External Wall Insulation Specialists
About Us
Meet the Team
Trusted External Wall Insulation Contractors in London and Surrounding Areas
EWI Specialist Ltd is an Essex-based team delivering external wall insulation and high-quality render finishes across London and the South East.
Founded by Sebastian & Sebastian, we bring over 21 years’ hands-on experience.
We survey, design and install manufacturer-approved EWI systems that cut heat loss, improve comfort and lift kerb appeal – installed to spec and built to last.
Sebastian
Director
We started EWI Specialist Ltd on site, delivering the first jobs ourselves…
Ream more
As the work grew, so did our team – backed by solid technical know-how, ongoing training and industry accreditations.
Our aim is straightforward: make homes warmer, safer and better looking with external wall insulation and quality rendering.
We keep things simple: clear communication, meticulous detail and installations carried out exactly to manufacturer’s system specifications and regulations.
That’s how we achieve durable, defect-free results that stand the test of time.
Sebastian
Director
We started EWI Specialist Ltd on site, delivering the first jobs ourselves…
Read more
As the work grew, so did our team – backed by solid technical know-how, ongoing training and industry accreditations.
Our aim is straightforward: make homes warmer, safer and better looking with external wall insulation and quality rendering.
We keep things simple: clear communication, meticulous detail and installations carried out exactly to manufacturer’s system specifications and regulations.
That’s how we achieve durable, defect-free results that stand the test of time.
Bogna
Office Manager
I keep the wheels turning day to day. From the first enquiry to final handover…
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I plan schedules, organise resources and make sure every stage is prepared and delivered on time. I oversee logistics and admin and keep information flowing clearly across the team.
Precision, good organisation and open communication are my focus – so our installers can concentrate on doing their best work for clients.
Kasia
Office
I look after client documents and contracts and prepare full warranty packs…
Read more
Including complete photographic records. Thorough, accurate paperwork means every project is properly documented, service stays smooth and the high standards EWI Specialist is known for are maintained.
Over 21 Years of Experience
Why Choose EWI Specialists?
With 21+ years’ experience, our fully insured installers deliver external wall insulation and rendering that lasts – protecting brickwork, cutting heat loss and refreshing your façade. Tidy, on-time workmanship, clear pricing, and 4.9★ Google-rated service.
Our Partners
Local Family Business
We proudly offer a 10-year workmanship warranty on all our rendering and insulating services.
Do you need extra protection? We also offer a 10-year insurance-backed warranty for a small additional cost, giving you long-term comfort and peace of mind.
Our Certification
Qualified Wall Insulation Installers
We’re always sharpening our skills so you get insulation that’s efficient, reliable and finished to a high standard, aiming to exceed your expectations every time.
