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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.
A2Z Landscaping LTD
External Wall Insulation
A2Z Landscaping LTD delivers high-quality driveways, block paving, landscaping, fencing, artificial grass, and patios. With expert craftsmanship and attention to detail, we create stunning outdoor spaces tailored to your needs and built to last.
Byko is a family owned business . Our workforce is fully qualified and experienced at working in domestic and commercial properties and carrying out construction services, property maintenance and installation work for our customer.
Excellent, can't praise them enough. Professional job.
Leszek Gawczynski
External Wall Insulation
Proskill construction offers general contracting services and is mainly located in kenton, Harrow. Our mission is to perform for our customers the highest level of quality. IN Our Work We Pride, Quality Is What We Provide
Very pleasant and reliable. Came on time for quote, provided quote in timely manner, we arranged the date and John and his mate came and did a lovely job of our patio: breaking up old concrete, laying new, then laying tiles. The work was clean and tidy and the tiles look nice.
A joiner by trade but an experienced tradesperson in a number of home related areas including kitchens, bathrooms & maintenance
Super job. Did the plastering for my whole upstairs attic conversion. Great worker and easy to work with. Highly recommend.
We are a family run business who pride ourselves on quality workmanship and customer satisfaction, trading for 10 years now. In that time we have completed many projects, large and small, which have included commercial and residential ones.
Very professional. Arrived on time, immediately started putting down floor protection from the front door right the way through to the studio room. Said what time they would be finished and actually finished a little early. Did a good job of cleaning up after. And as for the plastering, it’s some of the best I’ve seen! Absolutely fantastic. I would thoroughly recommend them, and would use them again in a heartbeat!
RPIOS LIMITED
External Wall Insulation
Our company is made out of hard working individuals with more than 30 years experience in the construction industry. We are specialised in loft conversions even though we can do any construction related work in any buildings. We have experience in loft conversions, painting, tiles placement, shutter carpenter work, brick work, laminate flooring, insulation placement, kitchen and bathroom fitting, plasterboard placement and many more. As we are new to this website we would appreciate some positive feedback after finishing the related work.
TM Graham
External Wall Insulation
25 Years experience in all aspects of plastering including external render applications. Quality,Honesty,Efficiency,Respect and Take great pride in my work
JK CONTRACTORS
External Wall Insulation
Our company is a well-established building and contracting firm with years of experience in the industry. As a qualified electrician and builder, we offer a wide range of services to meet the needs of clients. With our expertise and in building contracting work, we specialize in various areas such as brickwork, block work, extensions, plastering, electrics, plumbing, carpentry, and joinery. This comprehensive range of services allows us to handle every aspect of a construction project, ensuring a seamless and efficient process from start to finish. Our years of experience in the field have equipped is with the knowledge and skills necessary to deliver high-quality workmanship. We have a deep understanding of construction techniques and industry standards, ensuring that every project is completed to the highest standards of quality and safety. In addition to our practical experience, we have also invested in education and training to stay up-to-date with the latest advancements in the industry. This commitment to continuous learning allows us to incorporate the latest techniques and technologies into your work, ensuring that our clients receive the most innovative and efficient solutions. Overall, our company's combination of experience, specialties, education, and training positions us as a reliable and skilled provider of building and contracting services. Whether it's a small renovation or a large-scale construction project, clients can trust your expertise to deliver exceptional results.
DAVE MORRISON PLASTERING SERVICE
External Wall Insulation
25 years experience in plastering and rendering I take pride in offering a clean and tidy job at sensible prices
Kandy Construction Cotswolds
External Wall Insulation
As A seasoned tradesman I pride myself on the quality of work I deliver in all aspects of any building project. My experience and expertise gained through many years in the business are an integral part of the service I provide. From extensions, renovations and everything in between including any smaller jobs, I can help you to plan, budget and turn your plans into a reality, my quotations are detailed and I always try to be competitively priced, all my customers are always very happy with the end result.
Michael Tolson plastering
External Wall Insulation
At Michael Tolson plastering we have being serving the public for the last 18 years. Specialising in domestic works, we offer all ranges of plastering and much more. From full damp proofing to a small plaster patching. We can offer full bedroom/living space conversions, plastering, skirting bords, new doors, the full works. We pride ourselves on a job well done and go above and beyond to be clean and professional at all times. We hope to help you on any projects you require us on and will help and work with you every step of the way. Regards, Michael Tolson Plastering team.
Skilled carpenter in Birmingham, specialising in all aspects of carpentry and joinery.
Very hard working guys. Good job, not most cheapest but very nice and polite lads. Would use again. Gill
POWERHOUSE CONSTRUCTION
External Wall Insulation
Hi, We're powerhouse construction, We’re new to rated people but certainly not new to the trade. We're a small firm based in East Sussex with 16 years experience. We take old and run down spaces and turn them into awesome family homes. There's no need to sell your property, just extend or renovate to make more in equity We're great at maximising the potential. I hope we build your dream living area very soon. Typical size of job would range from a small renovations to big extensions.
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We are a family owned business specialising in weatherproof wall coatings and render repairs and finishes. We have been refurbishing wall exteriors for over 35 years, providing a high quality service, all of our work is priced fairly and guaranteed. Our wallcoatings are particularly effective in coastal areas and on wall surfaces that open to wind driven rain We also offer Dryzone treatments to combat rising damp issues
We can't recommend Arbiter Coatings enough! Bill was extremely helpful right from the quote stage to completion of the work. He offered us a solution to covering up the fake stone front of our home to give us the exact result we had hoped for when no-one else could. Don't be put off if you are a distance away from where Bill is based as Arbiter Coatings travelled a long way to us and had other jobs in our area, We can see why these guys are in high demand.
JBS HOME IMPROVEMENTS LTD
External Wall Insulation
At JBS Home Improvements Ltd, we pride ourselves in completing work to a high standard and stylish finish. We are regularly praised by our customers for our communication throughout projects and our employee's excellent manner with customers. All of our team are uniformed, insured and drive sign-written vans. We employ a team of highly skilled, experienced and local tradesmen for each trade. This means that we don't subcontract; so you know exactly who is going to arrive at your home each day. We specialise in being able to project manage your build, from the initial planning and designing stage, right through to completion and the final coat of paint. All of our work is guaranteed with our own 25 year JBS Home Improvements Guarantee. As Registered FreeFoam Installers, we also offer a 50 Year Manufacturer Backed Guarantee. So you can rest assured, you're in good hands with the professionals.
Pegasus Property is a local based business that specialises as being a General Builder focusing on Kitchen & Bathroom supply and fitting but also general maintenance for both residential and commercial clients through to an Audio Visual Integrator installing PA systems, Digital Signage, CCTV and Access Control. With almost 20years experience of offering solutions to meet a clients budget but exceed their expectations we hope to work with you in the near future.
We at K&M property maintenance cover all types of roofing ,Roughcasting & building works all work is finished to a high standard .
Job well done
P.A.S plastering pride ourselves on Quality and customer satisfaction . Also accredited plasterers by British Gypsum . With over 30 years experience we aim to give our clients the complete professional job. We cover all aspect of plastering also K rend / monacouche coloured renders
Absolutely fantastic. No problems and did a fantastic job.
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