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.
30+ Years Combined Trade Experience · Fixed Written Quotes · Same-Week Surveys
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 Of
Doing 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 To
Final 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 You
Actually 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 · Aberdare · Merthyr Tydfil · Caerphilly · Cardiff · Newport · Bridgend
Full Service Area MapFull 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
Straight
Answers.
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?
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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.
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