Solid wall insulation · Surrey
Solid wall insulation in Farnham
Need solid wall insulation in Farnham? Tell us about the property and we'll arrange a free survey and a written quote. On solid-walled houses in Farnham, the gable or the most weather-exposed wall is often the place to start.
- Free survey in GU9 and nearby
- Guide price from £75 per m² + scaffold, 0% VAT
- Fixed written price before work starts
Free survey in Farnham
Postcode, service and a phone number is all we need.
What you get
- In England and Wales, Building Regulations apply when more than half of a wall is treated
- External insulation keeps room sizes and treats cold bridges well
- Solid walls can lose heat roughly twice as fast as an insulated cavity wall
- Breathable options for stone and lime-mortared walls
Farnham: walls, weather and approvals
Surveys in Farnham also cover the surrounding GU9 district and towns such as Aldershot and Fleet. Farnham is about 13 miles from Woking. 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 Farnham homeowners weighing external against internal insulation, the survey sets out both with prices.
- Postcode district
- GU9
- County or area
- Surrey
- Nation
- England
- Nearby
- Aldershot, Fleet, Farnborough, Bordon
Approvals in England
Before quoting in Farnham, 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.
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.
How can I tell if my walls are solid?
Measure the wall thickness at a window or door: about 225mm (9 inches) of brick usually means solid, while 260mm or more often means a cavity. On exposed brick, a pattern with bricks laid end-on (headers) every few courses points to solid construction. Stone walls are usually solid regardless of thickness. Age is a strong clue too — most homes built before the 1920s are solid-walled.
Solid wall insulation prices in Farnham
| 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.
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.
Solid wall insulation in Farnham: questions
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.
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.
Do you cover Farnham?
Yes — we survey and quote solid wall insulation in Farnham (GU9) and nearby Aldershot, Fleet and Farnborough, with a fixed written price before any work starts.