Silicone render · Greater London
Silicone render in Carshalton
If you're planning silicone render in Carshalton, start with a free survey: we measure, check the walls and confirm planning and building control for your address. If you're re-rendering in Carshalton, we'll show you what adding insulation under the silicone would cost at the same time.
- Free survey in SM5 and nearby
- Guide price from £66 per m² + scaffold, inc VAT
- Fixed written price before work starts
Free survey in Carshalton
Postcode, service and a phone number is all we need.
What's included
- Through-coloured — no painting needed
- Used as the finish on most EWI systems
- Vapour-open, so walls can still breathe
- Water-repellent surface that dries quickly after rain
Local considerations in Carshalton
We also cover Wallington and Sutton, close to Carshalton. London's housing includes a large stock of Victorian and Edwardian solid-wall terraces, inter-war semis and post-war blocks, and conservation areas cover many streets — so planning is often the first question for external work.
Much of Greater London sits in the lower wind-driven rain exposure bands, which keeps the choice of finishes wide — though hilltop, coastal and exposed gable walls can still need a tougher specification, so we check the actual site.
Silicone suits most rendering jobs in Carshalton, either on its own or over insulation.
- Postcode district
- SM5
- County or area
- Greater London
- Nation
- England
- Nearby
- Wallington, Sutton, Mitcham, Morden
Planning and building control in England
For a house in Carshalton, external insulation or render is often permitted development if it looks similar to the existing walls; conservation areas, flats, commercial buildings and listed buildings need permission or consent, so we check your address first.
If the work covers more than half of a wall, or a quarter of the building's whole envelope, it counts as renovating a thermal element, with a target of about 0.30 W/m²K where feasible.
Is silicone render maintenance-free?
Not quite. It stays cleaner than most renders because water runs off and dries quickly, but north-facing or tree-shaded walls can still gather algae. A gentle biocide wash every few years keeps it looking new. Pressure washing is avoided because it can damage the surface.
Silicone render prices in Carshalton
| Item | Guide price | Notes |
|---|---|---|
| Silicone render on masonry (with base coat + mesh) | £66–£102 per m²inc VAT | Excluding scaffold |
| Front and side of a semi (≈60 m²) | £3,960–£6,120inc VAT | Plus scaffold |
| As the finish on EWI | Included in EWI rates |
Confirmed by a fixed written quote after survey. Prices include VAT at 20%.
What happens next
Enquiry
Send your postcode and a few details.
Measured survey
Walls, damp, eaves, cills and services recorded.
Written price
A fixed price with the specification attached.
Work and handover
Installed, inspected and documents handed over.
Silicone render in Carshalton: questions
Can silicone render go over old render?
If the old render is sound and well bonded, often yes after cleaning and priming. Hollow or cracked areas are cut out and repaired first.
How long does silicone render take to dry?
It's touch-dry within hours but needs dry weather above about 5°C for the first day or two to cure properly.
Can I paint silicone render later?
Yes, with a compatible silicone paint, though through-coloured render rarely needs it.
Do you cover Carshalton?
Yes — we survey and quote silicone render in Carshalton (SM5) and nearby Wallington, Sutton and Mitcham, with a fixed written price before any work starts.