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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.
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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.
BNT Construction ltd offers a full range of construction services. We take pride in offering competitive services at competitive prices. Services ranging from Groundworks to full house refurbishment or home maintenance ,drainage , basements , piling . Also we can pride ourselfs as the fastest and reliable builder as per customer satisfaction . Latest extension completed from the aprovals of documents and council agreement 4 and half weeks thats based on demolishing the existing build and rebuild the entire extension with fitted kitchen underfloor heating etc. Quality and profesionalism are and always be a priority !!!! Team BNT
Excellent service! Will definitely use again!
An builders & refurbishment We do all aspects off building trades To a good standard We have good team players from blokes to women Thank you so much for looking and using our services
Very efficient service from the initial contact to finishing the job. Polite, professional and efficient. I would highly recommend. We definitely be using them in the future.
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Here at Weathertite Constructions we cover a wide range of building roofing extensions conversions damp problems drainage with camera inspection, garden design with patios driveways and walls. James has 20 years experience Lee has 35 Carl has 10 we are here to provide a good service information and a very reasonable quote kind regards lee
Did a great job considering our budget and practicalities. Removed all waste and left the roof looking in much better condition.
Atom Design & Build LTD
External Wall Insulation
With over 25 years experience Atom Design and Build are the perfect choice for your next project. With an inhouse team we cover all trades from the ground up foundations through to the final touches with the decorating. If your looking to undertake a New Build, Extension,Loft conversion, refurbishment or even just a new kitchen or Bathroom please get in touch and we will see how we can help you. We pride ourselves on doing things right and doing things well. Fully insured and a multitude of glowing references from previous clients.
Had a bedroom door fitted vert good
Choose To Build Ltd are a hard working and friendly team that have 15+ years experience. We specialise in refurbishments and new builds. We have taken on and complete a range of different projects such as loft conversions , rear and side extensions and all internal building works. Choose To Build undertake any jobs big or small.
Adrian the owner was very helpful and understanding the job was perfectly completed The estate agent who looks after the flat for me was very pleased and has added Adrians company to their list for recommendations to other landlords The bathroom looks very modern and has added value to the property I would recommand Adrian for a job well done
It’s more than 10 years experience on this trade . Pro Qual Level 3 NVQ Diploma in Insulation and Building Treatments External Wall Insulation Boarder Brick Slips and Finisher There are many of the Reasons why to choose me . High Productivity Attention to details Competitive In Trade Prices
Brilliant work from Florian. Plastered a wall and part of a ceiling in a day and left it looking brilliant. Quick turnaround and reasonable price. Would recommend.
LITA CONTRACTORS LTD We are a family owned construction company with over 10 years of successful commercial and residential building projects. Based in London, we help clients with all kinds of construction needs, with existing plans or brand-new designs and solutions. Some of our services include: - Ground work - Drainage - Basements - First Fix & Second Fix - Kitchen & Bathroom Fit Out - RC Frame & Steel Frame We are specialised in delivering reliable and best quality services that will last a generation.
Very considerate and reliable and also Did a very good job in a short space of time
ALL -IN-ONE PROPERTY SOLUTIONS Hi there! I offer fair prices and complete property services: building, kitchens, bathrooms, flooring, plumbing, electrics, plastering, fencing, gardening—everything your property needs. I handle both small and big projects, so don’t hesitate to contact me for any job! Thank you
Versatile Renovations, one call does it all from your exterior coatings, building, and internal renovations needs.Versatile Renovations was founded in 1994 as an all trades company.a one-stop shop for all your home & properties needs
Received an immediate response to a leak that had become critical on New Year's Eve. John & team came out straight away, put measures in place to prevent the situation worsening and gave a very thorough assessment of the job at a good price. As soon as my insurance claim was granted the work was completed quickly. The leak was not only remedied but the bathroom plumbing restored to a much more reliable and secure standard. I can highly recommend Versatile Renovations.
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.
JH Roofing & Building
External Wall Insulation
JH roofing is a family run business with Taylor tradesmen to meet your needs we do a way of conservatory changeovers we also damp proofing and all aspects of property maintenance for a free no obligation quote dont hesitate to get in touch. Thank you for looking.
All Phase Construction has an established reputation for providing a high quality finished product. We have a team of qualified and skilled tradespeople who regularly work for us, as well as our own preferred electricians, plumbers, decorators etc. We take pride in completing works with the least disruption to our clients, ensuring that we provide support every step of the way, appreciating the requirement to complete each project on time and within budget.
We engaged Simon and his team to remove a supporting wall, thus opening up the kitchen into the dining room. From the start, Simon was knowledgeable and offered helpful insight. We were provided with a detailed and fair quote. Work was planned at a time to suit us, and was completed to a good standard and on time. Communication throughout the project was excellent. We would highly recommend this company and would not hesitate to use them again.
Sinevir Construction is your trusted partner in construction with over 15 years of experience. We offer a full range of services, including plumbing, tiling, bricklaying, plastering, carpentry, bathroom installations, and building homes from the ground up. We guarantee high quality, adherence to standards, and timely project completion. Our team of professionals uses the best materials and advanced technologies to ensure durability and reliability. We also provide competitive prices, offering an excellent balance of quality and cost. We value open collaboration and consider all your preferences at every stage of the project. Clients choose us for our professionalism, accuracy, and commitment to quality. With Sinevir Construction, your construction dreams become reality, backed by superior results and the best fair pricing.
Cannot rate this company highly enough; they were brilliant. The quality of the work was great; they took pride in what they did. They came and quoted, and provided a clear statement of work on what we agreed. They completed the work quickly. Turned up when they said they would, and if they couldn't, they let me know. Really good communication. They were so polite, courteous, and just generally really nice people to have in your house.
Top Branch tree services
They caused a gas leak, they went door to door to all my neighbors trying to quote for garden work. They took my neighbours tools and used their water without permission - that’s trespassing. They left mess in my garden. They did not do the work as agreed. Very disappointed
21 years experience in construction.Attention to details from the start of your project right through to the end
Punctual and efficient. Good job done
Orchard Roofing & Guttering
External Wall Insulation
We are happy to pronounce or company Orchard roofing and guttering we undertake minor repairs to major overall complete new roofs new fascia boards guttering to Minaur repairs such as ridge tile repair chimney repair gutter fascia board repair we offer guarantee with all the work with a certificate in hand on completion ??? all the material is sourced from main suppliers. We use high-quality wood treated up-to-date technology regarding breathable member and felt new galvanised nails all up-to-date material that will keep your roof nice and dry. ?
TCNR
External Wall Insulation
My name is Jordan Payne. I’ve been a plasterer/ render for 4 years now plus another 2 years of doing my NVQ in collage. I’ve came across all sorts of jobs from big to small and easy to difficult. I’m looking to satisfy all my clients with no excuses as my reputation is my life. Most of my career has been based around colour render, K-rend, parex and etc but I am also highly experienced with all interior work.
Did not use JP plasterers
General home maintain and hause improvements. working with highest quality to make sure all my costumers are happy of me.
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