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Cost of Loft Insulation? Your Home Insulation Questions Answered

12 January 2024 | Insulation Guides

Have you looked into insulating your home yet? Does your home already have cavity wall insulation, external wall insulation or loft insulation and if so, are you aware of its effects on your energy bills?

The UK government has set ambitious targets for all homes to have an EPC (Energy Performance Certificate) rating of C by 2035. For this to happen, homeowners across the UK need to be well informed of the different types of insulation available, their effects on energy efficiency and energy bills and, of course, how much an investment in such a home improvement is required.


According to Which? research, in the last five years only 37% of homeowners in the UK have taken that first step in researching insulation for their home. Of those that have, only one in five have used the government’s home energy assessment tools to take that all-important next step.

Residential Energy Services specialises in making that next step as stress-free as possible. Our free eligibility checker can help you determine what funding support is available for free or reduced-cost insulation measures for your home, such as loft insulation, cavity wall insulation and more.

Suppose you’re curious about how home installation works and want to understand what the next step looks like. In that case, we’ve answered some of UK homeowners’ most popular questions about the cost of loft insulation, what to expect for your investment and how to get free loft insulation grant support.

How expensive is loft insulation?

According to Checkatrade, average quilt insulation (270mm) for a detached house costs around £930. Labour costs for the average loft is £250 per day. Any necessary electrical rewiring will cost an additional £250 per day on average. These figures will of course vary depending on the type of insulation you use, for example blanket and fibre based insulation will will differ greatly to mineral wool.

Additionally, labour costs can vary depending on the professionals you use or if you decide to install the installation yourself. For loft insulation to have a lasting effect on your home, it is essential that it is installed to the highest standard.

Do I really need loft insulation?

Which? research shows that many UK homes are very much in need of improved insulation measures. the U.K.’s housing stock is among the coldest in Europe. 57% of homes in England are currently below the government’s target for energy efficiency. 

The fuel poverty crisis is affecting homes across all regions of the UK, so it is worthwhile looking into the benefits of loft insulation for your home, irrespective of the area you live in or how much you are currently paying for energy.

How do I know if I need insulation?

Residential Energy Services specialises in making that next step as stress-free as possible. Our free eligibility checker can help you determine what funding support is available for free or reduced-cost insulation measures for your home, such as loft insulation, cavity wall insulation and more.

Suppose you’re curious about how home installation works and want to understand what the next step looks like. In that case, we’ve answered some of UK homeowners’ most popular questions about the cost of loft insulation, what to expect for your investment and how to get free home insulation grant support.

How much can I expect to save with loft insulation?

According to the Energy Saving Trust, you can expect to save up to £475 a year on your energy bills through loft insulation alone. This is based on a gas-heated home with 270 mm of mineral wool loft insulation; the size of your home and the type of insulation installed will vary.

Should I hire loft insulation installers to do the job?

It is always recommended to carry out installation work with professionals you can trust. Given the nature of the typical loft space, it can be more difficult to navigate tricky areas and work around plumbing and electrical materials safely. 

Additional benefits include being able to dispose of residual materials, examining the area to ensure all roof spaces are suitable, and knowing which equipment and tools are required to complete the job as quickly and effectively as possible.

Am I eligible for free loft insulation?

The Great British Insulation Scheme (GBIS) is the latest government initiative to help improve the thermal efficiency of buildings by providing installation measures such as loft insulation, funded by homeowners’ energy suppliers.
If your home falls in the council tax bands A-D in England or A-E in Scotland and Wales and your home Energy Performance Certificate (EPC) is D-G, you are likely to be eligible for free loft insulation under the Great British Insulation Scheme.
Head over to our eligibility page to check if your home is suitable for free or reduced cost insulation measures, including loft insulation, through means such as ECO4 grants or GBIS.


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