External Wall Insulation
Professional EWI installation with 25-year guarantee across the East Midlands
About External Wall Insulation
External Wall Insulation (EWI) fits a layer of insulation to the outside of your property's walls, finished with a weatherproof render. It's one of the most effective ways to insulate solid-wall properties that have no cavity to fill, wrapping the whole building in a continuous thermal layer that eliminates cold bridging and dramatically cuts heat loss. As a bonus, EWI also gives tired-looking brick or render a smart, refreshed exterior finish.
Benefits of External Wall Insulation
Dramatic Energy Savings
Wrapping the whole building in continuous insulation significantly reduces heat loss through solid walls, with many homeowners seeing a noticeable drop in heating bills.
Transform Appearance
A fresh render finish, available in a range of colours and textures, gives your home a smart, modernised exterior while covering cracks or tired brickwork.
Eliminate Cold Spots
Because the insulation wraps the whole exterior without gaps, EWI removes the cold bridging and draughts common in solid-wall properties.
Increase Property Value
A significantly improved EPC rating and refreshed exterior make EWI-treated homes more attractive to buyers and can support a higher valuation.
25-Year Guarantee
All our External Wall Insulation work comes with a 25-year insurance-backed guarantee and Building Control Certificate as standard.
Our Process
We start with a free survey to assess your walls, existing render or brickwork condition, and any repairs needed before insulating. Once agreed, we fix insulation boards to the exterior walls, reinforce with a base coat and mesh, and apply your chosen render finish. Scaffolding is erected for the duration of the works, and most homes are completed within one to two weeks depending on size, with the property fully liveable throughout since all work takes place outside.
Finish Options
We offer a range of silicone and acrylic render finishes in a wide choice of colours and textures, from smooth modern finishes to more traditional textured renders. We'll talk through the options during your survey to find a finish that suits your property and personal taste.
Why Choose Green & Cosy Homes?
Expert Installation
Our EWI teams are experienced in solid-wall properties across the East Midlands, from Victorian terraces to non-traditional post-war construction.
Comprehensive Guarantee
25-year insurance-backed guarantee included.
BlueFlame Certified
PAS 2030:2023 certified installation specialists.
Complete Project Management
From the initial free survey through scaffolding, installation, and final sign-off, we manage the whole project so you don't have to coordinate multiple contractors.
Ready for Your Free Survey?
Get a free EWI survey, expert advice, and detailed quotation today.