Non-traditional houses · Greater London
Non-traditional and concrete house insulation in Hanworth
We quote non-traditional house insulation for homes in Hanworth (TW13) and nearby Feltham and Sunbury-on-Thames, with guide prices online and a free survey to fix the price. Where one half of a pair in Hanworth is insulated and the other isn't, we detail the boundary so the neighbour can join later.
- Free survey in TW13 and nearby
- Guide price from £120 per m² + scaffold, 0% VAT
- Fixed written price before work starts
Free survey in Hanworth
Postcode, service and a phone number is all we need.
Included as standard
- EWI is not a structural repair for PRC houses designated defective
- The survey identifies the construction type before anything is specified
- Fixing design depends on the panel or frame behind the wall
- Most system-built homes have thin, cold walls and no fillable cavity
Hanworth: walls, weather and approvals
We cover Hanworth and nearby Feltham, Sunbury-on-Thames and Hounslow. 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.
Where a home in Hanworth is system-built, the first job is confirming the construction type.
- Postcode district
- TW13
- County or area
- Greater London
- Nation
- England
- Nearby
- Feltham, Sunbury-on-Thames, Hounslow, Ashford (Surrey)
England: planning and regulations
Before quoting in Hanworth, 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.
Does EWI fix mortgage problems with PRC houses?
Not on its own. Some precast reinforced concrete (PRC) house types were designated defective, and many lenders want a certified structural repair before they will lend. Insulation and render over the outside is not that repair. Other types, such as Wimpey no-fines, are generally treated differently. If mortgageability matters, speak to your lender or a surveyor before booking any work.
Non-traditional and concrete house insulation prices in Hanworth
| Item | Guide price | Notes |
|---|---|---|
| EWI on concrete or steel-framed walls | £120–£180 per m²0% VAT | Includes extra preparation |
| Semi-detached, full house | £11,400–£21,2000% VAT | 80–100 m² of wall, including scaffold |
| Concrete repairs found at survey | Priced separately | Only where needed |
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.
Non-traditional houses in Hanworth: questions
Can you put EWI on a BISF house?
Yes, with care. The steel frame and upper-storey cladding need a system and fixing method designed for that construction, and the condition of the frame should be understood first.
What if my neighbour isn't insulating?
We finish the system neatly at the boundary with a closing detail so the neighbouring house isn't affected and can be joined later.
Can you insulate a Wimpey no-fines house?
Yes. No-fines houses have solid poured-concrete walls with no cavity, so EWI is the usual route. The survey checks the concrete condition first.
Do you cover Hanworth?
Yes — we survey and quote non-traditional house insulation in Hanworth (TW13) and nearby Feltham, Sunbury-on-Thames and Hounslow, with a fixed written price before any work starts.