External wall insulation Prices

Compare External wall insulation Quotes

Home > Insulation Projects > External wall insulation

External wall insulation

External wall insulation comprise of an insulation layer fixed to the existing wall, typically with a protective render finish. Alternatively dry cladding offers a wide range of finishes such as – timber panels, stone or clay tiles, brick slips or aluminum panels.

 

External wall insulation is a method of upgrading the thermal performance and external appearance of existing properties. Insulated and rendered properties are transformed into warm, energy efficient and attractive homes.

 

Whenever you fit solid wall insulation to a building you need to take account of water vapour to make sure that you don’t create new damp problems in the future. This may involve using “breathable” insulation materials that will allow the vapour to carry on permeating the walls, or it could involve creating a continuous vapour barrier to make sure no vapour can get into the walls from the inside. You will need an experienced specialist installer to develop a moisture control strategy that is specific to your building.

 

 

Average External wall insulation cost

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 2022

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 your area, as reported by local Quotatis members.

External wall insulation installation cost in your area 2022

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

Advantages for External wall insulation

  • Can be applied without disruption
  • Does not reduce the floor area of your home
  • Will improve weatherproofing and sound resistance
  • Reduces condensation on internal walls and can help prevent damp

Disadvantages for External wall insulation

  • May need planning permission
  • Requires good access to the outer walls
  • Is more costly than internal insulation

External wall insulation FAQs

Is external wall insulation safe?

With the numerous benefits that comes with the installation of an external wall insulation in a building, it’s also important to find out whether it’s also safe before proceeding to fit one in your home. Firstly, to ensure that external wall insulation systems are safe, they must be BBA approved, which means they’ve been subjected to a thorough testing by the British Board of Agrement and therefore, suitable for use in UK homes.

Given the fact that cladding materials have recently generated a lot of debate and negative press about how reliable some particular materials are, questions are being asked of the safety and reliability of external wall insulation. However we must clarify that, although external wall insulation can be classified under cladding, it is very different to rainscreen cladding - which caused the Grenfell fire tragedy.

External wall insulation is completely safe. However, when it comes to fire, the safety of your system depends largely on the insulation type in question. The safest type of insulation you can have installed is the Rockwool insulation boards which are rated as Euroclass A1 non-combustible. The board is specially designed in such a way that it contains fire - preventing it from reaching the other areas of the building. They also do not produce harmful emission or smoke when impacted by fire.

Meanwhile, the Wood Fibre, is also a great insulation which is known to char and not burn. Contrary to many beliefs, it actually burns slowly creating this charring effect which produces an oxygen barrier that helps reduce the spread of fire.

To make your system safer, you can also make use of Fibreglass Mesh for reinforcement. It helps to improve the strength of the tensile which promotes the security of the boards attached to the wall.

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.

Will external wall insulation stop condensation?

Damp issues on a property are usually generated by a lot of factors such as a poor or broken guttering, condensation and lots more. The question arising here is what is the possibility of External Wall Insulation (EWI) preventing condensation? Not only is EWI a reliable way to reduce condensation-caused damp, but it’s also one of the major reasons property owners in solid wall homes consider thermally rendering or cladding their external walls.

Condensation arises as a result of warm moist internal air hitting a cold surface such as the steaming up of both windows and mirror when having a shower. What happens here is the condensation of the water vapour in the air from a gas to liquid in the process of touching the cold surface - one whose temperature is significantly reduced to reach the dew point. At the dew point, condensation is very rampant, and to tackle this issue you’ll have to heighten the wall temperature in order to convert the moisture to vapour and permit it to pass through the wall. And that’s exactly the job of an external wall insulation!

To get started you must ensure that the walls are clean and dry prior to fitting the external wall insulation. The month of May through to September when the weather tends to be dry and more stable are usually the best period to carry out the project. The external wall insulation will function just like a cosy blanket around the building. Ultimately, changing the feel and temperature of the inside of your home. As a result, the previously cold walls will no longer be cold which goes a long way to mitigate the effects of condensation. Furthermore, when an EWI is installed, the rooms of your home will automatically trap more thermal mass as the heat is saved in the walls’ fabric and released back when the temperature drops.

Are there grants available for external wall insulation?

External wall insulation works to keep your home cosy and comfy while also helping to cut the energy bills. However with the great benefits also comes great costs, so it’s actually a logical decision to know whether there are grants out there which you’re eligible for to help you handle the cost of the external wall insulation.

There are grants available for external wall insulation, but rarely will you find one that covers the full installation cost. With the help of the government’s Energy Company Obligation (ECO) scheme, a couple of energy companies assist in making your home more energy efficient by offering grants or free insulation. In certain cases whereby you receive particular state benefits, you may as well qualify for a higher grant that’ll cover more of the insulation cost.

However, if your energy supplier doesn’t offer any grant, you need not worry as you can save as much on energy bill after installation. Here’s what insulation can help you save per year on energy bills:

• Floor insulation can help you save within a range of £30 to £75 each year.

• Cavity wall insulation can help you save about £85 to £280 a year.

• Loft Insulation (270mm) can help you save about £135 to £250 a year.

Generally, the amount you’ll be able to save on your energy bills depends mainly on the type and size of your property, as well as how energy efficient it already is without the insulation. In the long run, your external wall insulation will more than give you back your investment on the valuable project through your savings on energy bills. In other words, whether or not you’re eligible for a grant should never stop you from installing an external wall insulation.

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!

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.

Do I need planning permission for external wall insulation?

If you want to install an external wall, it is only wise to consider whether or not a planning permission is required in order to avoid a hefty fine. In a great kudos to the government and a welcome relief to home and property owners, the installation of external wall insulation is seen as an “improvement to the house and not an “extension or an “enlargement. Ultimately, this implies that external wall insulation fitting is to be done under permitted development and a planning application may not be required. However, like many other regulations, there are also exceptions to this rule and the main one is if the activity changes the appearance of your property. Properties such as a listed building having tighter regulations may pose some issues. As a result, we’d advise you to consult your local authority to ensure that there’s no fast rule to this topic before commencement of the external wall insulation project.

At the moment, according to the Government Building Regulations, the surface of the entire wall is to be improved to existing standards if the area to be insulated exceeds 25 percent of the wall. In normal situations this is usually the typical case, however to prevent avoidable fines and other possible punishments, it is always best to reach to your local authority and check out the rules guiding external wall insulation in your constituency. Furthermore, since external wall insulation is not a task that’s recommended to be done by yourself, you can also ask the professional external wall insulation fitting company for the applying rules before proceeding. As a good professional, the company should have a better knowledge of the rules and regulation guiding its activities.

How to get free external wall insulation?

This is a very great opportunity to not only get free external wall insulation, but also cut down your energy bills depending on the type of property you live in. Generally, to enjoy free external wall insulation you must at least be part of the group receiving one of the benefits listed below and also depends on the amount of money you earn. The benefits include:

• Income based jobseeker’s allowance (JSA)

• Income support

• Income-related employment and support allowance (ESA)

• Tax credits

• Pension credit guarantee credit.

• Universal credit.

There are also other important factors that determines if you can have a free insulation fitted on your property. These includes the place you reside, the carbon level of your home and according to some suppliers, the level of beneficial impact the insulation will have on your home. In order to have a free external wall insulation installed, you must either be the owner of your home or at least obtain the go ahead from your landlord before any external wall insulation activity can be made.

Good news is, if you fit the aforementioned criteria and you’ve already installed an external wall insulation, you just may be entitled to receive a refund for the good job done. However, to really find out if you’re eligible, we’d recommend you get in touch with your supplier directly. Also, the Energy Saving Trust (EST) can direct you to some organizations who can assist you in the determination of your eligibility.

As a home and property owner living in England, you can also check out the Each Home Counts Advice Website which is committed to giving impartial energy efficiency advice.

At the end of the day, if it turns out you happen to be ineligible for a free external wall insulation, you can still go ahead to contact a professional installer for a help at a competitive price to enjoy the several benefits that comes with home insulation.

External wall insulation explained

Weatherdry Insulation

Based: in Tamworth, B79

We are a company that specialises in Damp Proofing & Insulation. We have a 100% success rate in res...

Latest review

Patrick B., B37
7th December 2021

Insulation | External Wall in Solihull

Weatherby where the only ones to pay a visit, others only gave estimated quotes.

BAMM HUB

Based: in Ramsbottom, BL0

BAMM HUB is based in Ramsbottom and have 7 positive reviews

Latest review

Paul W., DE4
8th July 2017

Insulation | External Wall in Matlock

Only one quoted. Excellent discussion and survey and a very competitive price

WEATHERSEAL FACADES

Based: in Rugby, CV22

We are a professional and customer focused business that specialise in External Wall Insulation. We ...

Latest review

Michael S., WR11
24th August 2015

Insulation | External Wall in Aldington

Weatherseal were excellent. Very helpful throughout the process

Rated Local builders

Weatherdry Insulation Ltd

3 review(s)
Based: in Tamworth, B79 7XH

We are a company that specialises in Damp Proofing & Insulation. We have a 100% success rate in resolving damp issues connected to RISING or PENETRATING damp. We offer a FREE, NO OBLIGATION damp survey and quotation .

WEATHERSEAL FACADES

2 review(s)
Based: in Rugby, CV22 5BD

We are a professional and customer focused business that specialise in External Wall Insulation. We have over 25 years experience in construction and are Green Deal approved, with all insurances and CHAS and Constructionline Accreditations held.

BAMM HUB LTD

7 review(s)
Based: in Ramsbottom, BL0 9BJ

BAMM HUB LTD based in Ramsbottom, offer services in Insulation. They have an average rating of 4.4457142857143 from 7 review(s). See their latest 5 star review below

Similar Customer Enquiries for External wall insulation

13 Jan

Insulation | External Wall

Cheltenham - GL50

Enquiry from: Will M

Start Date: Immediate

External wall insulation Lead External wall insulation Lead

hello, we've just moved into a flat with patchy ceiling insulation, what looks like no roofing insulation, and maybe some uninsulated hot water pipes. could you please provide a rough quote to be pass...

Post a similar request >

12 Jan

Insulation | External Wall

Bournemouth - BH9

Enquiry from: Rosalind M

Start Date: Immediate

we have a flat roofed extension comprising a lounge and office. it is very cold in winter and hot in summer and we would love to improve that. timescale for the work is in 2022. are you the property ...

Post a similar request >

12 Jan

Insulation | External Wall

Sittingbourne - ME10

Enquiry from: Kirsty B

Start Date: Immediate

Conservatory roof insulation. Edwardian style, 4m x 6m, polycarbonate roof.

Post a similar request >

12 Jan

Insulation | External Wall

Harlow - CM19

Enquiry from: Matthias M

Start Date: Immediate

External wall insulation Lead External wall insulation Lead External wall insulation Lead External wall insulation Lead External wall insulation Lead External wall insulation Lead

Hello I have a flat concrete slap roof which is leaking. Would like to explore options without having to take the entire roof off.

Post a similar request >

11 Jan

Insulation | External Wall

Malvern - WR14

Enquiry from: Robert L

Start Date: Immediate

re-roof a part of my roof which is flat and 2m by 4m with a new insulated roof are you the property owner: owner of the property property type: detached how many bedrooms do you have: 3-4 bedrooms pro...

Post a similar request >

11 Jan

Insulation | External Wall

Romford - RM7

Enquiry from: Nazma B

Start Date: Immediate

external solid wall installation are you the property owner: owner of the property property type: semi detached property age: 1930-70 how many bedrooms do you have: 5+ bedrooms please call to appoint

Post a similar request >

10 Jan

Insulation | External Wall

Edinburgh - EH16

Enquiry from: Larissa P

Start Date: Immediate

External wall insulation Lead

We are looking to insulate a flat roof that has an area of about 10m2 (see image attached). We are in the south of Edinburgh EH16. Would you be able to send me a quote?

Post a similar request >

09 Jan

Insulation | External Wall

Luton - LU3

Enquiry from: Sajjad R

Start Date: Immediate

external wall insulation to cover all of the house are you the property owner: owner of the property property age: 1930-70 property type: semi detached how many bedrooms do you have: 3-4 bedrooms ple...

Post a similar request >

05 Jan

Insulation | External Wall

Maidstone - ME14

Enquiry from: David K

Start Date: Immediate

insulated panel (edwardian style) conservatory roof are you the property owner: owner of the property property type: detached how many bedrooms do you have: 3-4 bedrooms property age: 1970-2000 pleas...

Post a similar request >

05 Jan

Insulation | External Wall

Port Glasgow - PA14

Enquiry from: Scott F

Start Date: Immediate

external wall insulation to end terrace house are you the property owner: owner of the property property type: terrace how many bedrooms do you have: 1-2 bedrooms property age: 1970-2000 please call ...

Post a similar request >

05 Jan

Insulation | External Wall

Witham - CM8

Enquiry from: Zodie T

Start Date: Immediate

External wall insulation Lead External wall insulation Lead

supply and install of insulation on existing gable conservatory roof. 8 polycarbonate panels with 2 window openings. room 3000 x 4550 are you the property owner: owner of the property property type: t...

Post a similar request >

04 Jan

Insulation | External Wall

Ruislip - HA4

Enquiry from: Roy B

Start Date: Immediate

Roof insulation for a 14 sqr m Victorian Style with Polycarbonate roof. Prefer plaster finish or plain UPVC sheeting.

Post a similar request >

04 Jan

Insulation | External Wall

Falmouth - TR11

Enquiry from: David F

Start Date: Immediate

External wall insulation Lead

we are upgrading our garage to make it a bit more comfortable and useful. i have a pitched roof garage that is about 3 metres by 5 metres attached to the side of the house. i’d like to insulate th...

Post a similar request >

04 Jan

Insulation | External Wall

Rhyl - LL18

Enquiry from: Joyce J

Start Date: Immediate

conservatory roof insulation

Post a similar request >

04 Jan

Insulation | External Wall

Bridgnorth - WV15

Enquiry from: Stuart H

Start Date: Immediate

conservatory roof insulation - 14 panels - victorian style - 3.5m x 2.7m are you the property owner: owner of the property property type: detached how many bedrooms do you have: 3-4 bedrooms property ...

Post a similar request >

04 Jan

Insulation | External Wall

Isle of Man - IM3

Enquiry from: Peter G

Start Date: Immediate

we have a 17 sq m conservatory. would like quotes for a standard roof and an additional option of including a pyramid skylight. are you the property owner: owner of the property property type: detach...

Post a similar request >

01 Jan

Insulation | External Wall

London - W13

Enquiry from: Anthony P

Start Date: Immediate

Exterior wall insulation pre 1920.

Post a similar request >

01 Jan

Insulation | External Wall

Exeter - EX4

Enquiry from: Francesca C

Start Date: Immediate

hi there, i'm looking to have some improvements made to the loft space in my mid-terrace, 2-bedroom home. at the moment it only has a single, older layer of roof insulation. i'd like to have the insu...

Post a similar request >

31 Dec

Insulation | External Wall

Ballynadolly - BT28

Enquiry from: John M

Start Date: Immediate

flat roof insulation 18 feet by 11 feet

Post a similar request >

16 Dec

Insulation | External Wall

Harrogate - HG2

Enquiry from: Sharon R

Start Date: Immediate

pitch roof insulation . best option and idea of costs are you the property owner: owner of the property property type: semi detached how many bedrooms do you have: 3-4 bedrooms property age: 1930-70 ...

Post a similar request >

How it works

Tell us about your External wall insulation project

Answer a few quick questions so we can match you with professionals who can help.

Find up to 4 Builders in your area

Get free, no-obligation quotes from 4 verified Builders working in your area.

Hire with confidence

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

Need more help?

6 Essential Tips for Installing Insulation Published: 16/02/2017 If you think your home needs new insulation, you have two choices. You can either hire a contractor to install it or have a go at doing it yourself. Insulation needs installing properly to ensure that it’s safe and effective. Hiring a professional to fit it is a reliable way to make sure this happens. […] Read this article
Your Loft Insulation Questions Answered Published: 06/09/2016 You might have a few loft insulation questions if you’ve never had insulation before. And even if your loft is already insulated, you might not know all the ins and outs of the process. So here we are – we’ve answered some of the most popular questions about loft insulation so you can make sense […] Read this article
How to Draught Proof your Home and Save Money Published: 07/07/2016 If you want to save money on your energy bills but don’t want to spend too much money, you could draught proof your home. Draught proofing is very efficient and will reduce your energy bills without you having to spend much money on materials. You’ll need to find all the unwanted gaps in your home […] Read this article