Wood fibre EWI · Greater London
Wood fibre insulation for older homes in Isleworth
We quote wood fibre external wall insulation for homes in Isleworth (TW7) and nearby Hounslow and Heston, with guide prices online and a free survey to fix the price. For period homes in Isleworth, the survey looks closely at existing lime mortars and any cement patching that may trap moisture.
- Free survey in TW7 and nearby
- Guide price from £150 per m² + scaffold, 0% VAT
- Fixed written price before work starts
Free survey in Isleworth
Postcode, service and a phone number is all we need.
What the job covers
- High density gives good protection from summer heat
- Often the most suitable EWI where planning allows on older properties
- Thicker than foam for the same U-value
- Vapour-open and hygroscopic — buffers moisture rather than trapping it
Before we quote in Isleworth
We also cover Hounslow and Heston, close to Isleworth. 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.
If your home in Isleworth is in a conservation area, we check the council's position on render before suggesting wood fibre EWI.
- Postcode district
- TW7
- County or area
- Greater London
- Nation
- England
- Nearby
- Hounslow, Heston, Richmond, Southall
England: planning and regulations
Before quoting in Isleworth, 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.
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.
What finish goes over wood fibre?
A lime-based or mineral render designed for the system, applied over a reinforcing base coat. Lime finishes give the softer, slightly irregular texture that suits cottages and older terraces.
Wood fibre insulation for older homes prices in Isleworth
| Item | Guide price | Notes |
|---|---|---|
| Wood fibre + lime render system | £150–£210 per m²0% VAT | Excluding scaffold |
| Cottage, about 90 m² of wall | £15,300–£22,1000% VAT | Including scaffold |
| Lime render only (no insulation) | £78–£132 per m²inc VAT | See lime render |
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. Prices include VAT at 20%.
How it works
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.
Wood fibre EWI in Isleworth: questions
Does wood fibre need a lime render?
It needs the render specified by the system manufacturer, which is usually lime or mineral based.
Can wood fibre go on a stone wall?
Yes, after levelling. Rubble stone is often uneven, so a levelling coat or adapted fixing method is used first.
Is wood fibre insulation fireproof?
No — it's a timber product. It chars rather than flaming readily, but it is combustible, so it's used on low-rise buildings within a tested system and never where non-combustible materials are required.
Do you cover Isleworth?
Yes — we survey and quote wood fibre external wall insulation in Isleworth (TW7) and nearby Hounslow, Heston and Richmond, with a fixed written price before any work starts.