Silicone render · Cornwall
Silicone render in St Austell
Silicone render in St Austell: free survey, written specification and a fixed price, with the details that keep walls dry planned from the start. If you're re-rendering in St Austell, we'll show you what adding insulation under the silicone would cost at the same time.
- Free survey in PL25 and nearby
- Guide price from £66 per m² + scaffold, inc VAT
- Fixed written price before work starts
Free survey in St Austell
Postcode, service and a phone number is all we need.
What's included
- Can also go straight onto prepared masonry
- Through-coloured — no painting needed
- Used as the finish on most EWI systems
- Fine, even grain from about 1–2mm
Before we quote in St Austell
We also cover Bodmin and Truro, close to St Austell. St Austell sits around 21 miles from Redruth. The South West has many stone and solid-walled cottages, exposed coastal properties and a share of post-war system-built houses, including types such as the Cornish Unit.
Parts of Cornwall fall in the higher wind-driven rain exposure bands, especially coastal and upland sites, so render specification, movement joints and detailing at cills, verges and the base of the wall matter more than usual.
Silicone suits most rendering jobs in St Austell, either on its own or over insulation.
- Postcode district
- PL25
- County or area
- Cornwall
- Nation
- England
- Nearby
- Bodmin, Truro, Newquay, Falmouth
Planning and building control in England
For a house in St Austell, 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.
Insulating or re-rendering more than half of a wall's area brings in Part L of the Building Regulations, so building control is notified and the wall is upgraded to about 0.30 W/m²K where practical.
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 St Austell
| 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
Tell us about the property
Use the quote tool or form, or call. Photos help.
Free survey
We measure, check the walls and confirm approvals.
Fixed written quote
System, details, access, exclusions and VAT in writing.
Installation
Scheduled for suitable weather, with a clear programme.
Silicone render in St Austell: questions
Does silicone render crack?
The mesh-reinforced base coat and the render's flexibility make cracking much less likely than with sand and cement, but structural movement in the wall can still show through.
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 St Austell?
Yes — we survey and quote silicone render in St Austell (PL25) and nearby Bodmin, Truro and Newquay, with a fixed written price before any work starts.