Solid wall insulation · Surrey
Solid wall insulation in Sunbury-on-Thames
Solid wall insulation in Sunbury-on-Thames: free survey, written specification and a fixed price, with the details that keep walls dry planned from the start. On solid-walled houses in Sunbury-on-Thames, the gable or the most weather-exposed wall is often the place to start.
- Free survey in TW16 and nearby
- Guide price from £75 per m² + scaffold, 0% VAT
- Fixed written price before work starts
Free survey in Sunbury-on-Thames
Postcode, service and a phone number is all we need.
Part of every quote
- Internal insulation suits single rooms or where the outside can't change
- Solid walls can lose heat roughly twice as fast as an insulated cavity wall
- External insulation keeps room sizes and treats cold bridges well
- Breathable options for stone and lime-mortared walls
Homes and walls in Sunbury-on-Thames
We cover Sunbury-on-Thames and nearby Walton-on-Thames, Hanworth and Ashford (Surrey). It's roughly 8 miles from Sunbury-on-Thames to Woking, the largest town in Surrey. Homes across the South East range from inter-war semis and post-war estates, which are mostly cavity-walled, to older solid-walled cottages and Victorian town terraces.
Much of Surrey 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.
For Sunbury-on-Thames homeowners weighing external against internal insulation, the survey sets out both with prices.
- Postcode district
- TW16
- County or area
- Surrey
- Nation
- England
- Nearby
- Walton-on-Thames, Hanworth, Ashford (Surrey), Feltham
England: planning and regulations
Before quoting in Sunbury-on-Thames, we check whether the property is in a conservation area, under an Article 4 direction or listed, because that decides whether changing the outside needs planning permission.
Building control applies once more than half of a wall is insulated or re-rendered, or more than a quarter of the whole building envelope, and your written quote says how that's handled.
What does solid wall insulation cost?
External systems run at roughly £105–£210 per m² of wall depending on the board and finish. Internal insulation is roughly £75–£130 per m², plus the cost of moving radiators, sockets and kitchen units.
Solid wall insulation prices in Sunbury-on-Thames
| Item | Guide price | Notes |
|---|---|---|
| External (EWI) | £105–£210 per m²0% VAT | By board and finish |
| Internal (IWI) | £75–£130 per m²0% VAT | Plus making good |
| Survey and written recommendation | Free with a quote |
Confirmed by a fixed written quote after survey. 0% VAT: installing insulation in a home is zero-rated until 31 March 2027, so these figures are the total; 5% applies from 1 April 2027.
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.
Solid wall insulation in Sunbury-on-Thames: questions
Does solid wall insulation cause condensation?
It can if detailed poorly, particularly internally. A condensation risk check for the proposed build-up and careful detailing at joists, reveals and corners avoid it.
Can I do one wall at a time?
Yes. Many owners start with the coldest or most exposed elevation, often a gable end.
Is solid wall insulation worth it?
For many solid-walled homes it's one of the biggest single improvements to comfort, because the walls are often the largest heat-loss area. Savings depend on the home and heating, so we don't promise a figure.
Do you cover Sunbury-on-Thames?
Yes — we survey and quote solid wall insulation in Sunbury-on-Thames (TW16) and nearby Walton-on-Thames, Hanworth and Ashford (Surrey), with a fixed written price before any work starts.