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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.
JJ'S Landscapers
External Wall Insulation
JJ's Landscapers is a reputable landscaping company that brings over a decade of valuable experience to homeowners. Our primary goal is to create and maintain breathtaking outdoor spaces that surpass our customers' expectations. We understand the importance of personalized service, which is why we prioritize our clients' visions and requirements above all else. Our dedicated team of professionals excels in a wide range of landscaping services, including lawn maintenance, garden design, irrigation systems, hardscaping, and more. By hiring JJ's Landscapers, homeowners can expect meticulous attention to detail, timely project completion, and an unwavering commitment to customer satisfaction. We take pride in transforming ordinary properties into stunning havens, enhancing curb appeal, and providing a tranquil environment for relaxation and enjoyment
Hello, and welcome to R B property maintenance & roofing. We are a small independent family run property maintenance company. We cover all roofing aspects from slipped slates/tiles to a complete new roof to landscaping We have been in this industry for more than 25 years. Rest assured you are in safe hands
Very quick response and job completed speedily and advise given without pressure on other work we could undertake
Over 15 years experience in building jobs Specialties: Plastering External rendering Silicone colour render Bathroom refurbishment Painting General building works Nvq2 building treatment
Both Andrew, Steve and kyle have been in partnership over 2yrs and both have over 25 yrs building experience. we specialize in complete house renovations and have great pride on our quality of workmanship
We had water damage to our bedroom ceiling and down stairs wall. Kyle came out and sorted the problem. From start to finish Kyle was absolutely incredible nothing was too much trouble he offered friendly advice and gave an explanation as to everything he did. I can’t recommend him enough the work he has done is top notch.
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We are a family run business with over 40 years experience in exterior weatherproof coatings and renders. Our 2 coat rendering system is available in an extensive range of colour choice which suits any property style or customer preference. We are able to offer our virtual quoting system without initially visiting your home with us also being able to attend your property to discuss your options if required. We only use the finest products and Wethertex have been manufacturing in the UK for over 45 years with their high-performance wall coatings. Our confidence in the products makes it effortless in offering our 15 year guarantee. An insurance backed guarantee is also available if required which many local “one man traders” are unable to offer. We have carried out works for thousands of satisfied customers over the years and can provide example properties in your area for reference purposes. We Specialise in:- . Two coat silicone render system in a colour of your choice . Render repair system in a colour of your choice . Insulation boarding with polymer render finish in a colour of your choice . Stopping penetrating damp Our surveyors and office staff are always on hand to offer advice and talk you through the services we offer. Insurance quotes (there is a £250 returnable charge upon receipt of deposit) Our minimum order value is for 9x3 metre (30ft x 10ft) coverage Finally, our Rated People ratings speak for themselves, many of which are 5* **Please note we are unable to offer Internal plastering, Internal painting or decorating**
I recently had some render work done on my house by Spraytex, and I couldn't be happier with the results! The quality of the work is outstanding, and it has truly transformed the look of my home. Debbie & Siobhan provided good customer service throughout the entire process, answering any questions I had. Additionally, the work area was left very tidy after each day, which I really appreciated. I highly recommend Spraytex and Gaz (Installer) for any rendering needs!
LD & Sons Roofing LTD
External Wall Insulation
We are a family run business for over 20 years, and we take pride in our work. I have. Reviews on Bark, but im new on this platform. Thanks
Rm property maintenance is a family run business with nearly 20 years experience behind us offering you a wide range of service at affordable prices specialist in all Upvc products and roofline products guttering repaired. And renewed
Fixed loose corner on concervatory on same day as quoting for the work, would recommend.
The Four Builders
External Wall Insulation
The Four Builders We provide services to the highest standards. We will make it unique and with the best quality. 10+ years of experience 24/7 support if you call our office 8 different expert teams of 4 people in each team 15% off if you are a new customer!
LP Services
External Wall Insulation
Pearlcontracts is a small firm based in Montrose Angus with two teams of professionals for your home improvements.
First class job by John and the guys. Turned up on time to view the job, very knowledgeable and thorough assessment. Work completed to our agreed timescale and to a high standard, photos supplied to show before/after, important on a roof! Reasonably priced and very pleasant. Would highly recommend - in fact just had them back to do some more work.
We are a highly professional outfit with a small base of quality tradesmen to provide services of painting and decorating and all aspects of building work and offer quality and service to all customers at a good competitive rate.
Completely transformed our bathroom. Ian and his team have done an amazing job. From start to finish, talking us through what was being done. Helped us pick out a bathroom suite. Can't recommend them enough.
I am builder I have been working from last 9 years in this building industry And trying to provide quality work to british standard I can do any kind of building job If you need my any help Feel free to contact me
CONNAUGHT DRY WALL & PLASTERING COMPANY LIMITED
External Wall Insulation
Founded in 2001, Connaught have been in the construction industry for nearly 2 decades. Operating in London and the surrounding areas, we've earned our reputation in the industry by delivering the highest quality standards of work without compromising on value. We take great pride in our work and we aim to exceed our client expectations with every service we offer,
Florin Alaman
External Wall Insulation
My company is new I'm builder
Plastering service Over 10 years experience in Plastering Rendering ( k render, cilicone render, sand & cement.) Dry lining. Always ready for new projects Free quotes, we can provide you references if it's required!
Had 2 bedroom ceilings plastered by Nuri. Booked in at short notice, he called the day before to confirm the job and timings. Arrived promptly and worked efficiently and without too much mess. Polite and friendly manner Would definitely use again.
Rjplastering, covering light building works also with a combined 50 years experience is focused on leaving top finishes within internal domestic plastering work such a float and setting walls for bathrooms etc, dry lining and normal or abnormal skimming. Also machine applied Renderer using monocouche and thin coat render systems, as well as sand and cement. With 10 strong years experience We take on any of you’re plastering needs big or small! We work to our exceptional efforts giving you the best results. Fully insured Check out Rjplasteringservices.Co.uk
They made a competitive quote but I did not proceed for personal reasons. Very pleasant people.
Noades Property Services
External Wall Insulation
Noades Property Services covers the full range of property work — plastering, rendering, general building, patios, and landscaping — across Hertfordshire, Cambridgeshire, and Bedfordshire. Whether you need a smooth interior finish, a full extension, or a garden transformed with a new patio, we bring the same standard of care and craftsmanship to every job. We pride ourselves on reliability, clear communication, and quality that lasts — no job too big or too small.
J COSTELLO BUILDING
External Wall Insulation
I have been working in the trade for over 15 years right through from drainage and groundworks, to plastering and completion. In more recent years I have mainly focused on small one off, bespoke new build houses where detail and client satisfaction are paramount.
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External Wall Insulation
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