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Miro gave me a fair price and had a slot so could do the work next day. He did an excellent job and was polite, clean and tidy. Had a short lunch break and was finished mid afternoon. Would recommend.
Richard
Brilliant, very nice man and did a very good job
Liam
GM Plasterers did a very good job for us. Quickly and up to a high standard.
Magda
Did you know that up to 45% of heat escapes through uninsulated solid walls? External wall insulation (EWI) is one of the most effective ways to weatherboard your property, eliminate dampness, and dramatically lower heating costs. Rated People connects you with trusted, skilled external wall insulation companies who safely install high-quality thermal barriers and stunning decorative renders. Post your job for free to receive up to three local quotes today.
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External wall insulation installers – Rated People
What can an external wall insulation specialist help with?
External wall insulation is a multi-layered construction process that wraps the outside of your property in a thermal blanket. Qualified EWI contractors possess the specialist scaffolding, materials, and rendering skills required to transform your home’s efficiency:
- Solid wall insulation fitting: Securing high-performance insulation boards directly to older brick or stone exterior walls using specialised mechanical fixers and adhesive mortars.
- Weatherproof rendering and cladding: Applying a durable reinforcement mesh layer followed by a decorative top-coat render. You can choose from smooth, textured, tiled, painted, or panelled finishes to boost curb appeal.
- Moisture control and vapour barriers: Installing breathable membranes and vapour barriers that stop exterior rainwater from penetrating while warming the walls to reduce internal condensation.
- Full site preparation and re-fixing: Managing the entire layout from erecting safe scaffolding to removing and cleanly re-fixing downpipes, satellite dishes, and fixtures once the insulation is complete.
How much does external wall insulation cost and save?
While solid wall insulation requires a larger upfront investment than basic cavity filling, the subsequent heating bill savings are significantly higher. Home improvements of this scale are priced based on the footprint of the building and wall condition:
- Average installation costs: Total project costs typically range between £8,000 and £22,000. A standard semi-detached house usually falls in the middle of this scale, while large detached properties sit at the top.
- Energy bill savings: According to the Energy Saving Trust, wrapping uninsulated solid walls can save you hundreds of pounds annually on your energy bills, making it a highly rewarding long-term investment.
- Government funding & grants: You may be eligible for a financial grant to cover or heavily subsidise these costs under schemes like the Energy Company Obligation (ECO). Check with your energy supplier or the Energy Saving Trust for details.
Find a local external wall insulation installer
Internal vs. external: Is EWI right for your property type?
Before booking a specialist, it is essential to check your underlying wall structure and weigh up your installation choices:
- Are my walls solid or cavity? EWI is designed for older solid walls (typically built before the 1920s). You can identify solid walls by an alternating brick pattern of full and half-length bricks, or by measuring your door opening—solid walls are usually less than 30cm thick.
- Minimal internal disruption: Unlike internal insulation, which requires losing valuable room space, moving radiators, and complete interior redecoration, EWI is fitted entirely outside. You can live inside undisturbed while the work takes place.
- Timeline and weather: On average, an installation takes 3 to 6 weeks to complete. Because the rendering process requires dry conditions, bad winter weather can extend this timeframe.
- Planning permission regulations: If your chosen render finish dramatically changes the look of your house compared to your neighbours, you may need planning permission. This is mandatory if you live in a listed building or a designated conservation area.
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Other external wall insulation FAQ's
What qualifications and insurance should I check for?
While there are no strict legal frameworks, look for tree surgeons or installers holding a City & Guilds NVQ Certificate or Diploma in Insulation and Building Treatments. Reputable companies should also hold Public Liability Insurance and ideally be members of trade bodies like the Insulated Render and Cladding Association (INCA).
What are the top questions to ask an EWI contractor before hiring?
Protect your project by asking: Do you provide a comprehensive insurance-backed guarantee for the render? Will full scaffolding costs be handled within your fixed quote? Will you install an integrated vapour barrier to prevent moisture locks inside the wall structure?
Will external wall insulation fix damp problems inside my house?
Yes, if it is caused by condensation. By warming the temperature of your internal walls, EWI prevents warm, humid indoor air from condensing into water droplets on cold surfaces. Note that it cannot cure rising damp caused by a failed ground-floor damp proof course (DPC).
Sign up as an external wall insulation specialist
Are you an external wall insulation installer or rendering specialist? Homeowners are actively looking for trusted specialists to lower their energy bills, upgrade solid-wall properties, and apply modern weatherproof rendering. Join our network today to get access to local insulation leads, fill your pipeline, and grow your business.
I'm a multi-skilled builder, and I provide a range of services that transforms your home so it becomes a better and more comfortable home for you. I can remodel your kitchen or bathroom, install flooring, help with any paving or landscaping tasks, etc. I can also help out with any general handyman jobs like repairing doors, installing window blinds, hanging pictures, and more. I work with precision and go the extra mile to ensure customers are truly happy with my results. I know deadlines are important and so strive to complete every project on time while still maintaining high quality standards. I live in Milton Keynes, and I cover area radius 1hr from my base. For your peace of mind, I have public liability insurance, and comply with all safety regulations. If you need a reliable, friendly, and helpful builder, I would love to hear from you. Let’s chat about how I can help – please get in touch for a detailed discussion.
I would highly recommend Stan. He has done an amazing and fantastic job in fitting in a new kitchen for my parents. He was friendly and professional through out the work he carried out. He was very hard working and is a very reliable person. My parents love their new kitchen and I am really pleased with the high quality finish as well Stan’s kindness, professionalism and skills. Thank you so much Stan for completing the work to a very high standard. Greatly appreciated.
EMERALD DRYLINING & PLASTERING
External Wall Insulation
We are a local family run business we do dampproofing plastering rendering specialist fully insured give us a call we hope to help you on any future projects
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Hello Rated People I would like to take this chance to formally introduce Ryals.PMS a small local company with a big appetite for all your projects or property servicing needs were small enough to care and big enough to cope with a combined trade experience of over 40 years you know your property or projects big or small are in the safest hands, we cover most of kent and South London Thank you and we hope to see you soon The Ryals Team
STAY well away from this company. Quoted to fit stair carpet and stair rods. Arrived late and Ryan started to cut the stair rods. Ryan stayed for 3 hours then just walked out with no warning and never came back. I then found out that he cut 8 of the stair rods incorrectly. I advised him of this and he said he would replace. After not responding to my texts I can assume he is not replacing them which has now left me £88.00 out of pocket to replace. Be warned .
We offer efficient and reliable services in plastering and rendering, based near Blackheath, South East London. Free quotes.
Very pleasant and easy to deal with. The work itself was good. I will definitely use him again
TCNR
External Wall Insulation
I am a fully qualified and insured plasterer from Essex. No job is to small or big. I am reasonably priced and love the work I do.
Unfortunately I disagree. I posted this as one job and can prove this so will be taking this further. I also paid most of the money. Scott only called back after the tenant was fed up of the job being left unfinished for many many months. He also left a ceiling light hanging which was a health and safety concern and refuses to provide his insurance details.
A professional qualified insured family run business who puts their customers first
Porch repair. John was very helpful and offered several options to help us make a decision. Very pleased with outcome and have booked him for some more work.
Whether you want to install a new kitchen or your home needs urgent repairs, we’ve got you covered. Oliver with a twist home improvements, offers a comprehensive range of building services for customers in Leeds and the North east of England.
Very polite respectful men workmanship excellent only one criticism is Andrew needs to sort time management
RELM Interiors is an established and highly recommended renovation company based in Wimbledon, specialising in full home or office refurbishments, including loft conversions and extensions. We are dedicated to providing an efficient, personable and high quality service to transform your home. RELM Interiors has shown its ability to complete expert renovations to exceptionally high standards across London. We have a team of highly skilled and reliable tradesmen who pride themselves on their dedication and attention to detail when transforming your space into something beautiful for you to enjoy. Our portfolio of work ranges from domestic kitchen, bathroom, bedroom renovations to large scale office refurbishments, loft conversions and extensions, all the way through to one-off bespoke furnishings. We offer the full service so you can relax knowing your home is in good hands from the initial planning process through to the day the keys are handed over to your new beautifully constructed home. Our number one priority is your satisfaction, assuring you of our utmost commitment and careful approach to every project (big or small) so that you can rely on excellent quality and craftsmanship. Design is also an integral part of our process; any assistance you require in terms of kitchen/bathroom design or decision making on any interior decoration, then we can be with you at every step of the way.
Relm were fantastic. I have done a lot of renovations over the years but our regular builders weren’t available and we had to get the job done on short notice. Relm were professional, helpful and most notably stayed on time and on budget. I wasn’t able to be onsite and they kept me up to date with photos and videos. They left the building site clean and tidy and I am delighted with the quality of the workmanship. I wouldn’t hesitate to use them again or recommend them to friends.
DRH plasterers have been operating since 2005 offering a wide range of plastering services. We offer a 7 day service working to the customers needs. Our aim is to to provide an excellent plastering service. And great value
Very good would recommend him to anyone very friendly,clean and tidy and very reasonable price, Overall very happy top job
A small friendly local builder that has undertaken many projects from bathrooms and kitchens through extensions, timber frame and new builds. Total projects can be undertaken from start to finish with local tradesmen.
Matt gave a sensible quote, stuck to it, worked hard and delivered a very pleasing result to both projects. Very happy with the two sheds he built. Nice bloke as well. Would defo use again.
An accomplished business where customer needs comes first. We are a dependable team with 25 years experience. Our aim is to attain positive communication with our customers as well as providing reasonable prices for all our clientele. Our specialties expand to various qualities, and we are profoundly able in achieving and carrying out plastering and rendering, painting, boiler installations, unvented cylinders, gas safe checks, bathroom renovations and all home improvements. Collectively, our main goal is to ensure our customer is content and that our work reaches their full expectations.
An appointment was rearranged for Lewis and his Adrian to come and give me a quote for my driveway. They arrived on time.
Ash The Plasterer
External Wall Insulation
Quality affordable plastering and rendering in the Loughborough and surrounding areas quality time served plasterer with years of experience from small patches to full house reskims all aspects of plastering and external rendering covered . Don’t hesitate to give me a call quotes are free if you require any plastering work or advice ?? Expertise in all aspects of plastering dry lining, skimming , skimming over artex , refurbs , rendering , tyrolean, sand and cement flat render , rough cast , through coloured renders , tyrolean , silicone render
YOUR MRH DEVELOPMENT LTD
External Wall Insulation
It's all about the fine finishes.
New roofs upvc guttering dry verge dry ridge repointing chimneys repointing walls rebuilding repointing lead flashing eco flashing roof repair fiber glass flat roofs rubber flat roofs torch on felt flat roof
Stoneview Paving & Landscapes
External Wall Insulation
If you would like a new driveway but do not know which materials would look best for your property, just pick up the phone to our experienced family run team who will offer you free advice and guidance on the many materials on today´s market. We have installed lots of driveways in your local area made from quality materials such as block paving, resin, tarmac and shingle. Our team can show you pictures of recently completed driveways in your area so you can get an idea of how your property could look with a brand new driveway designed and installed by our qualified and experienced team.
GPT BUILDING SOLUTIONS LTD
External Wall Insulation
We are a building and construction company which specialises in all aspects of building work whether you're planning a new build, renovation, or expansion. We can provide services and experience for the whole building journey, from concept to completion: • Windows • Roofing • Tiling and flooring • Painting (external and internal) • Groundworks • Carpentry • Electrical • Plumbing • Scaffolding erection All our workers are fully trained, and health and safety compliant. We’d be delighted to discuss how we can support your upcoming projects, big or small.
This is my test company
Core Install LTD
External Wall Insulation
This is a family run business which dates from 2017 ,but I do property maintenance for over 15 years already and we cover almost all the handyman jobs around the house
L.P.D Building & Plastering Contractors work to a very high standard and to customers satisfaction. We don t just build you a house , We build you a home.
Lee and his team were brilliant from the moment they arrived on site. The team of guys who were on site for the majority of the build were friendly, polite, clean and tidy and did a fantastic job with our new extension and patio. They were flexible with the plans when they needed to be and kept us informed throughout the build. I would have no hesitation in recommending LPD to anyone else... in fact I already have!
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