Silicone render · Wales
Silicone render in South Glamorgan
Silicone render across South Glamorgan: measured survey, clear specification and a fixed written price before any work starts. On tree-shaded or north-facing walls in South Glamorgan, silicone's water repellence helps it stay cleaner for longer.
- Free survey and fixed written price
- Guide price from £66 per m² + scaffold, inc VAT
- Planning and building control checked for Wales
Free survey in South Glamorgan
Tell us the postcode and what you need.
What the job covers
- Vapour-open, so walls can still breathe
- Used as the finish on most EWI systems
- Fine, even grain from about 1–2mm
- Through-coloured — no painting needed
- Water-repellent surface that dries quickly after rain
Homes and walls in South Glamorgan
South Wales has long runs of solid-wall valley terraces, Victorian and Edwardian town housing and post-war council estates.
Exposure to wind-driven rain varies across South Glamorgan: 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.
Silicone suits most rendering jobs in South Glamorgan, either on its own or over insulation.
- Nation
- Wales
- Region
- South Wales
- Towns covered
- Cardiff, Barry, Penarth
- Guide price
- From £66 per m² + scaffold · inc VAT
Wales: planning and regulations
Permitted development rules for houses in Wales are similar to England's: a similar-appearance finish on a house is often permitted, while conservation areas, National Parks, Areas of Outstanding Natural Beauty, flats, commercial buildings and listed buildings need permission or consent. Your local planning authority has the final word.
The Building Regulations as they apply in Wales treat insulating or re-rendering more than half of a wall's area, or more than a quarter of the building's whole envelope, as renovating a thermal element, with Approved Document L (Wales) setting the target. Building control is involved before work starts.
How is silicone render applied?
On masonry, the wall is prepared and any loose material removed. A base coat with glass-fibre mesh is applied over the whole wall to resist cracking, followed by a primer and the silicone finish, trowelled to its grain size. On EWI, the same base coat, primer and finish go over the insulation boards.
Silicone render prices in South Glamorgan
| 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
Get a guide price
Try the online quote tool for a ballpark figure.
Book the survey
A visit at a time that suits you.
Agree the quote
Nothing starts until you've signed the written price.
We do the work
Planned around weather, with you kept informed.
Silicone render in South Glamorgan: questions
Can I paint silicone render later?
Yes, with a compatible silicone paint, though through-coloured render rarely needs it.
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.
Do you cover all of South Glamorgan?
Yes. We survey and quote silicone render across South Glamorgan, including Cardiff, Barry, Penarth.
Do I need planning permission in Wales?
Permitted development rules for houses in Wales are similar to England's: a similar-appearance finish on a house is often permitted, while conservation areas, National Parks, Areas of Outstanding Natural Beauty, flats, commercial buildings and listed buildings need permission or consent. We check your address before quoting.