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One of the most cost-effective home improvements that not only adds value but keeps your house cosy in winter, is external wall insulation. We have an abundance of skilled external wall insulation companies on our books. Post your job for free and receive up to three quotes from our external wall insulation specialists.
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External wall insulation installers – Rated People
External wall insulation is a cost-effective home improvement for houses with solid walls.
According to the National Insulation Association, a massive 45% of heat escapes through the walls of houses with uninsulated solid walls. External wall insulation keeps your home warmer, adds value to your house and reduces energy bills, making it a worthwhile investment.
Installation involves applying an insulation material and weatherproof cladding to the exterior walls. The cladding that goes over the top comes in a variety of different finishes, including smooth, textured, tiled, painted or panelled.
This means you can choose a style that complements your house.
Are my walls solid or cavity?
External wall insulation is the best insulation option for older properties with solid walls. Newer properties generally have cavity walls that are best insulated with cavity wall insulation instead. There are a few simple checks you can make to find out which type of wall you have.
Age – properties built before the 1920s usually have solid walls, while properties built after this time have cavity walls.
Brick pattern – if you’re not sure on your property’s wall type, the brick pattern on exterior walls often gives it away. Cavity walls are usually built using bricks of a uniform size, while solid walls have an alternating pattern of full and half-length bricks.
Thickness – cavity walls are thicker than solid walls. To check how thick your walls are, open your front or back door and measure the wall through the door opening. Cavity walls usually measure over 30cm, while anything less is usually a solid wall.
Internal wall insulation versus external wall insulation
Solid walls can either be insulated internally or externally. Budget, severity of heat loss and the condition of your walls will determine whether internal or external insulation is most suitable for your house.
Exterior wall insulation cost is more expensive, but it will improve your home’s appearance and is generally less disruptive to install. Some redecoration will be required after internal insulation has been installed.
If you’re not sure which type of insulation is right for you, external insulation companies will be able to help you decide.
What are the benefits of external wall insulation?
- Reduces heat loss through walls.
- Reduces energy bills.
- Reduces internal condensation.
- Protects walls to improve longevity.
- Improves weatherproofing.
- Improves sound resistance.
- Improves appearance of your home’s exterior (curb appeal).
- Environmentally friendly.
Moisture penetration
While external wall insulation stops moisture penetrating your exterior walls, it can’t prevent moisture entering your wall internally. It does, however, reduce damaging internal condensation by warming the wall. This causes internal moisture to condense closer to the cold external air rather than on the internal surface.
How long will the job take?
On average, it takes 3 to 6 weeks to complete the work depending on the size of the house. It can take longer if your walls need any repair work or if the weather is very bad.
What preparation work will be required?
Before any work starts, your tradesperson will need to prepare the area. Preparation will involve clearing the walls and the surrounding area of any obstructions. Scaffolding will then be erected for the duration of the job.
Satellite dishes, hanging baskets, creeping plants and anything else attached to the walls need to be removed. Check with your tradesperson what preparation work is required and who’ll be carrying it out.
How much does external wall insulation cost?
Exterior wall insulation can cost anything in the region of £8,000 to £22,000. The price of the job depends on the size of your property and the condition of your walls.
In some cases, it may be possible to get a grant to help with the cost of external wall insulation as part of the Energy Company Obligation (ECO) scheme. Speak to your energy company to find out if you are eligible or contact the Energy Saving Trust for more details.
How much money will it save me?
While solid walls are more expensive to insulate than cavity walls, the savings that can be achieved on energy bills with this type of insulation are bigger.
Listed below are the average annual savings on energy bills after the installation of external wall insulation according to the Energy Saving Trust.
| Detached | £425 |
| Semi-detached | £255 |
| Mid-terrace | £160 |
| Bungalow | £175 |
| Flat | £120 |
The qualifications your tradesperson needs
Although there are no formal qualifications required to do the job, there are several courses and certificates available to achieve official recognition. These include a City and Guilds NVQ certificate or diploma in Insulation and Building Treatments, as well as short courses offered by product manufacturers.
Planning permission for external wall insulation
The finish you choose for the rendering will determine if your job requires planning permission. If the finish alters the appearance of the exterior of your house, you’re likely to need planning permission first.
If you live in a listed building or within a conservation area you will need to speak with your local authority. You also need to ensure all work complies with solid wall building regulations.
Insurance for external wall insulators
You should expect all reputable tradespeople to have public liability insurance as standard. This covers any accidental damage that may be caused to your property during the work.
Questions you should ask your external wall insulator
- Do they have any qualifications or certificates?
- Are they a member of the Insulated Render and Cladding Association (INCA)?
- Which decorative finishes do they offer?
- Will they install a vapour barrier to protect from moisture in the wall?
- Will they use full scaffolding?
- How long do they estimate the job will take?
- What preparation work will be required before installation?
- Is the work guaranteed and what are the details of the guarantee?
- Do they have public liability insurance?
We are a professional and friendly team we have over 25 years of experience in all plastering works, Been working on recommendations throughout ,we take complete pride on all our projects, and all have a great eye for detail , we push that extra mile for us and the customers to complete there dream. We also use a spray machine to paint and decorate and silicone rendering for the highest standard possible use GLM for the best and safest way forward
Absolute pleasure to have meet Grant and his team, rendered and painted my house to a high standard, left all areas clean and tidy, would not hesitate to use GLM again. Thanks again Grant. Lisa & Bill
With over 10y on to construction industry,we operate a small family business owner aimed to provide an high quality services across the trades we offer, We have over 5y experience doing painting and decorating works leaving behind smile and the best experience, From Tv wall mountings to removals, storage ,and refurbishment,we cover all aspects of works . For a friendly man part of the team on site ,please don’t hesitate to get in touch with us..
Fantastic experience - really lovely guys, great job and super reliable and professional. Look forward to working with them again soon
About Andrey's Property Services. Thank you for looking at our profile page here at Andrey's Property Services. We are a team of highly skilled multi-talented tradespeople and between us we can do pretty much all work required in your home to a very good standard. This can be confirmed by looking at our excellent reviews and pictures of our previous work. Some of the things that make us stand out from the rest - NO UPFRONT DEPOSITS We only ever ask for payment once the work is complete and you have had a chance to make sure you are totally happy with everything. WE DO EVERYTHING Why have multiple tradespeople or multiple companies working on the same job when we can manage the whole project start to finish and take responsibility and ownership for everything. REVIEWED & CHECKED We have been through numerous checks into our background by independent organisations including TrustATrader and others that you can find on our website Including criminal background checks, public liability insurance checks, necessary qualification checks. ALL WORK GUARANTEED At Andrey's we are so confident in the quality of our work that we offer a full one to ten year guarantee on any work we do, totally free of charge. This combined with our 1 million pound public liability insurance should give you full confidence in Andrey's Property Services.
Andrey has been in contact and is now going to rectify the problem and is re render in march 2026.
JJ Walker property development. All trade contractors. Design Build Deliver.
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.
We take proud in our work .our priority its our costumer.We undertake all kind of work from small to big projects.For a free estimate do not hezitate to contact us.
Very efficient
16 years experience in the rendering and plastering trade
Did a brilliant job on side of house, working in terrible weather, would recommend.
We a specialists EWI,K-RENDER, MONOCOUSH,GEDBRICK, BRICK SLIPS works. Our experience during 10 years. We use Licata+greutol,SPS envirowall, KRend,Weber,STO,Wetherby products.
Whilst fairly pleased with the work, the renderer (Anatoly), did not place scaffold back into existing location. A scaffold ladder was left hanging by a single clip. Bars and boards not returned closer to the building leaving huge gaps. Red brick dust has stained 4 days after completion. The disgraceful condition of the scaffold is gross in my opinion
Pioneer Building Consultancy was founded in 1998 and is based in South East London. We don’t just design and build new homes but we also refurbish, maintain and repair homes and regenerate communities, this is why we have become the nations first choice.
Cleos was reliable, polite and showed pride in the quality of his workmanship. He managed to get my kitchen worktop fitted to correct specifications and went out of his way to make sure that I was happy with everything and accommodated my situation considering that I was short on time. I would use his services again in the future.
Team of professional renders working together for over 9 years. No job is too big or too small for us. We use a wide range of insulation to fit your needs, but if you do not wish to use insulation we can only rend your house to make it look wonderful.
These lads were absolutely outstanding, what a pleasant change to find trades people who really do care about their work and do not cut corners. They were always on time, cleaned up every day, explained everything and were always friendly. I have no reservations in recommending them to anyone.
We are a team of qualified plumbers providing high standards work, industrial and domestic plumbing. We are looking for jobs in Luton area and surrounding. Get in touch to tell me about your home improvement plans I'd be very happy to discuss how i could help.Razvan
Lovely chap Great work Very reasonable price
10 years experience in the plastering trade . My experience ranges from large site work to individual houses. My specialities include solid plastering, artex removal and lime plastering.
Craig did a fantastic job of skimming the ceilings of 6 rooms of our home at the end of 2021. The finish was excellent, he turned up when he said he would, he was flexible when we needed to move the date, he took care to minimise the mess and the price was competitive. Would use again and highly recommended.
IMD&G is a growing company that we started in the U.K.. We offer amazing gardening services, with professionals, all our staff are competent and trained. We can offer our services for anything you require, gardening wise. If you would like to use our services please feel free to exept the quotes and leave it on me
Great communication. After photos show hard work. Great results. Would recommend.
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.
Hi I’m Andrei and I have a good experience in extension loft conversion block paving,driveway,decking,brick work,fencing,landscaping and more.
Andrei was very professional, started the job on short notice and finished jt just as quick. Communicated all the way through the work, and was done to a high standard. Would recommend him to anyone.
C C D General Building is a company designate to take care of your job from the quote job to the end of it
Christian reversed the swing of the door for me in a room. He quoted quickly and his price was fair. He came quickly and did the job well. Would like to work with him in the future
As 10 years experienced with my team of great builders to provide my clients with the Design and Build service: * Extension Builder * Loft Conversion Specialist * New Home Builder * Conversion Specialist * Restoration & Refurb Specialist * Paint & Decoraters * Plumbing & Heating * Kitchen Fitter * Bathroom Fitter * Flooring Fitter * Tiler * Electrician * Insulation Installer * Bricklayer * Groundworker * Architectural Designer * Plaster * Roofer * Garden, Landscaping & Fencing
Very happy with the gardening work. Also various other work around the house that he undertook for me. Very accommodating. I will be using this company again
Welcome to Iosip Construction, where craftsmanship meets dedication! Founded by Ioan, with over 16 years of construction experience in both England and Romania, we take pride in delivering exceptional quality and unmatched expertise in the construction industry. At Iosip Construction, we are committed to hard work, ensuring that every project is executed with precision and excellence. The services we offer include: - Extension construction - Loft conversion - Porch construction - All aspects of Rendering & Plastering - Tiling - Full House Refurbishment What sets Iosip Construction apart is not only our wealth of experience but also our unwavering commitment to customer satisfaction. We strive to make the construction process enjoyable for our clients by providing transparent communication, reliable timelines, and, most importantly, by ensuring that you are delighted with the final outcome. Our experienced team of five professionals is dedicated to delivering high-quality results in each of these services. From expanding living spaces to enhancing the aesthetic appeal of your home, Iosip Construction is your trusted partner in construction excellence.
Excellent tradesman with very good skills and very reasonable. The quality of the work is very good and people are also trustworthy.
Sweet Plastering & Carpentry is a small local business who pride themselves on carrying out a high standard of workmanship with a reputation of great customer service. We carry out all aspects of building work internal and external by qualified tradesman.
Very good rendering and plastering. Good team, pleasant to have around. Got the job done in good time.
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.
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