Solid wall insulation · Greater London
Solid wall insulation in New Malden
From New Malden to Surbiton, we price solid wall insulation after a measured survey — no guesswork, and no work starts until the price is agreed in writing. On solid-walled houses in New Malden, the gable or the most weather-exposed wall is often the place to start.
- Free survey in KT3 and nearby
- Guide price from £75 per m² + scaffold, 0% VAT
- Fixed written price before work starts
Free survey in New Malden
Postcode, service and a phone number is all we need.
Part of every quote
- External insulation keeps room sizes and treats cold bridges well
- Breathable options for stone and lime-mortared walls
- Both can be done in stages, elevation by elevation or room by room
- In England and Wales, Building Regulations apply when more than half of a wall is treated
Local considerations in New Malden
As well as New Malden itself, we quote in Surbiton, Morden and Wimbledon. London's housing includes a large stock of Victorian and Edwardian solid-wall terraces, inter-war semis and post-war blocks, and conservation areas cover many streets — so planning is often the first question for external work.
Much of Greater London 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 New Malden homeowners weighing external against internal insulation, the survey sets out both with prices.
- Postcode district
- KT3
- County or area
- Greater London
- Nation
- England
- Nearby
- Surbiton, Morden, Wimbledon, Mitcham
England: planning and regulations
Before quoting in New Malden, 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.
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 New Malden
| 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.
How it works
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.
Solid wall insulation in New Malden: questions
Can I do one wall at a time?
Yes. Many owners start with the coldest or most exposed elevation, often a gable end.
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.
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 New Malden?
Yes — we survey and quote solid wall insulation in New Malden (KT3) and nearby Surbiton, Morden and Wimbledon, with a fixed written price before any work starts.