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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.

Browse External wall insulation specialists

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

Latest homeowner review

Reviewed by John on 4/1/2019

Couldn’t meet better mannered and professional tradesman. Job completed as promptly as possible, really clean workers. Full explanations of all coatings. I would highly recommend external insulation and coating by these good guys.

here at Oakham plastering & property care we cover all aspects of the plastering and property care trade from a patch on the ceiling to a complete house covering all private and commercial work including insurance work with over 30 years experience in the trade fully insured work

Latest homeowner review

Reviewed by Craig on 8/7/2019

Really friendly and professional. Pleased with the work.

M2

External wall insulation

you need professional help in refurbishing your home? You’ve come to the right place. At M2 Contractors we have the right qualifications and skills to offer you a robust set of construction services. You can expect the highest standards of workmanship from us, available to you at very competitive rates. As professionals with years of experience, we offer a great selection of general construction work like plumbing and painting & decoration And house extension and services in and around London.

Latest homeowner review

Reviewed by Alex on 18/7/2019

Very responsive and did a good job in good time.

Been self employed over 20 yrs time served.cover all aspects of plastering

Latest homeowner review

Reviewed by Ronnie on 17/7/2019

very quick and helpfull would recomend to anyone

Building Services is a company that specialises in all interior/exterior services & maintenance work. We offer a high standard of work to both domestic and commercial customers. We are a highly skilled and experienced team & we always strive to achieve an exceptional level of customer satisfaction.

Latest homeowner review

Reviewed by Inez on 24/7/2019

Great job and most importantly reliable and trustworthy.

Hi there we are a plastering and building company We are a family run business Our aim is for customer satisfaction on every job Over 30 years exp All trades back up No job to small or big We cover Edinburgh lothians Fife Scottish Borders Kitchen & bathroom specialists the complete home improvement specialist Same day estimates Free estimates and advice

Latest homeowner review

Reviewed by Emma on 19/7/2019

John did a great job replacing a window ledge and fixing a front step. He was quick, neat and easy to communicate with. I would highly recommend him!

We are specialise in modern system of decorative coloured render,mosaic render,brick effect render.Flexible reinforcement render system as an integral part of decorative final coat render.City&Guilds approved renderers and building treatment installers.

Latest homeowner review

Reviewed by David on 5/7/2019

First class job .always on time and cleaned up at the end of every day. Daniel fitted us in at short notice and him and his team were professional and polite at all times

External wall insulation Silicarend specialist Rendering Plastering Brickwork General building work

Latest homeowner review

Reviewed by Alex on 26/7/2019

As this was the final stage in our renovation project, we looked for a company who not only provided a high standard, but also one which would come in on budget. Nu-Look absolutely achieved this. We couldn't be more thrilled with the transformation. The difference with the interior temperature was instant and the finish looks superb. The guys consulted us at every stage and were a pleasure to have on site. We would highly recommend them and are looking forward to our reduced heating bills.

Family Builders in the North West area Looking to relocate back in the North West after having been based in London for the last 3 years. We can offer all services to our clients from small extensions to larger projects. we are reliable and professional and will work with you to achieve the outcomes for your property. FMB membership number 79284. Cure It approved contractor - cert 2518

Latest homeowner review

Reviewed by Diane on 15/11/2018

Excellent job and will be using him again in the future

Latest homeowner review

Reviewed by Nadia on 28/11/2017

Andre and his two man team came and quoted me, they gave me ideas of how to rectify the tiling mess and put on the new taps, turnt up on time the next day, he even went out to buy extra materials, completed job in one day and returned next day to finish off sealent. Really pleased with this team of 3, professional and hard working. Very efficient and clearly knows his trade. Cannot fault them. Great work.

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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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