of pva and a few trowels full of cement, stir it to make a “gravy” and brush it all over with an old soft broom “ gives good reach” but make sure you cover the ground but don’t bother with sheets just weberpral Monocouche Render Materials in this guide: weberpral weberend aid weber CL150 weber standard mesh cloth weber accelerateur monocouche weberend bead adhesive Application Guide This Application Guide should be read entirely, as it contains important information on the installation and application, of the Concrete Repair products listed. Facade solutions to meet the Architectural style and finishes required by designers. Note: The exposure zone will influence the render's thickness, required number of coats, and mix. A technical I use 3 parts plastering sand 1 part building sand 1 part cement and trowel full of lime. - Cutting, chasing, making good, fixing of conduits and services outlets and the like: Completed. The K Rend Roughcast range has achieved the prestigious Kitemark license to BS EN 998:2003. textured roughcast render, commonly refer to a wet dashing. To physically textured surfaces in which roughcast. Plain Quoins (440mm x 215mm) Plain Quoins are either 100mm thick for facing brick or masonry applications, 120mm thick for render or roughcast applications or where a projection from the finished brickwork is required, or 140mm thick for use with our 140mm thick ashlar blocks. coastal, suburban and rural environments. Properties with Silicone Render. 15 mm. It has a high closed cell content and fine cell structure. Without it you could end up with all your future efforts wasted and back to square one minus a lot of money. Types of Plaster based on Material Used Lime Plaster . Depending on exposure conditions of the building Hampstead Garden Suburb Trust Technical Guide ROUGHCAST 2 Pebbledash Pebble dashing (dry dash) was introduced in the early part of the 20th Century and differs from roughcast in that washed small stones, shingle or crushed stone were left out of the mix, and thrown onto a cement render, with no lime, while it was still wet. Enough bags of pebbles were mixed together for the whole job before starting but wern`t washed. flat scraped, machine applied, spray roughcast finish which can also include  Nov 9, 2016 The first layer (aka the render layer) was about 8mm (3/8 inch) thick and was forced through the gaps between the laths to achieve a strong  On blockwork, beads are set onto render dabs to the required depth and plumbed Through-colour render is applied 2-3mm thicker than the required finish. Render Calculator. Find out how to fix and maintain roughcast Pebble dashing is a type of wall covering typically used on exterior walls. Terraco offers two main types of renders: Sprayplaster. It is a finish used on masonry or concrete wall surfaces, suitable in an environment where there water is nearby and/ or high humidity e. optional render 40mm overhang plywood plate metal coping weep holes (max. The guy doing the work on my house must have painted it on! Roughcast render is the layer of cement used to protect foundation walls. Rigid phenolic insulation is produced by mixing high solids and phenolic resin with a surface acting agent. 5 –3 mm, coverage dependent on grading. A professional builder will REMOVE all the old pebbledash and render over the bare bricks, however, a COWBOY builder, will apply render OVER THE TOP of the old pebbledash, which is a disaster waiting to The render should be in a soft putty-like state and should stick to the float when you turn it up-side down. WBS Roughcast (also referred to as Wet Dash) is a cementitious product incorporating silicone technology to produce an attractive through-colour render with excellent water resistant properties. The render coat is applied about 10 mm thick using a mix of 1 part cement : 1 part lime : 6 parts clean sharp sand. It consists of two coats of a lime and sand "base" into which pebbles are thrown and pressed. Discover our range of rendering materials, including render mix and white render. SUITABLE FOR n Machine or manual applications. These are long-life products with guaranteed performance. Whether the beads are placed on a dry wall plasterboard or onto an existing base that has been plastered, the beading gives a uniform thickness to the plaster. Hello everyone this is how i patch up pebble dash / dry dash / roughcast render this demo is part 2 part 1 will be in the description box bellow. It is available in a wide range of colours and is normally applied onto K Rend Basecoats. xK Rend Silicone Roughcast: A silicone enhanced, cement based and polymer modified, self-coloured render coating. A consistent approach to finishes 2011 (g) straightness of external reveals 4mm maximum deviation. The base coats (or scratch coats) are scored when they are still wet to give a key for the next layer. 10mm thickness maximum. See Standards Chapter Clause 6. The chipping’s or spar are mixed into the final coat of the mortar which is then cast or sprayed on to the wall. two weep holes per opening render stopped against corner bead render returned and sealed at the window head Note: weepholes are not required where render is not returned at the window head. • Immediately tamp the aggregate particles lightly into the butter coat with a wood float and ensure a good bond is obtained. This is the standard or traditional render used on external walls. (Commonly, the finish coat which is the roughcast mix, is the third coat when roughcasting). Textured Finishes Roughcast finishes- known also as wet dash- are the most popular of the textured finishes and provide excellent weather protection. The following is an example of a rendering specification that could be suitable for mortar at 2. roughcast render thickness

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