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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.
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Hello, we are Trader Brothers Ltd. We offer the highest quality service at a competitive price, our staff have several years of experience and are here to help and advise you to convert your house into the home you always desired. To book in for a free quote you can contact us via email or mobile and we’ll get back to you as soon as possible. Services Trader Brothers offer: Painting and decorating General and bespoke Joinery Kitchens and Bathroom specialist Flooring and wall isolation All aspects of flooring: laminate, tiles, hard wood
Arrived at appointmented time, with all necessary precautions taken during survey of job. Estimate was a fair price. Detailed and professionally prepared.
Roofing contractor . Other work undertaken
Renovate your home with us. "Renov8 My Property Ltd" We are a well established trustworthy reliable and professional company with over 15 years experience in the trade with an eye for perfection and attention for detail we thrive on customer satifaction. Our customers rate us highly for our ability to stick to deadlines and for the quaity of our workmanship. We provide a professional service from the initial free quotation to the end professional finish. We look forward to helping you Renovate your home.
Jason was such a polte nice fella as were all the different tradesmen that came and did my bedroom but Jason was the person i had most dealings with. I gave them a blank canvas to work with and gave them just a few instructions so it was all there idea what they did and i have got to say what a great job they did. The work was all done to a high standard and they cleaned up everyday at the end of shift. The price was good and i must say would highly recommend them to anyone.
Hello my name is George , I start construction in 2014 ! What I can tell you if you need a good handy man in your house you can contact me ! I can help you whit New kitchen New bathroom Plastering Tile Flooring Painting and decorating Gardening I have my own gas engineer And electric engineer My friend have windows company base in Dunstable ! Whit respect George !
Great paint job, done on time and to schedule on a difficult wall to access at height. 50% payment before and 50% on completion. Very friendly and open. Would recommend.
24 YEARS EXPERIENCE ON Builder Contractor With my team we did from Garden Landscape all the way to new build yet making sure Clinet saves and reaches his goal on they projects. We are qualified Gas safety Electrical Plumbing Solar Heat pumps We specialaise on: Loft conversion Bathroom Kitchen Extensions Paiting and Decorating Plumbing Roofing Garden Landscaping Insured and insurance backed guaranteed services
Remi was reasonably priced and I'm happy with the painting in my living room, he also took a quick look at my bathroom lighting at no extra cost
We can offer with confidence a professional and innovative service . Regardless of size or difficulty we will fulfill and exceed all criteria within your budget and time allocated.
Hello, my name is Ronnie and I am builder, born and bred in London, I started off nearly 30 years ago working with my dad, and have now taken over the business with my son, I am fully committed & driven to provide outstanding quality at a fair price. I am a fully qualified plasterer by trade, however over the years my skills have grown and grown in other trades also, giving me the opportunity to take on bigger work i.e. extensions, landscaping and full property refurbishments, to include from design to fit kitchen and bathrooms, however there is no job to small and welcome all types of plastering and building work. all my work is fully insured and I pride myself on being extremely polite, very clean and tidy and unbelievably punctual and reliable. many thanks for taking the time to read my profile and viewing my previous work pictures
Excellent professional job done by both Dan and Ron. Very responsive over the phone and helpful. Would definitely recommend and use them again.
hello I have 15 year in the trade I am a multi skilled tradesmen who takes pride in what I do I love my job I work on a basis you not happy with my work you don't pay simple as that I am fully insured and vetted
Did not turn up.
High quality and professional friendly service
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
I'm experienced handyman skilled painter & decorator , plaster inside ,external render outside ,key render, tiling, kitchen/bathroom floors general builder works
Landi did a great job at short notice and for a reasonable price. I will certainly be using him again for future jobs.
Our Services: skimming/dry lining/rendering/tilling/brickwork/blockwork/driveways/patios/groundworks/garden renovation/bathrooms/extensions/conversions/renovations. NO JOB TOO SMALL! With a joint experience of over 25 years in construction. If you want honest, reliable tradesmen, who pay attention to detail & take pride in their work, look no further.
Fast, efficient and quantity! Definitely will take his service again.
Pro master gecko is London’s leading independent service company with a wide skill set and highly experienced tradespeople to support all your service and maintenance needs - plus a team of commercially qualified trades operatives for business customers. We complete a large number of jobs a year, with over 65% of the work coming from returning customers. Pro master gecko is fully insured and provides a reliable service with great value . Our transparent charging system is monitored on a regular basis to ensure our rates are always competitive. Works undertaken Damp Proofing plastering Painting Sound proofing Water damage ceilings External sand cement rendering k-rend Polished plastering General building works Be assured Pro Master professionals complete all jobs to a very high standard. City & Guild certified Safeguard Europe Damp Treatment Accredited K Rend Certified applicator Complete insurance coverage
The work completely was of a very high standard with immaculate attention to details. Jerry was punctual from the survey stage to the end of the work. He sorted little snags with the wall, separated the work area with a plastic sheet so the dust was minimised. After each day, my home was left clean and the job was progressing well. The end result looks great and no issues so far. I would recommend them 100%
I have been working in London since 2007, in those 16 years I have done plastering, wooden flooring, wooden fencing, ceilings and much more. I am new to Rated People, however I have the experience and can provide reference for previous work upon request.
Vasile replastered two ceilings in one day. He did an amazing job, and kept everything clean leaving the rooms spotless. Would definitely recommend. F.
I have been working in the trade for 20 years specialising in : Loft and Garage Conversions, Garden Rooms & Home Improvements. Our team deliver all projects to an outstanding finish & pride ourselves on our attention to detail. Please feel free to get in touch if you have any questions or if would like to discuss your job further. I am happy to help where I can. Adam Windsor
We got 6 walls newly plastered. 2 of the walls had unevenness. Very poor workmanship with evidence to back up claims. Adam has paid some money back to us to fix the issue but it should of been done properly in the first place.
Joinery and building specialist with 19 years experience . Willing to take on any job big or small and work always done to a very high standard . Available 24/7 and willing to work after normal working hours to give the very best service possible to our customers. Very flexible and happy to help in any shape or form . All trade’s supplied All aspects of joinery and building Extensions Conversions Renovations Attic conversions Flat roofs Roofing Kitchens Bathrooms Windows/doors Flooring Fencing Decking Bespoke joinery/cabinet making Summer houses/sheds NO JOB TO BIG OR TO SMALL / ALL TRADES SUPPLIED
25yrs+ TIME SERVED PLASTERERS SPECIALISTS IN ALL ASPECTS OF PLASTERING & RENDERING HIGH WORK STANDARD EXCELLENT CUSTOMER SERVICE
Small family run building company with over 40 years experience over 2 generations as a premium general building company. All types of building work carried out to the highest standard. A one stop shop for all your building needs right from the design and planning stage to completion. Joinery, roofing specialising in flat roofs Building and Plastering A wealth of experience in remodelling and renovations, extensions and sunrooms. Landscaping and paving. All areas covered. Fully insured, trained and certified tradesmen
We have 36 years experience in all aspects of Painting & Decorating, Tiling , Rendering & Plastering & Bathroom and Kitchen Fitting We pride ourselves in creating the perfect finish for the customer, and work the the highest professional standards at all time. We are clean workers and our aim is to complete jobs to 100pc customer satisfaction. We offer competitive rates, and are always open to reasonable negotiation and like for like genuine price match. The overall ethos is to create a job situation where everyone is totally happy and enjoys their newly enhanced property. We undertake other types of work including bathroom and kitchen fitting, plastering, joinery and small build works. Thank You for taking the time to read about us and hopefully we will look forward to working with you. All the best Painted By Hand
JL plastering & Venetian Design, a qualified, professional and quality service in all aspects of Venetian plastering/Design, plastering, rendering and other building work.
Unable to quote.
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