Silicone render · County Down
Silicone render in Castlereagh
We quote silicone render for homes in Castlereagh (BT5) and nearby Belfast and Holywood, with guide prices online and a free survey to fix the price. On tree-shaded or north-facing walls in Castlereagh, silicone's water repellence helps it stay cleaner for longer.
- Free survey in BT5 and nearby
- Guide price from £66 per m² + scaffold, inc VAT
- Fixed written price before work starts
Free survey in Castlereagh
Postcode, service and a phone number is all we need.
What the job covers
- Used as the finish on most EWI systems
- Can also go straight onto prepared masonry
- Fine, even grain from about 1–2mm
- Vapour-open, so walls can still breathe

Homes and walls in Castlereagh
Surveys in Castlereagh also cover the surrounding BT5 district and towns such as Belfast and Holywood. Castlereagh is about 11 miles from Bangor (County Down). Northern Ireland has many rendered and pebble-dashed homes, older solid-walled rural houses, and estates built by the Housing Executive.
Exposure to wind-driven rain varies across County Down: sheltered town streets fare better than walls on high ground or facing the prevailing weather, and the render, beads and cill details are chosen with that in mind.
If you're re-rendering in Castlereagh, we'll show you what adding insulation under the silicone would cost at the same time.
- Postcode district
- BT5
- County or area
- County Down
- Nation
- Northern Ireland
- Nearby
- Belfast, Holywood, Newtownabbey, Lisburn
Northern Ireland: planning and regulations
In Northern Ireland, permitted development is set by the 2015 Order; in Castlereagh, changing a house's external appearance, and any work on flats or listed buildings, may need permission, so we check with the council.
Council building control in Northern Ireland checks insulation work of this kind; the quote says how the application is handled.
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 Castlereagh
| 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%.
From enquiry to finished wall
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 Castlereagh: questions
Can I paint silicone render later?
Yes, with a compatible silicone paint, though through-coloured render rarely needs it.
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 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.
Do you cover Castlereagh?
Yes — we survey and quote silicone render in Castlereagh (BT5) and nearby Belfast, Holywood and Newtownabbey, with a fixed written price before any work starts.