How Much Can Insulation Save You on Energy Bills?

Insulation is a great method of improving a property’s energy efficiency. But as important as this is…people still want to know how much they will save by introducing it to their homes…

This article explains how each type of insulation can help you to save money on your energy bill every year. 

What Types of Insulation are Available?…and How Much Money Can They Save You?

Different types of insulation can have varying effects on how much you can save. The less heat that is escaping from your home – the less you will pay overall to generate that heat!

Cavity Wall 

For cavity walls – insulation is injected from the outside wall to fill the gap between the inside and outside of your home. 

The amount of money you can save will vary depending on the type of home you live in. For example, if you own a detached house, it can cost an estimated £4600 to install cavity wall insulation – however, you could eventually see a yearly saving of £455 on your energy bill. A mid-terraced home where installation is estimated to cost £1500 could make £155 of annual savings. Both of these examples show that having cavity wall insulation is a worthwhile investment that can recoup over 10% in savings every year!

The graph below shows the estimated yearly amount in pounds that can be saved on a variety of different housing types: 

Source: Energy Savings Trust

Solid Wall

Most older homes built before 1990 have solid walls. This is usually indicated by the exterior bricks being laid out in an alternating pattern. 

Solid wall insulation a far more expensive than its cheaper cavity counterpart. With this method, installation can be carried out internally for an estimated £8,500 (semi-detached) or externally for £12,000. If you opt for the external insulation, you may have to acquire permission – this is due to the outside appearance of your property being changed. 

Though it costs considerably more to install, it’s estimated that a semi detached house could save £360 on energy bills with solid wall insulation.

Source: Energy Savings Trust

Loft Insulation 

A considerable amount of heat generated in homes escapes through the roof. Insulating a loft can be an easy process but this also depends on the type of roof and the room you are insulating. Whether it be a flat roof, a room inside the roof, or just standard loft insulation – the correct steps should be taken to ensure the process is carried out correctly. 

A detached home with an uninsulated loft will cost just over £1000 to install the correct depth of 270mm of roll insulation. This will save at least £400 annually on energy bills. 

You can install this type of insulation yourself, however variables such as pre-existing dampness and poor ventilation could create further problems. If you’re not sure if any of these conditions could affect your property, it is always a good idea to call on a professional to do the work for you. 

Source: Energy Savings Trust

What Help Is Available?

You can see which energy-saving grants may be available to you through the Energy Advice Helpline website. Here it lists all the recent government grants; what they include and the help that you could receive. You can also quickly check which grant may be available to you by answering a series of questions tailored to your personal situation.

Billy Strickland
Why Insulation Is Important for Houses? - Energy Advice Helpline January 3, 2024

[…] energy costs and energy efficiency. Cheap insulation materials and installing methods can see you saving money on your energy bills which allows the installed method to pay for […]

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