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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.

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Latest homeowner review

Reviewed by Ashley on 13/11/2020

Highly recommended

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 Richard on 24/10/2020

Adrian did a fantastic job rendering our garden wall. Absolutely perfect finish / a real perfectionist. Left the place spotless - even jet washed a wall for us!

We are a company that specializes in external rendering throughout the uk.We cover every external finish from traditional sand and cement render to through coloured polymer renders. We aim to leave all our customers 100% happy.we also cover internal plastering and plasterboarding mainly in the winter months.

Latest homeowner review

Reviewed by Sharon on 27/9/2020

Jonathan is a lovely man turned up on time did the job no hassle looks great very pleased I would definitely recommend him to others

We are a specialist lime restoration company covering lime pointing, brick restoration and lime rendering. We also cover property services with our other main trades including painting and decorating and plastering.

Latest homeowner review

Reviewed by ben on 8/11/2020

Marcus and his team are extremely professional, very capable and totally considerate for the environment they work within. They will give you honest advice and the level of customer service was top quality. As for the work they completed, I was delighted with the outcome. You can trust these guys to do exactly the right thing to provide a quality finish. It’s always a worry hiring people you don’t know, but honestly, there is no need for concern. I will definitely use them again.

Here at SYD property services we take on most of your building needs we have over 12 years in the trades we undertake. we take on any job small or large scale including commercial maintenance. We take on: Roofing Building Truss work Paving slabbing Velux windows installed Plastering rendering Decking installation Fencing Garage conversions These are just a few of the trade we take on all our work in finished to a high standard and we never ask for money upfront. We have reference available to give you a piece of mind but we have a small gallery above to show you some of the great work we do. All our work team are very friendly and will leave the job clean and tidy.

Latest homeowner review

Reviewed by Philip on 23/12/2020

Brendan was quick to get in touch, came and measured up. Rang next day with quote, which we agreed on. Came very soon after to replace garage and porch roof. Job done very well, very happy with it. Highly recommended.

My name is Stuart White I am the proprietor of PREMIER DECORATING SERVICES . I Have been Plastering , Painting and Decorating for 9 yrs now , we only accept 100% customer satisfaction ,I am very clean ,hard working professional , you won't b disappointed

Latest homeowner review

Reviewed by CHERYL on 18/2/2020

Premier Decorators completely replastered my horrible Artex ceilings throughout the house. They did a brilliant job and nothing was too much trouble for them. I will certainly be using them again.

We are a small company based in Sunderland,we cover all building work including extensions,loft conversions,kitchens,bathrooms and full refurbs

Latest homeowner review

Reviewed by David on 16/4/2021

Very Professional and High Quality Service. We able to accomate every requirement and deliver to an increadibly quality at a competitive & fair price. All the workers were timely, respectful and skilled, following the work a review was done to ensure we were completly happy. Looking forward to using them again for our next property work.

ELT plastering and rendering are a team of plastering contractors who offer fully comprehensive plastering services taylores to each of our clients needs. our expertise also extends to full decoration and refurbishment projects making our tailor made packages a hassle free solution to getting your project completed to the highest possible standard and within budget. customer satisfaction is a core aspect of the service we provide and we utilise all of our abilities and expertise to meet your expectations .

Latest homeowner review

Reviewed by ash on 30/12/2020

Elton was so friendly, timely and cost effective. He skimmed our master bedroom for us and it is absolutely gorgeous. He gave us some great advice for some other rooms and we will definitely call him when we need other rooms skimming. We have already recommended him to our friends and next door.

Rely on the professional plastering contractors at Rd and Al Clements plastering. We have over 25 years experience in the plastering and rendering business and cater to provide excellent services to demestic and commercial customers in Wiltshire and the surrounding areas.

Latest homeowner review

Reviewed by Sophie on 12/4/2020

From start to finish Andy was superb! Efficient and tidy, a really professional job. Andy gave us lots of advice about the after care of the plaster and products to use to seal it and paint it- as rookies, this was hugely appreciated! I would recommend Andy to anyone and will definitely use agin in the future! Thank you and sorry for the delay in the review!

As a building company with years of experience and numbers of great feedbacks, we can run any kind of project like full kitchens/bathrooms renovations , lofts/garages conversion, extensions garden rooms/offices etc. As a team, we work very efficient and we running only one project at a time to make sure we focus and keep time frames. With great work ethic we value our customer satisfaction over the profit. We offer free consultation during the project and with great communication skills, we guarantee to manage it on all the way through to the customer satisfaction.

Latest homeowner review

Reviewed by Carl on 26/10/2020

Tom and his team are total stars! Whatever I throwed at him he would sort out and fix for me. A real "can do" mentality that is so refreshing in the building trade. I started with one job and because they did it so well, i asked them to quote on lots of larger jobs in my flat (as i was completely redoing the flat i purchased after the same person had lived there for 40 years). Tom and his team can turn their hands to anything . I TOTALLT trust them and would recommend them to my kids and parents

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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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  • Create a job - it's free

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

  • Get quotes

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

  • Check ratings

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

  • Pick a tradesperson

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

  • Job done

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


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polystyrene insulation on...

we want a small building thermal insulated with polystyrene on the out side then rendered on top

Bedroom Wall Acoustic...

Bedroom wall (possibly two) on second floor flat needs acoustic insulation to reduce airborne noise coming from the ground floor. We are considering...

Pick, render external walls of...

Pick off existing pebble-dash and old render back to the brickwork and insulate, rerender and plaster to finish

just want a quote for the...

just want a quote for the front of my house

repaint/protect the external...

semi detached property, 1930's built, that needs exterior walls repainted/ some cracked areas and need to be waterproofed and made good

Internal Wall Insulation and...

Full bedroom refurbishment - from brick. Two solid walls to be internally insulated , alongside two internal walls to be fully boarded and then...

semi detached house want...

Would like a quote for a semi detached house to have the external cavity walls insulated to the front, side and back of the house.... with furthers...

semi detached house wan cavity...

Would like a quote for a semi detached house to have the external cavity walls insulated to the front, side and back of the house.... with furthers...

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Make good building, re point, re render, water tight or render entire building to make water tight. Replace facias and guttering. Best option required...

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Fire boarding needs to be fitted around an electric cubaord

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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