Cost Calculator
Request Your External Wall Insulation Price Guide
Get a comprehensive project breakdown from our local specialists. Request a custom per-m² price guide for EPS, Rockwool, or Kingspan insulation paired with your chosen finish (silicone, scratch, brick-effect or pebble dash).
You will also receive professional energy-saving insights and direct grant guidance tailored to your home.
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 Services
External Insulation and Rendering Services
Keep scrolling to explore our services and learn about the cost of rendering a house. Use our cost calculator for an instant per-m² estimate and a downloadable quote – discover a greener, more cost-effective future for your property.
Rendering Outside Walls
Our experienced external rendering contractors skillfully render houses, delivering a stunning finish to your external house rendering needs.
External Wall Insulation
Our eco-friendly wall insulation systems are designed to provide high-quality external insulation, aiming to enhance thermal efficiency.
Before & After
See the Transformation
Drag the slider to see how external wall insulation transformed this Chelmsford home.
Simple 4-Step Process
How We Work
Free Survey & Quote
1
We visit your home, measure the walls and send a clear written quote. Free and with no obligation.
Design & Materials
2
Choose your insulation (EPS, Rockwool or Kingspan) and render colour. We handle the specification and grant paperwork.
Tidy Installation
3
Our own insured team installs the system, protecting your garden and cleaning up every day.
Up to 25-Year Guarantee
4
We inspect the finished work with you and hand over a written workmanship warranty, with insurance-backed cover of up to 25 years.
Our Work
Recent Insulation and Rendering Projects
At EWI Specialist, our dedication is not just to meet, but to surpass your expectations with our exceptional services. See our work yourself.
Our Partners
Local Family Business
We proudly offer a guarantee of up to 25 years on our rendering and insulating services.
Do you need extra protection? We also offer a insurance-backed guarantee for up to 25 years, giving you long-term comfort and peace of mind.
Key Benefits of External Wall Insulation
Why External Wall Insulation Is the Best Investment for Your Home
External wall insulation tackles the biggest sources of heat loss in solid-wall homes while upgrading your façade in one project. It wraps your property in a warm, weatherproof layer and finishes it with a durable render.
Lower bills - less heat loss
Warmer, drier rooms - cuts condensation
Protects brickwork - weatherproof layer
Boosts kerb appeal & value - modern, clean finish
Our Certification
Qualified Wall Insulation Installers
We continually hone our skills to deliver what we believe to be efficient, reliable, and high-quality insulation solutions, with the goal of meeting or even exceeding your expectations.
