External wall insulation in Wales

External wall insulation Prices in Wales

Home > Insulation Projects > External wall insulation > Wales

External wall insulation in Wales

Are you trying to find External wall insulation in Wales? Our network of installers can help with your task. Every one of our Builder in Wales are checked so you can see local testimonials, when business was formed, reviews, satisfaction and also price,  permitting you to make the appropriate choice on who to employ. Allow us take the headache out of discovering approximately 4 pros for your External wall insulation project.

A wall surface does numerous points, only one of which is to hold the roof up. Because the 1970s the wall surface's duty in keeping the warm in has actually become increasingly essential.

External wall surface insulation entails fixing a layer of insulation product to the wall surface, then covering it with a unique kind of render (plasterwork) or cladding. The coating can be smooth, distinctive, coloured, tiled, panelled, pebble-dashed, or completed with brick slides.

 

Is External Wall Insulation Worth doing?

There are a variety of problems to be resolved prior to mounting outside wall surface insulation, yet the advantages are numerous, consisting of:

  • Minimizing warmth loss and also energy costs
  • Decreasing draughts and boosting the feeling of convenience
  • It does not interfere with your house while being installed
  • It does not minimize inner floor location
  • It enables walls to contribute to thermal mass (the 'tea cosy' result).
  • It improves weatherproofing as well as sound resistance.
  • It enhances the life of the wall surface.
  • It lowers condensation on inner wall surfaces.

 

Is Preparation Approval Required for External Wall Insulation?

Whatever else external wall insulation does, it will change the external look of your house. Most of the times that will certainly imply gaining planning authorization prior to embarking on the job, so do consult your regional authority from the outset. For homes in Conservation Areas and for provided buildings it is rather feasible that consent will certainly not be forthcoming.

Under Building Regulations, if 25 percent or even more of a wall surface is to be shielded externally, it is commonly required to bring the entire wall up to present requirements-- which makes feeling in that, if you're mosting likely to most likely to the initiatives and expenditure of shielding externally, then you might as well do it well. The thermal efficiency of the insulated wall surface must have a U value of no greater than 0.30.

 

Just how much will it set you back?

External wall surface insulation is expensive yet effective. Adding it as part of a larger task will certainly lower the cost, plus it does not need to be done to the whole home; an attractive front altitude might be preferable to inner insulation, while much less attractive side and also rear elevations can be shielded externally. Yet despite the higher price, the benefits outside insulation supplies over inner mean that it is hard to disregard.

 

Common installment expenses of strong wall surface insulation.

  • External wall surface insulation: around ₤ 10,000.
  • Inner wall surface insulation: around ₤ 8,200.

* Based upon a normal 3-bedroom, semi-detached residence in Great Britain.

 

We will give approximately four External wall insulation pros locally, that will offer quotations for the work you want done. You'll get a home visit from professionals in Wales that'll help you to select the right External wall insulation for your home prior to executing the setup. Enter your postcode to start browsing currently.

Average External wall insulation cost in Wales

External wall insulation is expensive but effective. Adding it as part of a project can reduce costs. You don't need to do the whole house, maybe just the front. Typically costs are around £5000-£9000.

 

Average price per External wall insulation job in 2025

Avg. price low

Avg. price low
£6,000

Avg. price

Avg. price
£9,000

Avg. price high

Avg. price high
£15,000

£15500

£11625

£7750

£3875

£0

Prices based on actual External wall insulation costs for Wales, as reported by local LeadsDoWork members.

External wall insulation installation cost in Wales 2025

Labour cost £3,000
Material cost £5,500
Waste removal £500
Time frame: 2 - 3 Days

External wall insulation searches in May 2025

External wall insulation Projects in Wales in April 2025

70,632

Requests for quotations in Wales in April 2025

0

Requests for External wall insulation quotations in Wales in April 2025. 0% change from March 2025.

0

Requests for External wall insulation quotations in United Kingdom in April 2025. 0% change from March 2025.

Source: Numbers calculated based on the search volumes in major search engines

External wall insulation searches in counties near Wales April 2025

Wales

Wales is among the four countries that merge to create the UK. Having a population in excess of 3 million, it's the third biggest country in the United Kingdom, with the capital city of Cardiff home to 346,000. The population density is only 148 people for every kilometre squared. If you’re looking to have any home improvement work done in Wales, make sure you compare quotes from reputable companies to ensure you get the best price for excellent quality work.

Looking for External wall insulation in Wales?

Get free quotes from local builders

Get free quotes

Similar Customer Enquiries for External wall insulation in Wales

22 Mar

Insulation | External Wall

Llantwit Major - CF61

Enquiry from: Julie L

Start Date: Immediate

i am looking to warm wrap externally and insulate flooring. are you the property owner: owner of the property property type: detached how many bedrooms do you have: 1-2 bedrooms property age: 1930-70 ...

Post a similar request >

11 Mar

Insulation | External Wall

Wrexham - LL12

Enquiry from: Allison H

Start Date: Immediate

I need an insulated ceiling putting in my conservatory, it’s Edwardian style approximately 3.8 m long by 3.24 m wide. I need the work doing asap

Post a similar request >

21 Feb

Insulation | External Wall

Treorchy - CF42

Enquiry from: Hywel L

Start Date: Immediate

Hi, I've got a small lean to conservatory that's only 1.8m x 1.8m. would you be able to insulate this for me to make it warmer and quieter in the rain? I live in Treorchy in *** Could you please...

Post a similar request >

07 Jan

Insulation | External Wall

Bangor - LL57

Enquiry from: Elin T

Start Date: Immediate

External wall insulation of 3 walls around a kitchen extension

Post a similar request >

12 Dec

Insulation | External Wall

Crickhowell - NP8

Enquiry from: Jennifer C

Start Date: Immediate

Sloping ceiling insulation

Post a similar request >

06 Sep

Insulation | External Wall

Barry - CF62

Enquiry from: Gian J

Start Date: Immediate

We have a gable end conservatory with 25mm polycarbonate roof that has yellowed. Roof consists of 8 panels approx. 1850mm x 850mm. We’d like this replaced with Heatguard polycarbonate sheets.

Post a similar request >

20 Jul

Insulation | External Wall

Penarth, Dinas Powys - CF64

Enquiry from: Michael H

Start Date: Immediate

Hello, we're looking for a quote to insulate the roof of our conservatory. Many thanks,

Post a similar request >

11 Jun

Insulation | External Wall

Porthcawl - CF36

Enquiry from: Stephen J

Start Date: Immediate

External wall insulation and floor insulation

Post a similar request >

20 May

Insulation | External Wall

Llanelli - SA14

Enquiry from: Joyce R

Start Date: Immediate

Roof insulation to reduce heat in summer. Even a new roof need advice

Post a similar request >

05 Apr

Insulation | External Wall

Haverfordwest - SA62

Enquiry from: Deepak V

Start Date: Immediate

External wall insulation

Post a similar request >

11 Mar

Insulation | External Wall

Cemaes Bay - LL67

Enquiry from: Brian P

Start Date: Immediate

Exterior wall insulation and rendering

Post a similar request >

04 Mar

Insulation | External Wall

Merthyr Tydfil - CF48

Enquiry from: Clive D

Start Date: Immediate

Quote for external insulation to a Terrace house

Post a similar request >

02 Feb

Insulation | External Wall

Bargoed - CF81

Enquiry from: Peter M

Start Date: Immediate

external wall insulation instillation

Post a similar request >

28 Jan

Insulation | External Wall

Aberystwyth, Llanon, Llanrhystud - SY23

Enquiry from: Sulien G

Start Date: Immediate

Would like to know how much for external wall insulation 2 bed cottage single story 70 square m Ball park figure roughly It is a rental EPC F Email best thanks

Post a similar request >

16 Jan

Insulation | External Wall

Merthyr Tydfil - CF47

Enquiry from: Andrew W

Start Date: Immediate

Exterior cladding to one maybe three single extension walls

Post a similar request >

12 Jan

Insulation | External Wall

Conwy - LL31

Enquiry from: Doris P

Start Date: Immediate

Cavity wall insulation. Dormer bungalow semi detached so just downstairs and gable end.

Post a similar request >

01 Dec

Insulation | External Wall

Newcastle Emlyn - SA38

Enquiry from: John T

Start Date: Immediate

our semi detached house had external insulation installed some 6 years ago, it now gone all black. it’s covered by a 25 year warranty,so i’m looking for quotes as the insurance company have asked ...

Post a similar request >

13 Nov

Insulation | External Wall

Llanelli - SA14

Enquiry from: Luke P

Start Date: Immediate

External wall insulation

Post a similar request >

27 Oct

Insulation | External Wall

Cardiff - CF3

Enquiry from: Chris I

Start Date: Immediate

We're looking insulate and improve the look of our conservatory roof, we moved in around a year ago and it was neglected and leaks in one corner. We don't want an entire new roof as we plan to extend ...

Post a similar request >

21 Feb

Insulation | External Wall

Llanelli - SA14

Enquiry from: Clare P

Start Date: Immediate

Conservatory roof insulation

Post a similar request >

Local & reliable builders near me

Tell us about your external wall insulation project

Answer a few quick questions, so we can match you with local builders who can help.

Find up to 4 builders in Wales

Get free, no-obligation local external wall insulation quotes from 4 verified builders working in Wales.

Hire with confidence

Compare customer reviews, services and prices, and choose the right tradesperson for you.

Our reviews

Average

Would highly recommend

Would highly recommend, they found me a firm which I was happy with a quote they give me and went ahead and had my job done within 2 days of enquiring.

Good easy way to find a selection of…

Good easy way to find a selection of trades you need all in one place.

Love LeadsDoWork it's a big part of my …

Love LeadsDoWork it's a big part of my Business I would recommend to anyone

FAQs

Does external wall insulation add value to your home?

The answer is yes! Houses whose external walls have been insulated are more valuable than their uninsulated counterparts. And not only does it add to the value of a home, but also significantly reduces the amount of electricity consumption. This is a major turn on for potential investors which implies a greater demand and ultimately, a higher price. The real estate market is a very dynamic one which can be hard to predict at any particular time. The frequent changes in price are usually down to factors beyond the owners’ control, but if you’re looking to put up your house for sale in the near future, it would be a wise decision to consider ways in which you can increase its value. While renovating each room can be on the expensive side, a great solution would be insulate the external walls.

An insulated house is one that is well secured against the harmful impact of extremely high or low temperature, humidity and other atmospheric factors. Hence, the reason why a house with external wall insulation has a greater value which you would not want to miss out on. What’s more? You’ll get a great thermal insulation with the top notch materials like foamed polystyrene, high quality renders, mineral wool or polyurethane.

With an external wall insulation, you know the transaction will always be favourable on both ends. You get to smile to the bank, while the buyer also gets to enjoy great value for every penny spent. To employ the services of a reliable external wall insulation expert, simply conduct an in depth research from family and friends, online and other sources. Go through their online reviews and ask questions to become more familiar with the process and its value-adding potentials.

How good is external wall insulation?

External Wall Insulation (EWI) is the act of insulating a home by fitting insulation to the exterior parts of the building which in turn improves thermal performance, cuts energy consumption ( savings on energy bill) and also adds to the home’s visual appeal. The systems are built in multiple layers, with the insulation board offering a plethora of options with each being suitable to varying projects and their needs. Installing an external wall insulation comes with a variety of benefits, let’s have a look!

• Thermal Performance Improvement

With EWI, the thermal inertia of the walls are greatly enhanced while also restricting the loss of heat. Ultimately, this lowers heating costs, enhances the comfort of indoor thermal and also reduces CO2 pollution.

• Eliminates Noise Pollution

When the noise levels are high, it can have a bad impact on our overall well being. A great way to reduce the disturbances from the outside like traffic noise is by fitting an External Wall Installation system.

• More Comfortable Living Space

Do you know the damp in homes can contribute to respiratory problems? A properly insulated home will greatly limit the impact of condensation by combating the damp issues. As a result, you can always expect your house to be cosy and comfy irrespective of the season. A cooler summer and warmer spring is guaranteed with EWI.

• Enhances The Property’s Visual Appeal

Looking for an excuse to rejuvenate your home’s aesthetic appeal? Well, you can as well try out adding an EWI system. There are a plethora of unique colours and styles you can pick from to beautify your home effortlessly.

• Adds Value To Property

An insulated home will generally cost more than an uninsulated one at the time of resale. Potential home buyers are more interested in the acquisition of a home with an EWI system due to its various benefits - and a higher demand can only imply a higher price!

How to fit external insulation?

With the title of this blog, do not be deceived into thinking the purpose is to encourage you to install an external insulation by yourself. Even as a competent DIYer, it’s not advisable to buy a couple of materials and start slapping it into the wall hoping for the best outcome. External insulation is by no means a DIY job and without the proper training and experience, it can easily turn out disastrous resulting in loss of time, effort and money in such a valuable project. This blog, however, will give you a great insight on how the installation process works and help maximize knowledge ensuring you do not spend more than necessary.

External Insulation Installation

lRender Test

• This is done to ensure the existing render is good enough for insulation support.

• If positive, the insulation can be applied directly onto it.

• If negative, ensure removal of the old render before fitting the insulation.

lPipework Adjustment & Removal

• Remove all pipework prior to insulation fitting

• Install temporary downpipes to ensure water is not wasted and everything continue to function normally during the insulation fitting process.

lWindow Protection

• Protect the window with a protective layer or film.

lStarter Track Fitting

• Determine level you want the insulation to start (height).

• Fit the aluminium start track or carrier tray at the identified level.

lInsulation Boards Fitting

• Apply a layer of adhesive to the board and glue them to the wall in a staggered pattern.

• Cut to fit round all obstructions and windows.

• File off the edge of the board where necessary using a rasp upon successful fitting of the boards

lMechanical Fixing Inclusion

• Hammer around 10 fixings per square metre into the board.

• This is to secure the insulation boards.

lBeading Fitting

• Add corner beads and stop beads to ensure the insulation is secure and to prevent it from making contact with other materials.

lReinforcing Mesh & Render Addition

• Apply two layers of strengthening properties and between the two layers of render, include a fibre glass mesh.

lPrimer Application

• Paint on the primer

lFinal Render Application

• Choose your most preferred texture and colour as this will be the last coating of the installation process.

lPipework Re-installation

• Re-install all detached pipework at the start of the installation process.

How much does external solid wall insulation cost?

Before the commencement of any project, it’s always best to get an estimation of the cost. However, determining the cost of an external solid wall insulation is not the easiest of tasks as it relies on varying components such as the insulation materials to be used, labour cost and installation as well as the type of decorative finish to be incorporated. And depending on your choice of insulation material, some may need some adhesives while others may require some fixings which also contributes to the differences in price. As a result, the determination of the material cost alone can be tricky and even more so when various materials cover varying areas.

With that in mind, the cost of external solid wall insulation generally ranges between £80 to £100 per square metre2. As a result, a small flat can cost from £6000 to £9000 whereas a large detached house can have a price ranging between £21000 to £23000. To earn back your investment in terms of energy bill savings can take a couple of years, but it’s surely worth the try as there are several other benefits associated with installing an external solid wall insulation system. What’s more? Another huge factor that can influence the cost of your system is also the amount of work that’s required, how easy it is to be accessed by the installers and lots more

If you’re looking to cut down on the cost of your external solid wall insulation, then the best time for an installation might just be when you’re having another decorating or building project done such as fitting a new roof, window painting, installation of solar PV panels and more. This way, you’ll be able to spread the cost and have a greater value for each penny expended.

Placholder Image

Other Top Projects in Wales

Customer Reviews

Overall rating:


Wales External wall insulation installers are rated 4.6 out of 5 based on 3 reviews of 15 pros.
The LeadsDoWork rating and review is an overall rating based on verified reviews and feedback from the customers with External wall insulation projects that have been connected with External wall insulation pros to help them. All External wall insulation contractors All Wales External wall insulation contractors

Are you a builder in Wales?

We can help you get more external wall insulation work with our qualified job leads and boost your business.

Join today