– WALL INSULATION DEFINITIVE GUIDE – 

EVERYTHING YOU NEED TO KNOW ABOUT WALL INSULATION –

WALL INSULATION DEFINITIVE GUIDE

In this article, Buildings and Trust will explain in detail what you need to know about the different types of wall insulation in the UK.

Cavity Wall Insulation (CWI)

What is a cavity wall?

Most importantly, a cavity wall is a wall with an outside ‘skin’ of bricks, an inside skin of blocks, and a cavity in between the two. Wall ties hold together with wall ties.

What is cavity wall insulation or (CWI)?

In contrast to today, most houses built after the 1920s will probably not have insulation in their cavity. Consequently, it was only towards the end of the 1900s that bricklayers placed insulation inside the cavity. This provided the house with greater heat efficiency. Moreover, this would make the home more energy-efficient. Finally, this would lead to a reduction in fuel bills.

WALL INSULATION DEFINITIVE GUIDE

How much heat am I losing from my home?

On the other hand, if your home does not have insulation in the cavity, you could be losing up to a third of the heating from your home. When the cavity wall insulation is installed, you could literally save hundreds of pounds a year.

In addition, the extra heat trapped inside the home will lead to greater thermal comfort for the occupants. This will definitely keep your home toasty warm!

Will cavity wall insulation (CWI) help to benefit the environment?

For this reason, by reducing the need for standard methods of heating up the home, you will be helping to benefit the environment. There will be a reduction in fossil fuels. In conclusion, this will lower your carbon footprint.

How can I tell if my wall has a cavity?

Notably, a cavity wall will have all the bricks following the same pattern. Furthermore, they will be all overlapping the bricks below. This is why the cavity wall is sometimes known as a ‘half- bond’ wall. See image.

WALL INSULATION DEFINITIVE GUIDE

WHAT CAVITY WALL INSULATION WILL DO FOR YOU

Please take some time to read what benefits cavity wall insulation will do for you.

Wall Insulation Definitive GuideFirstly, cavity wall insulation (CWI) will keep your home toasty warm!

Thirdly, cavity wall insulation (CWI) will add value to your home. Your home will be more energy-efficient!

Secondly, (CWI) will save on energy costs and keep the cat warm!

Wall Insulation Definitive Guide
WALL INSULATION

Finally, the walls won’t feel the cold anymore!

FIRSTLY, BUILDINGS AND TRUST WILL CONNECT YOU WITH DEPENDABLE, ACCREDITED AND REGISTERED INSTALLERS

Therefore, you can rest assured, Buildings and Trust will be connecting you with the best energy-efficient installation. Furthermore, you will be contributing to a cleaner environment!

SECONDLY, BUILDINGS AND TRUST WILL CONNECT YOU WITH COST-EFFECTIVE REGISTERED INSTALLERS

With the result, Buildings and Trust will advise you how to get your property energy efficient. Most importantly, you will save on those energy bills!

FINALLY, YOU DECIDE

In conclusion, you decide when you require the cavity wall installation to be installed. In addition, you will be keeping your home toasty warm! To sum up, it's a 'win, win' event!

DO I HAVE CAVITY WALL INSULATION?

WALL INSULATION DEFINITIVE GUIDE

What can I do to find out if there is any insulation in the cavity?

Firstly, you could find out the age of your home. As previously stated, if bricklayers built after the 1920s and before 2000, the chances are it won’t have insulation in the cavity.

How will I know whether my wall insulation in it?

Also, you could look very carefully around the external part of the wall. If the insulation has been pumped into the wall, there will be some evidence of small holes in the wall placed at regular intervals.

Furthermore, if you have safe access to the attic, you could investigate whether any exposure of the wall at the top. If there wall exposure, try to see if there is any insulation coming out of it.

Who can I ask about insulation in my wall?

In the first place, you could contact the local council. For one thing, their building control department may have records of any insulation placed into the cavity of the wall.

Will a ‘borescope inspection’ tell me if I have insulation in the cavity?

Yes. To put it another way, you could contact a specialist to drill a small test hole in the wall. In particular, this will help to determine whether there is insulation in the cavity.

WALL INSULATION DEFINITIVE GUIDE

Wall Insulation Definitive Guide
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Is my cavity wall suitable for cavity wall insulation (CWI)?

To begin with, not all cavity walls suit CWI. To be on the safe side, read through these initial checks. Indeed, if they apply to your cavity wall, then your wall will probably benefit from CWI.

  • The wall and brickwork is good condition. There are no cracks, holes, or crumbling of the wall.
  • To begin with, make sure there is no condensation or damp patches on your internal walls. Secondly, if there is, you should not have CWI yet. You must get the condensation problem sorted out first. Driving rain from the outside has bridged the cavity and is now soaking into the internal skin of blocks. In conclusion, adding CWI will only exacerbate the problem.
  • In the first place, installers should be able to have access to the wall(s). Moreover, if there are obstacles or part of the wall is in a neighbour’s property, and the neighbour doesn’t give consent for installers to be on their land, this could be a problem.
  • In general, the cavity should be at least 50mm or 2 inches wide. Consequently, if it is less than this, the wall would not be suitable for CWI.

WALL INSULATION DEFINITIVE GUIDE

Wall Insulation Definitive Guide 5

Firstly, (CWI) will bring a welcome warmth to your home!

Most importantly, cavity wall insulation (CWI) will bring a welcome warmth to your home!

Wall Insulation Definitive Guide 3

Secondly, (CWI) will make a warmer home

In addition, cavity wall insulation (CWI) will keep you toasty warm!

Wall Insulation Definitive Guide 4

Thirdly, (CWI) will give toasty warm satisfaction

Furthermore, those cold winters will be a thing of the past!

External Wall Insulation (EWI)

What is External Wall Insulation (EWI)?

(EWI) is mostly used on solid brick, block, or stone walls. Installers employ it to improve both the energy performance of a home and to improve the aesthetic quality of the exterior.

In contrast to today, homes built before the 1920’s were generally built with solid brick. The building industry now make homes with more energy-efficient cavity walls. These are Cavity Wall Insulations (CWI) because they have insulation placed in the cavity. This insulation greatly reduces the heat lost from modern homes. Not only that, it lowers those all-important energy bills.

Am I losing a lot of heat without insulation on my walls?

Yes is the short answer to that. A home without external wall insulation can be losing upwards of 25%! In other words, without insulation, you could literally be paying hundreds a pounds a year in extra heating!

WALL INSULATION DEFINITIVE GUIDE

Wall Insulation Definitive Guide
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Will (EWI) help to tackle moisture and condensation?

There are many factors that can cause condensation and moisture in a building. Moisture can come from cooking, heating, washing, bathing, showering and many other consequences of human activity. These are all internally produced. In other words, the moisture is coming from inside the home.

Also, you can have moisture coming from below the home. You would commonly call this ‘rising damp’.

External walls can also have rain and moisture soaking through them. This will also cause condensation and mould inside the home.

External Wall Insulation (EWI) will not help with internal condensation or ‘rising damp, but it can help enormously with externally caused dampness. It will provide a much needed seal to the external walls. This will make them weather resistant!

WALL INSULATION DEFINITIVE GUIDE

How will External Wall Insulation (EWI) help me to benefit the environment?

For this reason, reducing the need for standard methods of heating up the home, you will be helping to benefit the environment. There will be a reduction in fossil fuels. In conclusion, this will lower your carbon footprint.

How is External Wall Insulation installed?

External Wall Insulation (EWI) is series of insulated boards fixed to the outside wall of your home. The insulation boards help to stop the heat from your home escaping to the outside.

Once the thermally insulated boards are fixed in place, a render coat is applied. This render coat helps to the weather getting to the boards. The wall is now weather resistant!

There are three stages to the application of External Wall Insulation (EWI):

  1. Preparation and board fixing
  2. A fixing mesh and weather-proof base coat
  3. A final decorative and weather-proof finish

Will External Wall Insulation (EWI) improve the look of my home?

Certainly, it will improve the exterior look of your home! Your house will be the envy of all the town when it is finished!

You can have a variety of finishes to choose from. These finishes can blend beautifully in with the surrounding features of your home.

Will External Wall Insulation (EWI) add value to my home?

Indeed, once the External Wall Insulation (EWI) is completed, your home will have increased in value considerably! What were once shoddy, dirty, and crumbling walls, will be transformed into beautiful exterior walls. Would be buyers would be flocking to buy!

WALL INSULATION DEFINITIVE GUIDE

With the result that within minutes, Buildings and Trust will be connecting you with an accredited and registered local installer.

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Karl Swainston
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