Group C · External wall insulation and render
K Rend silicone through-coloured render
One- or two-coat silicone render that cleans itself and never needs painting.
Price by property type
Re-render only (K Rend silicone)
- Mid-terrace£4,000–£7,500
- Semi / end-terrace£6,500–£12,000
- Detached£9,000–£18,000
- Bungalow£5,500–£10,000
- Flat / block£55–£95 per m²
Before grants · updated 11 October 2026 · a survey confirms the final figure.
- Best for
- New render and re-render on block and brick
- Guarantee or standard
- System holder guarantee
- Time on site
- Usually one to two weeks for a typical house including scaffolding, depending on size, repairs and weather.
- Typical price
- From £4,000
What it is
What is K Rend silicone through-coloured render?
One- or two-coat silicone render that cleans itself and never needs painting.
Best for: New render and re-render on block and brick.
Build-up
Render only
- 1Existing wall
- 2Base coat and mesh, where the system needs it
- 3Render finish
No insulation layer — render is a finish, never sold as insulation.
Who it suits
Which homes is K Rend silicone through-coloured render suitable for?
Is my home suitable?
Pick your property type for a straight answer on K Rend silicone through-coloured render.
Guidance only — every home is different, and a survey confirms what suits yours.
Houses
- Detached house
- Semi-detached house
- End-of-terrace
- Mid-terrace
- Townhouse
- Mews house and cottage
- Detached bungalow
- Semi and terraced bungalow
- Chalet and dormer bungalow
- Period home
- 1930s home
- Post-war and ex-council house
- Non-traditional / system-built
- Listed building or conservation area
- Farmhouse, barn conversion or rural home
- New build or self-build
Flats and blocks of flats
Commercial and public buildings
Usually suitable Depends — a survey confirms
Not usually suitable for 5 property types
- Park and mobile home — Park and mobile homes need specialist systems, which we arrange through a partner rather than standard measures.
- Purpose-built flat — A flat's outside walls are the building's responsibility, so rendering is done as building-wide works.
- Ground-floor, top-floor flat or maisonette — A flat's outside walls are the building's responsibility, so rendering is done as building-wide works.
- Mansion block — A flat's outside walls are the building's responsibility, so rendering is done as building-wide works.
- Ex-local-authority flat or maisonette — A flat's outside walls are the building's responsibility, so rendering is done as building-wide works.
Materials and brands
What we use
One- or two-coat silicone render, self-cleaning, no painting (K Rend K1, Silicone TC15, HP14).
EWI and render brands we work with
- Sto
- Weber
- K Rend
- Wetherby
- Parex
Insurance-backed EWI usually requires approved-installer status with the system holder. The exact system and brand for your home are confirmed in your written quote.
Heat, bills and EPC
What it does for your heat loss, bills and EPC
Render on its own is weatherproofing and appearance — it doesn't insulate, so it won't lower the wall's U-value, your heating bills or your EPC. If lower bills or a better rating is the goal, external wall insulation puts insulation under the new finish while the scaffold is already up.
See the EPC points and savings for your home in the EPC plannerU-value before and after, typical heat and bill saving, and EPC points — worked out for your property.Price
How much does K Rend silicone through-coloured render cost?
Prices change with your property type. Pick your column — the quote builder then refines it for your home.
| Measure | Mid-terrace | Semi / end-terrace | Detached | Bungalow | Flat / block |
|---|---|---|---|---|---|
| Re-render only (K Rend silicone) | £4,000–£7,500 | £6,500–£12,000 | £9,000–£18,000 | £5,500–£10,000 | £55–£95 per m² |
Indicative ranges for London and the South East, supplied and installed, including VAT, before grants. Updated 11 October 2026. A survey confirms your final price.
VAT on this work
Render without insulation isn't an energy-saving material, so standard VAT applies. External wall insulation in homes is zero-rated until 31 March 2027.What to expect
Time on site, disruption and approvals
Time on site
Usually one to two weeks for a typical house including scaffolding, depending on size, repairs and weather.
Disruption
Most of the work happens outside, so you stay in your home. Scaffolding is up for the duration, and downpipes, meters, lights and satellite dishes are moved and refitted.
Planning and building control
Like-for-like re-rendering doesn't usually need planning permission; changing the look in a conservation area or on a listed building may need permission or consent. Renewing render over a large area of wall can mean Building Regulations expect insulation to be considered at the same time — we'll tell you if it applies.
Guarantee and standard
System holder guarantee. The guarantee and certification for your job are confirmed in writing in your quote.
Questions
K Rend silicone through-coloured render: your questions answered
How much does K Rend silicone through-coloured render cost?
Typical installed prices in London and the South East, including VAT and before any grant: £4,000–£7,500 for a mid-terrace; £6,500–£12,000 for a semi-detached or end-of-terrace house; £9,000–£18,000 for a detached house; £5,500–£10,000 for a bungalow; £55–£95 per m² for a flat. Prices updated 11 October 2026. A survey confirms your final figure.
Is K Rend insulation?
No. K Rend silicone render is a weatherproof, self-cleaning finish — on its own it doesn't insulate, and we never sell render as insulation. Insulated K Rend systems are a different product: that's external wall insulation.
Does K Rend need painting?
No. It's through-coloured, so the colour runs right through the render, and the silicone helps it shed dirt and rain.
Which K Rend products do you use?
K Rend K1, Silicone TC15 and HP14, chosen for the wall — new render or re-render on block and brick.
Group C
More in external wall insulation and render
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Acrylic and silicone thin coat
Thin finishes over a base coat and mesh for a smooth modern finish.
Lime render
Breathable lime render and lime plaster for older solid walls.
Insulating (thermal) lime render
Lime render with an insulating aggregate for modest U-value gains on old walls.
Begin your project
Price K Rend silicone through-coloured render in two minutes
See a price range for your property type, with grants and 0% VAT applied where they fit. A survey always confirms the final figure.