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Find an external wall insulation specialist

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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Take a look at our External Wall Insulation specialists profiles, read reviews and request quotes directly.

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Make your home as comfortable and attractive as possible and get on with living.There's more to life than decorating.If you looking for help,solutions to make your interior design ideas come alive I'd be happy to support,advise or simply do it for you.

Latest homeowner review

Reviewed by ROBERT on 8/5/2019

Jimmy and his team were first class, excellent standard of work. Also clean and tidy as the job progressed.

hi welcome to my company , ive been in the building trade for 15 years with a vast experince in the building and tree surgey/landscaping industry,all my work is always carried out to the highest of standards to over exceed to customer expectations

Latest homeowner review

Reviewed by Philip on 4/5/2020

Darrel and his team did an excellent job in removing old rotting deck and rebuilding it th a very professional standard. They work hard from eary morning to the evening. The finished job was amazing and overall deserved the 5 star rating for all areas. Highly recommended.

I'm a fully qualified plasterer & builder, working on old and new residential properties. We specialise in small & large extensions start to finish, new porches, full garage conversions, new bathroom refit’s and conservatory's. All plastering and building work undertaken. No job too big or small. Always work in the cleanest safest way possible. Top quality assured. Free quotes and advice.

Latest homeowner review

Reviewed by Alan on 2/3/2019

These two experienced and very knowledgeable craftsman took time at every stage of the work to make sure that the end product was what we wanted. Advice was given on the cheapest way to keep cost down and still maintain the high standard of work. Following the completion of my work these tradesmen have done building work at my daughter’s and also my mother in law’s homes. Very pleased with the work and would certainly recommend them for all types of building work.

With over 20 years experience of working within the general building trade, RCB Group has earned a reputation as having a quality driven approach. We pride ourselves on the quality of our workmanship, whether it’s a small or large project, we’ll ensure that every project is completed to specification. It’s this focus on the details that builds trust and confidence in our services and why we’re considered one of the top builders in the South East of England - just check out our feedback! Our fully insured services start with a comprehensive estimate to ensure that costs are controlled. We only work with the best, most experienced sub-contractors, as well as our own staff, as this ensures a reliable and trustworthy construction process. Some services we provide; Extensions/conversions New builds Loft conversions Refurbishments And much more, please click here for our full list. We have worked with high-profile architects, surveyors and trade specialists and an expert hand completes every building project. Whether you require painting & decorating, repairs, extensions or renovation, you can be assured that our team of builders will provide the very best service, using state of the art equipment and materials all to a personalised quotation that is concise, fair and will not break the bank. Whether you need a loft conversion, office refurbishment or bathroom fitting, call, email or text us today and we'll be in touch. We'll make sure we look after you.

Latest homeowner review

Reviewed by PETER on 6/5/2020

All work undertaken to a very high standard and within quotes provided.Nothing was too much trouble which was brilliant for us. They offer a vast variety of services, from house extension to kitchen fitting, as well as plumbing, electrical jobs etc. Their communication was incredibly clear as the build progressed and any questions we had, were dealt with effectively. Any extra tasks we requested were always accommodated and all finishes were completed to a very high standard.

i have over 30 years experience in the construction field, from new bathrooms to fully fitted kitchens which includes tiling,painting & plastering. I have worked for the council & now run a very successful business.

Latest homeowner review

Reviewed by Pascal on 18/11/2019

Great work, landlord was also satisfied

I have been tiling and plastering for over 20 years.13 year my own business .Very reliable person who will treat your job like my own house.All aspects of tiling and plastering .From fit only or full bathroom rip outs. Plastering skim coat. Atrex removal

Latest homeowner review

Reviewed by Gill on 18/12/2019

Martin did an excellent job plastering my room to a high quality. Great value and prompt to provide quote and carry out the job. Very pleasant and I would highly recommend

Hi i am a local plastering company established in 1994. I am time served and have been in the trade for 32 years I have extensive experience in all aspects of internal and external plastering damp proofing and decorative plastering as well as tiling and floor screeding

Latest homeowner review

Reviewed by nicola on 6/5/2020

Great work and would certainly recommend to others and use again.

Latest homeowner review

Reviewed by Chris on 19/5/2019

Clean worker and great results

Supreme Plastering Services LTD Offers a wide range of services varying from, Plastering Rendering, Dry lining. Myself and my team have over 16 yrs or experience. First Started off in London City working on luxury apartments to high standards. We are very professional and produce high quality work. We have top quality equipment to delivery top quality finishes. Once the work is completed we will also make sure the property or location is left clean. We also concentrate on time keeping and producing high quality finishes to a set time so your project will also be delivered on time.

Latest homeowner review

Reviewed by Martin on 17/5/2020

Render work was carried out promptly, efficiently and finished to a very high standard. I would certainly recommend Adrian and the team to anyone looking to render their home.

DM Construction's core business is comprehensive refurbishment services. We are a dynamically developing company from Southend on Sea. Thanks to the experience gained, we provide the highest quality renovation and construction services. Our professionally selected team of qualified employees guarantees reliable work performance. DM Construction company in the field of modern interior renovations and refurbishments, helps the investor to choose the right renovation technologies. We hope that our proposals will meet with your interest. Bearing in mind the well-being of our clients, we are always ready to help in the field of technical solutions and we are happy to advise you in case of any questions. We invite you to familiarize yourself with our offer and use our services. Refurbishments - Maintenance - General Building

Latest homeowner review

Reviewed by Andy on 30/5/2020

Very good, well priced, good quality and would definitely recommend. We had our driveway done by DM Construction.

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What type of tradesperson do you need?

What type of job is it?

External Wall Insulation specialists - what you need to know

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?

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How our service works

  1. Create a job - it's free

    We'll connect you with the right tradesmen, from over 30 different trades.

  2. Get quotes

    Up to 3 tradesmen can provide a quote, but on average you'll get 1-2.

  3. Check ratings

    Look at each tradesperson's profile to see their ratings and reviews.

  4. Pick a tradesperson

    Use our homeowner checklist for extra tips on choosing a tradesperson.

  5. Job done

    Leave a rating for your tradesperson based on quality, reliablity and value.

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