K-Rend approved applicators in London.
K-Rend is the UK's leading silicone-coloured render brand — manufactured by Kilwaughter Minerals Limited in Northern Ireland, BBA certified (97/3428), Kitemarked, NHBC accepted. We're approved applicators for the full range: Silicone K1, K1 Spray, TC15 thin-coat, and LW1 for EWI build-ups. Across London & the Home Counties.
The K-Rend facts.
- Manufacturer
- Kilwaughter Minerals Limited, Northern Ireland. UK's largest independent manufacturer of silicone-coloured renders.
- Cost in London (2026)
- £65–£120/m² installed depending on product. Monocouche £65–£90, Silicone K1 £75–£100, TC15 £80–£110, LW1 EWI finish £100–£130.
- Lifespan
- 25–40 years (Silicone K1) · 25–35 years (monocouche).
- Standards & certification
- BBA 97/3428 · CE marked BS EN 998-1:2016 · Kitemarked · NHBC accepted (Part 6 Superstructure).
- Colours
- 40+ standard colours including White, Polar White, Cream, Oatmeal, Champagne, and a range of greys. Bespoke matching available.
- Application
- Spray or hand-applied. Silicone K1 finished at 16–20mm thickness. TC15 thin-coat 1–3mm over base.
- Substrates
- Brickwork, blockwork, concrete, sand & cement render base coats. EPS insulation (LW1 system). Render board (TC15 system).
- Our status
- Approved applicator across the full K-Rend range. Audited annually. 10-year insurance-backed workmanship guarantee on top of K-Rend's product warranty.
Four K-Rend systems, one approved applicator.
K-Rend's product range covers everything from premium residential silicone right through to commercial-grade EWI build-ups. We install all four core systems — and we'll recommend which makes sense for your property at the site visit.
The flagship. One-coat self-coloured polymer-modified cementitious render with silicone admixture, applied at 16–20mm. Hydrophobic surface beads water off carrying dirt with it. 25–40 year lifespan.
Best for: premium residential, exposed properties, anywhere low maintenance matters · London cost: £75–£100/m²
View official datasheet →Same K1 formulation engineered for spray application. Two-person crews cover 15–25m²/day. Cuts time on site by 30–40% on large façades. Particularly suited to new-build developments and commercial work.
Best for: new-builds, commercial, large detached homes · London cost: £70–£95/m²
View datasheet library →Silicone thin-coat finish (1–3mm) applied over a base coat with mesh reinforcement. The render finish on K-Rend's EWI and render board systems. Highly flexible, crack-resistant.
Best for: EWI build-ups, render board, new-build · London cost: £80–£110/m²
View NBS specification →Light-weight one-coat render specifically designed for application onto mechanically fixed EPS 70 insulation boards. The render finish in K-Rend's full EWI system. To BS EN 13163:2012.
Best for: full EWI build-ups, retrofit insulation projects · London cost: £100–£130/m² for render finish portion
View our EWI page →Why K-Rend dominates UK silicone render.
K-Rend isn't the only silicone render on the UK market — Weber, Parex and PRB all make excellent silicone systems too. But K-Rend has earned its market-leader position through three things: product consistency, an extensive UK distribution network, and the strongest contractor training programme.
For homeowners, that means the finish you see in K-Rend's brochures is the finish you'll actually get on your house — assuming it's installed by an approved applicator. For developers and architects, it means specifying K-Rend gives you confidence the warranty will hold, the colour will match across plots, and the product will be available on programme.
- UK market leader since 1989
- BBA certified 97/3428
- CE marked BS EN 998-1
- NHBC accepted
- 40+ through-coloured colours
- Self-cleaning silicone finish
What K-Rend costs in London.
Pricing varies by which K-Rend product, property condition, scaffolding requirements, and colour choice. London prices sit 15–25% above national averages. Bespoke colours add £10–£20/m².
All prices include labour, materials, base coat where required, mesh, beading, scaffolding and clean-up. *TC15 and LW1 totals reflect the full system price including base coat / insulation build-up, not just the K-Rend finish coat. Removal of existing render adds £25–£40/m².
K-Rend vs Weber, Parex & PRB.
We are approved for all four major UK render brands, so we don't have a horse in this race. Here's how K-Rend stacks up if you're trying to decide between them.
For most London residential projects, all four brands deliver excellent results. The biggest factor isn't usually the brand — it's whether the applicator is approved by the manufacturer to install it. We are approved for all four.
What people ask about K-Rend.
How much does K-Rend cost per m² in London?
K-Rend installation in London costs £65–£120 per m² in 2026 depending on the product:
— K-Rend Monocouche: £65–£90/m²
— K-Rend Silicone K1: £75–£100/m²
— K-Rend K1 Spray: £70–£95/m²
— K-Rend TC15 thin-coat: £80–£110/m²
— K-Rend LW1 on EWI: £100–£130/m² for render finish portion
All prices include labour, materials, base coat where required, mesh, beading, and scaffolding. London prices sit 15–25% above national averages.
What is K-Rend Silicone K1?
K-Rend Silicone K1 is the flagship product from Kilwaughter Minerals Limited — a self-coloured, spray- or hand-applied one-coat polymer-modified cementitious render with silicone admixture, applied at 16–20mm finished thickness.
Standards: BBA certificate 97/3428, CE marked to BS EN 998-1:2016, NHBC accepted (Part 6 Superstructure), Kitemarked. The silicone admixture gives the surface a hydrophobic quality — water beads off, carrying dirt with it. The render stays cleaner for longer than non-silicone alternatives.
What's the difference between K-Rend K1 and K-Rend TC15?
K-Rend Silicone K1 is a one-coat 16–20mm thick render applied directly to brickwork or blockwork. Robust, full-thickness coverage, ideal for direct-to-substrate work.
K-Rend Silicone TC15 is a thin-coat (1–3mm) render applied over a base coat with reinforcing mesh — usually on EPS insulation boards for EWI, or on render board systems. Highly flexible and crack-resistant, but requires the base coat build-up underneath.
Short version: K1 for direct render work, TC15 for EWI and engineered build-ups.
Why use a K-Rend approved applicator?
K-Rend approved applicator status means the contractor has been trained by Kilwaughter Minerals on correct application of their systems and is audited periodically. This matters because K-Rend's BBA certificate (97/3428) and NHBC acceptance are conditional on correct installation — the warranty applies only when the product is installed to specification.
An unapproved applicator can compromise the warranty even when using genuine K-Rend product. For warrantied new-builds, NHBC-registered work, or any job where the BBA cert needs to remain valid, approved applicator status isn't optional.
What colours does K-Rend come in?
K-Rend offers 40+ standard colours across their Silicone K1, monocouche, and thin-coat ranges. Popular London choices include:
— Whites: White, Polar White, Ivory
— Creams: Cream, Oatmeal, Champagne, Magnolia
— Sands: Sandstone, Cotswold, Beige
— Greys: Silver Grey, Pewter, Charcoal, Slate
— Darker tones: Mocha, Anthracite, Black
Bespoke colour matching is available for a small premium and 1–2 week lead time. Because K-Rend is through-coloured (pigment runs the full thickness), the colour doesn't fade or chip like painted finishes.
Is K-Rend better than painted render?
Yes — for almost every practical purpose. Painted render needs repainting every 5–10 years; K-Rend doesn't need painting for its 25–40 year lifespan. Painted finishes can chip, peel, and fade — K-Rend's colour is mixed through the render so there's nothing to fail.
The upfront cost of K-Rend is higher (£75–£100/m² vs £40–£60/m² for traditional render plus paint), but over 30 years it's significantly cheaper because there's no ongoing maintenance cost.
Can K-Rend be applied over existing render?
Yes — if the existing render is sound, well-bonded, and free from cracks or blown sections. The surface must be cleaned, repaired where necessary, and primed with a K-Rend-approved primer. If the existing render is failing or includes pebbledash, full removal is usually recommended (adds £25–£40/m²).
We'll tell you straight at the site visit which approach makes sense. Sometimes hacking off and starting fresh is faster and cheaper than trying to work over poor substrate.
How long does K-Rend take to cure?
K-Rend's initial set is typically 4–6 hours, with the scraped texture finish applied within 4–24 hours of application. Full curing takes 28 days. The render is rain-resistant after 24 hours but should ideally be protected from heavy rain for the first 48 hours.
K-Rend cannot be applied below 5°C or above 30°C. UK winter work has weather windows built into the programme — your applicator should be honest about this when quoting timeline.
Compare with other systems.
£75–£100/m² in London. 25–40 year lifespan, hydrophobic self-cleaning surface. K-Rend, Weber, Parex compared.
Silicone render guide →£65–£95/m² in London. 25–35 year lifespan, single-coat application, ideal for new-builds.
Monocouche guide →Sand & cement, monocouche, silicone, lime, spray render, EWI — all explained with our live calculator.
All services →K-Rend's product warranty + our workmanship guarantee.
Every K-Rend job carries the manufacturer's product warranty plus our 10-year insurance-backed workmanship guarantee plus £1m public liability insurance. Three layers of cover.
Ready to discuss your K-Rend project?
Free site visits across London & the Home Counties. We'll measure up, recommend the right K-Rend system for your property, and give you a fixed written quote.