Solid wall insulation · Greater London
Solid wall insulation in Hounslow
From Hounslow to Isleworth, 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 Hounslow, the gable or the most weather-exposed wall is often the place to start.
- Free survey in TW3 and nearby
- Guide price from £75 per m² + scaffold, 0% VAT
- Fixed written price before work starts
Free survey in Hounslow
Postcode, service and a phone number is all we need.
What the job covers
- Both can be done in stages, elevation by elevation or room by room
- Breathable options for stone and lime-mortared walls
- External insulation keeps room sizes and treats cold bridges well
- Internal insulation suits single rooms or where the outside can't change
Local considerations in Hounslow
We cover Hounslow and nearby Isleworth, Heston and Richmond. 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 solid-walled homes in Hounslow, we check wall thickness and age first to confirm there's no cavity to fill.
- Postcode district
- TW3
- County or area
- Greater London
- Nation
- England
- Nearby
- Isleworth, Heston, Richmond, Hanworth
Planning and building control in England
Planning in Hounslow follows England's national rules: similar-looking finishes on houses are usually permitted, while flats, commercial premises, conservation areas and streets under an Article 4 direction need an application.
Insulating or re-rendering more than half of a wall's area brings in Part L of the Building Regulations, so building control is notified and the wall is upgraded to about 0.30 W/m²K where practical.
External or internal — which is better?
External insulation keeps the wall warm, reduces cold bridging at floors and party walls, renews the outside, and doesn't shrink rooms — but it changes the look and needs scaffolding. Internal insulation keeps the façade unchanged and can be done room by room, but loses 50–100mm of floor space per wall and needs careful detailing to avoid condensation at joists and corners.
Solid wall insulation prices in Hounslow
| 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
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 Hounslow: questions
Can I get a grant for solid wall insulation?
Some schemes cover it for eligible households — for example ECO4 until 31 December 2026, Home Energy Scotland's grant and loan, Wales' Warm Homes Nest and NI's Affordable Warmth Scheme. Each has its own eligibility and installer rules; see our grants guide.
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 Hounslow?
Yes — we survey and quote solid wall insulation in Hounslow (TW3) and nearby Isleworth, Heston and Richmond, with a fixed written price before any work starts.