Local EWI & Rendering Installers
External Wall Insulation in St Albans
Insured, TrustMark-registered installers of external wall insulation and silicone render, working across St Albans, Harpenden, London Colney, Radlett and Hatfield. Clear pricing, tidy workmanship and a guarantee of up to 25 years.
Why St Albans homes benefit from external wall insulation
St Albans has one of the most varied housing stocks in Hertfordshire: Victorian and Edwardian terraces around St Peters and the city centre, 1930s semis in Fleetville and Marshalswick, and post-war homes in Cottonmill and How Wood. Many of these have solid walls that lose heat fast and suffer from damp patches and tired brickwork.
An insulated render system wraps the outside of the house in EPS, Rockwool or Kingspan boards and finishes it with a durable silicone, scratch, brick-effect or pebble dash render. The result: warmer rooms, lower bills, protected brickwork and a fresh, modern façade – without losing any interior space.
Our Work Near You
Recent projects near St Albans
How much does external wall insulation cost in St Albans?
As a guide, our insulated render systems start from £120/m² for EPS, £140/m² for Rockwool and £135/m² for Kingspan, including the render finish. A typical three-bed semi with around 100 m² of external wall usually comes to roughly £12,000–£14,000 depending on the material, access and detailing. Every quote is free, written and itemised – try our cost calculator or book a free survey.
St Albans EWI questions, answered
Do I need planning permission for external wall insulation in St Albans?
In most cases no – EWI usually falls under permitted development. Where consent is needed, the local authority is St Albans City & District Council. Parts of the city centre are conservation areas, so we always check before we start – it’s included in the free survey.
How long does an EWI installation take?
A typical semi takes 5–10 working days including scaffolding, boarding, rendering and finishing. We protect driveways and gardens and tidy the site every day.
Which areas around St Albans do you cover?
We cover Fleetville, Marshalswick, St Peters, Cottonmill, How Wood, plus Harpenden, Redbourn, London Colney, Radlett and Wheathampstead.
What guarantee do I get?
Every installation comes with a written workmanship warranty, with insurance-backed cover of up to 25 years available for complete peace of mind.
Get your free St Albans quote
Tell us about your property and we’ll come back the same working day. Or call 020 4542 3074.