Wood fibre EWI · Greater London
Wood fibre insulation for older homes in Harrow
Need wood fibre external wall insulation in Harrow? Tell us about the property and we'll arrange a free survey and a written quote. If your home in Harrow is in a conservation area, we check the council's position on render before suggesting wood fibre EWI.
- Free survey in HA2 and nearby
- Guide price from £150 per m² + scaffold, 0% VAT
- Fixed written price before work starts
Free survey in Harrow
Postcode, service and a phone number is all we need.
What's included
- High density gives good protection from summer heat
- Compatible with lime renders used on traditional buildings
- Often the most suitable EWI where planning allows on older properties
- Made from a renewable material with low embodied carbon
What we look for in Harrow
We also cover Wembley and Northolt, close to Harrow. 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 period homes in Harrow, the survey looks closely at existing lime mortars and any cement patching that may trap moisture.
- Postcode district
- HA2
- County or area
- Greater London
- Nation
- England
- Nearby
- Wembley, Northolt, Greenford, Ruislip
England: planning and regulations
Planning in Harrow 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.
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 Harrow
| 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%.
What happens next
Enquiry
Send your postcode and a few details.
Measured survey
Walls, damp, eaves, cills and services recorded.
Written price
A fixed price with the specification attached.
Work and handover
Installed, inspected and documents handed over.
Wood fibre EWI in Harrow: questions
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.
Does wood fibre need a lime render?
It needs the render specified by the system manufacturer, which is usually lime or mineral based.
Is wood fibre worth the extra cost?
On older solid walls the main benefit is moisture safety rather than raw U-value. If the wall needs to breathe, the cheaper option can cost more later.
Do you cover Harrow?
Yes — we survey and quote wood fibre external wall insulation in Harrow (HA2) and nearby Wembley, Northolt and Greenford, with a fixed written price before any work starts.