Home Insulation Guide

Ensuring that your home is properly insulated helps you maintain your desired room temperatures. In this guide, we’ll provide you with everything you need to know about home insulation. This will provide you with an idea on potential savings!

What is home insulation?

 Home insulation prevents outside temperatures from affecting the temperature in your home. Common insulators include fiberglass, mineral wool and cellulose.

Insulation is often deemed as one of the most effective and efficient ways of saving energy. It places less pressure on your home heating (and your finances) by reducing heat loss. It also helps to keep your home cool in the summer by blocking the warmer air from entering.

If you live in an older home, your property may not be well insulated. It’s a good idea to get this reviewed. Proper insulation will help you reduce your energy usage.

What are the different types of home insulation?

There are several different areas in which insulation can be installed within your home.

The most popular areas include:


It is estimated that around a third of the heat loss is because of uninsulated properties [1]. Depending on the age and build of your home, this can be prevented by either cavity wall or solid wall insulation. If your property has solid walls, you can choose between internal wall insulation and external wall insulation.

Insulated walls could save you up to £375 (solid wall insulation) or £280 (cavity wall insulation) per year. It could also significantly lower your CO2 emissions [2].

Roof and Loft  

If you live in an uninsulated home, approximately 25% off your heat can be lost through your roof [3]. Flat roof or loft insulation could reduce this heat loss and save up to £395 each year [4]. You could also lower your household carbon dioxide emissions by around 1030kg [4].


Flooring accounts for around 10% of heat loss in an uninsulated home [3]. The scale of the insulation required for your home will depend on the type of floors you have. Insulating underneath your ground-floor floorboards could save you £40 on your annual energy bill [5].

What other forms of insulation are available?


Often regarded as one of the most inexpensive and efficient ways of saving energy. Draught-proofing your home could help you make great savings on your energy bill. The best thing about this measure is that it can be completed yourself. You don’t have to worry about forking out for a professional.

Draught-proofing tends to target areas such as windows, doors and chimneys. It helps to seal any gaps that could allow warm air to escape and cold air to enter. This means that your home heating may not have to work as hard.

Pipe and Tank Insulation 

According to the Energy Savings Trust, approximately 28% of your heating bill goes towards heating water [6]. By insulating your pipes and tanks you could help to reduce the amount of energy needed to do this.  This can also be completed yourself. Utilise tools such as foam tubes and hot-water cylinder jackets.

What are the benefits of home insulation?

There are many benefits of insulating your home. Such as:


By blocking outside temperatures and reducing heat loss, home insulation help achieve comfort levels. With effective insulation, you won’t have to worry about your rooms getting excessively hot in summer. You also won't have a chilly home in winter.

Lower energy bills 

A properly insulated home tends to rely less upon heating and cooling measures. For example, you may not need to use your home heating as much in wintertime. 

Reduced carbon footprint

By allowing you to use less energy to maintain temperatures in your home, insulation can help you reduce your carbon footprint. You can choose to have your home insulated with eco-friendly material. Cellulose is made of 80%-85% recycled newsprint [7].


Not only can insulation shield your home from outside temperatures. Insulation can absorb sound from outside and from other rooms.  This can be particularly useful if you live in a city centre or high-traffic location.

Property appeal/resale value

Due to the numerous benefits of home insulation, it is a selling point. You will be able to increase the market value of your home. 

How much could home insulation cost?

Home insulation can seem expensive at first. The savings that can be made often exceed the installation costs. For example:

Cavity wall insulation can cost between £345-£610 [1]. Installation costs can be made back in savings within five years or less [1].

Solid wall insulation can cost around £13,000 for external walls and £7,400 for internal walls [9]. It is possible for you to reduce these costs by getting this work done with other home improvements.

Loft insulation prices can average between £230-290[4]. The Energy Saving Trust claims that this can last up to 40 years. Installation costs can be made back multiple times over this period – highlighting its value for money [4].

Floor insulation prices can range between £520-£1300 [5]. It’s typical for floor insulation to only be carried out on the ground floor. The entire household can reap the benefits of this.

Draught-proofing can be a DIY task that shouldn’t set you back too much. You can use simple (and cheap!) materials such as letterbox brushes and self-adhesive seals. If you opt to get your draughts sealed professionally, this could cost around £200 [8].

Pipe and tank insulation can also be inexpensive as you can perform these measures yourself. A hot water cylinder jacket costs around £15. It can allow you to save around £20 annually [10] on your energy bill. This certainly sounds like a deal worth taking!

Switching energy suppliers is also a great way of lowering your energy bills. You can use our free comparison tool today to find out which supplier could offer you the best tariff for your needs. Alternatively, take a look at our energy guides to find out more about energy saving.


[1] https://energysavingtrust.org.uk/home-insulation/cavity-wall

[2] https://energysavingtrust.org.uk/home-insulation

[3] https://www.thegreenage.co.uk/where-am-i-losing-heat-home/ 

[4] https://energysavingtrust.org.uk/home-insulation/roof-and-loft

[5] https://energysavingtrust.org.uk/home-insulation/floor

[6] https://energysavingtrust.org.uk/home-energy-efficiency/saving-water

[7] https://www.hinkleinsulation.com/blog/most-eco-friendly-insulation

[8] https://www.which.co.uk/reviews/insulation/article/draught-proofing

[9] https://energysavingtrust.org.uk/home-insulation/solid-wall

[10] https://energysavingtrust.org.uk/home-insulation/insulating-tanks-pipes-and-radiators


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