Pontypridd, South Walesinfo@lewzpropertydevelopment.co.uk Mon–Sat 7:00 – 18:00Company No. 15585929 About Services Service Areas Our Work Reviews Contact 07576 546805Request Estimate - Home - Services - Silicone Render Silicone Render · Pontypridd & South Wales # Silicone Render.Self-Cleaning,Through-Coloured, 25-Year. Full silicone and silicone-silicate render systems across Pontypridd, Cardiff and South Wales — coloured through, self-cleaning, breathable. Specified properly for Welsh weather, installed to manufacturer system spec. Request Free Estimate 07576 546805 30+ Years Combined Trade Experience · Fixed Written Quotes · Same-Week Surveys Silicone & silicone-silicate systems EWI integration 25-year manufacturer-warranted systems Fully insured — £1m PL · £10m EL Service Overview ## Silicone Render —The Brief, In Plain English. ### What It Is Silicone render is a modern external wall finish — a multi-coat system with base coat, embedded fibreglass mesh, primer and a silicone or silicone-silicate top coat. Coloured through, self-cleaning, breathable, crack-resistant. Designed to last decades without painting. ### Who It's For Homeowners replacing tired sand-and-cement render or pebbledash; self-builders specifying external render on a new shell; clients wanting to upgrade thermal performance with EWI (External Wall Insulation); landlords tired of repainting elevations every 5 years. ### When You Need It Render goes on once the building shell has fully dried and the substrate (brick, block, EWI board) is sound and prepped. Temperatures need to be above 5°C and dry during application and initial curing. ### Why It Matters Bad render delaminates, cracks and stains within years. The cost difference between a paint-finish render and a properly-specified silicone system is small. The cost difference 10 years later — when you're repainting the paint-finish one — is huge. What Happens If You Wait ## The Cost OfDoing Nothing. External render takes the worst of the weather. When it fails, water gets behind it and the damage runs into the wall. ### Risks Of Ignoring It - →Sand-and-cement render cracking, water ingress behind the render, internal damp. - →Painted-on render colour fading and chalking, full repaint every 5 years. - →Wrong mesh or wrong bead — corner cracking, edge damage, expensive repairs. - →No movement detailing at junctions — straight-line cracks across the elevation. - →Render onto damp substrate to hit a programme date — bond fails, sheets blow off. ### Common Mistakes Customers Make - ×Using a paint-finish render system to save £2k — losing £15k repainting it. - ×Skipping the basecoat mesh to save material cost. - ×Rendering onto a substrate that hasn't dried out properly. - ×Picking a colour without seeing it as a sample panel on the actual elevation. Our Process ## First Call ToFinal Sign-Off. 01 ### Survey & Spec Check substrate, moisture content, existing finishes and exposure rating. Confirm system spec — base coat, mesh, primer, top coat, colour. 02 ### Fixed Quote Itemised quote by m² of wall, with system manufacturer and product spec named — you know exactly what's going on the building. 03 ### Prep Mechanical clean, repairs and primer for external. EWI board fixed where specified. The prep determines the lifespan of the system. 04 ### Apply System Base coat with embedded fibreglass mesh, primer, then silicone or silicone-silicate top coat in the agreed colour. Each coat to the correct thickness and curing window. 05 ### Inspect & Hand Over Checked at distance for uniformity, touch-ups same day. System paperwork and manufacturer warranty pack handed over. Why It's Worth It ## What YouActually Get. ### Self-Cleaning Top Coat Silicone top coats shed dirt and water — rain washes the wall instead of streaking it. ### Coloured Through Silicone render is pigmented through the top coat. Chips and scuffs don't show a white scar. ### Breathable Build-Ups Walls dry outward instead of trapping moisture — important on solid-wall properties and EWI installations. ### Built For Welsh Weather System spec matched to actual exposure rating — coastal, valley or upland. Detailing tight enough to handle wind-driven rain. ### 25-Year System Performance Specified silicone systems carry 25-year manufacturer warranties — paperwork on file for future sale. In Detail ## Silicone Render —Every Variation Covered. Materials, methods and the situations each variation applies to — so you know what you're buying before you buy it. Working across Pontypridd · Rhondda · Ynysybwl & Abercynon · Talbot Green · Aberdare · Merthyr Tydfil · Caerphilly Full Service Area Map ### Full Silicone Render Systems Base coat with embedded fibreglass mesh, primer, then silicone or silicone-silicate top coat in any colour. Self-cleaning, breathable, crack-resistant. 25-year typical system life. ### EWI (External Wall Insulation) Insulation boards mechanically fixed and bonded to the existing wall, then a full render system over the top. Transforms solid-wall property thermal performance and gives you a brand-new external finish in one job. ### Render Replacement Hack-off failing sand-and-cement render or pebbledash, prep the substrate, apply a full silicone render system in its place. The right route when the existing render is past patching. ### Render Repair & Recoat Cut out blown sand-and-cement, patch, mesh and apply a new silicone top coat over sound existing render. Cheaper than a full strip-and-replace where the substrate is salvageable. ### Detailing & Finishes Bell-cast beads, drip details over openings, movement joints, weatherings, sills and copings — the boring details that decide whether the finish stays clean or stains within a year. Questions ## StraightAnswers. Cost, timeline, guarantees, lifespan, emergency availability — the questions everyone asks, answered before you call. Ask Yours ### How much does silicone render cost per square metre? +Roughly indicative: a recoat onto sound substrate is significantly cheaper than a full EWI system with insulation boards. We quote per m² in writing after surveying the existing substrate. ### How long does a house exterior take to render? +A standard 3-bed semi typically takes 7–14 working days for a full silicone system, weather dependent. Drying times between coats matter — we won't rush a coat onto a wet base coat. ### How long does silicone render last? +Properly specified silicone systems carry 25-year manufacturer warranties and frequently last longer. They don't need repainting — the colour is in the top coat. ### Can render be done in winter? +Silicone render needs above 5°C and dry conditions during application and initial curing. We programme around the weather — November to February is harder but not impossible. ### Does silicone render need painting? +No — the colour is in the top coat. Sand-and-cement render typically needs repainting every 5–8 years, which is why we recommend silicone. ### Can I see the colour before you apply it? +Yes — we apply a sample panel on the actual elevation so you see how the colour reads in the light it'll live in, not under a showroom bulb. ### Will silicone render work over my existing pebbledash? +Sometimes — depends on whether the existing finish is sound and bonded. We survey before quoting. If it's blown or hollow it needs hacking off first. ### Do you handle EWI as well as render? +Yes — full EWI install with insulation boards then the render system over the top. Single quote, single programme, single accountable team. Next Step ## Walls That Look Right For 25 Years. Free site survey within our coverage area, written quote typically within 48 hours, no obligation. 30+ years' combined trade experience across the team, public liability insured, Pontypridd-based. Request Free Estimate 07576 546805 Public Liability Insured Company No. 15585929 30+ Years Combined Experience Related Services Plastering Extensions & New Builds Whole-House Refurbishments Independent, owner-led local builders with 30+ years' combined trade experience across the team. Extensions, full renovations and ground-up builds across Pontypridd, Cardiff and the wider South Wales region. 07576 54680507581 312279info@lewzpropertydevelopment.co.ukPontypridd, South Wales ### EXPLORE - About - Services - Service Areas - Our Work - Reviews - Contact ### SERVICES - Bricklaying - Bathroom Renovations - Kitchen Renovations - Whole-House Refurbishments - Extensions & New Builds - Plastering ### SERVICE AREAS - Builders in Pontypridd - Builders in Rhondda - Builders in Ynysybwl & Abercynon - Builders in Talbot Green - Builders in Aberdare - Builders in Merthyr Tydfil - Builders in Caerphilly - Builders in Cardiff - Builders in Newport - Builders in Bridgend - Builders in Barry - Builders in Bristol © 2026 LEWZ Property Development Ltd. Company No. 15585929. All rights reserved. Privacy PolicyTerms & ConditionsCookie PolicyMon–Sat 7:00 – 18:00 Call NowGet Estimate