Farnham
External Wall Insulation in Farnham
Based in Ash Vale — about 12 minutes from Farnham
Many of Farnham’s pre-1920 solid-wall homes — Wrecclesham terraces, the older parts of Upper Hale and the period townhouses around Castle Street — bleed heat through pre-cavity wall construction. EWI delivers a step-change in thermal performance.
External Wall Insulation in Farnham: £130–£190 per m² installed. Fixed written quotes after a free survey.
A lot of Farnham's older housing is genuine pre-1919 solid-wall construction — the town's historic core around Farnham Castle, the Georgian streets radiating from it and the Maltings is almost entirely within a conservation area under Waverley Borough Council, in the GU9 and GU10 postcodes — and it's on that stock that external wall insulation and heritage-aware render colours are usually the right conversation to have before anything else.
Planning consent needs checking before work starts on anything within the conservation area or near a Listed Building, which we do as standard rather than leaving a homeowner to find out after the scaffold is up. We're 12 minutes up the road in Ash Vale, and it's one of the towns where planning status, not the technical specification, is usually the first thing we talk through at survey.
Local proof
Our external wall insulation work in Farnham
Recent local work includes Wrecclesham, Hale, Heath End — real photographs from our own projects below.
External wall insulation — Farnham
External wall insulation — Farnham
External wall insulation — Farnham
External wall insulation — Farnham
Costs
External Wall Insulation prices in Farnham
| Work | Typical price |
|---|---|
| External wall insulation | £130–£190 per m² |
Prices updated 11 July 2026 · Every project is quoted individually after a free survey.
Questions
Your questions answered
EWI in Farnham costs £130–£190 per m² installed depending on board type, access and finish. On a solid-wall home it typically cuts heating bills by 25–40% — the Energy Saving Trust estimates £300–£500 a year on a semi-detached property.
Possibly — ECO4 and the Warm Homes: Local Grant support external wall insulation for qualifying households. Eligibility depends on your energy rating and circumstances; we advise on current schemes at survey.
Most Farnham customers choose a silicone thin-coat finish over the insulation for its crack resistance and colour stability; monocouche and brick-effect finishes are also available. All systems are BBA-certified with manufacturer warranties.
Ready for external wall insulation in Farnham?
Free survey, fixed written quote, manufacturer-backed system warranties.