Insulation and home energy efficiency

How to make your home warmer and cheaper to run — the main insulation measures, grants available, and how to avoid rogue traders.

Reviewed: 3 September 2026
Official sources referenced

A well-insulated home is cheaper to heat, more comfortable and better for the planet. Small changes make a difference, and bigger measures are often part-funded by a grant — but quality matters, so it’s important to use the right people.

The main measures

The biggest wins are usually insulating what you already have: loft insulation, cavity wall insulation where your walls are suitable, and solid wall insulation for older homes without cavities.
Draught-proofing, a hot-water cylinder jacket and floor insulation all help too. Your EPC is a good place to start, as it lists the measures likely to have the most impact on your home.

Grants that can help

Several schemes can cover part or all of the cost for eligible households. The Great British Insulation Scheme offers insulation help but is closing to new installations on 31 March 2026; the Warm Homes: Local Grant supports lower-income owners in England; and ECO4 has now closed to new applications. Our insulation grants page and Grants and funding hub set out what you can still get.

Use a quality installer

Insulation done badly can cause damp, so quality is not optional. Look for a TrustMark-registered installer working to the recognised standards (PAS 2035/2030), get a written quote and guarantee, and be wary of unsolicited doorstep or phone offers that pressure you to sign quickly. If something sounds too good to be true, take your time and check.

What to do next

Check your EPC, see which grants you qualify for, and use a TrustMark-registered installer. If insulation work has gone wrong, see our home-improvement and insulation claims page.

Sources

GOV.UK (Great British Insulation Scheme; Warm Homes: Local Grant); Ofgem;
TrustMark. Reviewed: 3 September 2026.

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How To Reduce Your Energy Expenses
If you are having trouble paying your energy bills, assistance is available. The savings figures and information presented on this page are based on the energy price cap imposed in April 2022. These are currently under review and will be revised shortly following the government’s decision to freeze average energy bills at £2,500 for two years beginning October 2022. The

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Urgent update from the energy saving expert Martin Lewis
Here at Consumer Rights, we actively work toward helping the British public navigate their way through the ECO sector and the seemingly endless red tape. We all see and feel the cost of living continuing to rise, with little or no help for some of our most vulnerable in society. The energy crisis is having

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New Windows
⚠️ ECO4 has closed to new applications — here’s the help you can get nowECO4 grants are no longer available. See the grants and funding you can get now. Some of the information regarding this post may have expired. However, you may still be able to access a different government-funded grant through the ECO4 scheme

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What Does It Mean to Decarbonise?
Decarbonisation typically refers to reducing carbon intensity, or the amount of greenhouse gas emissions produced by burning fossil fuels. This often involves reducing CO2 emissions per unit of electricity generated. Reducing carbon dioxide emissions from transportation and energy generation is crucial for achieving the global temperature the UK government hopes to attain. What is the

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A Guide to British Energy Companies
This page brings together seven of the biggest energy supplier support offers available right now. Whether you’re with British Gas, EDF, E.ON, OVO, Octopus, ScottishPower, or Utilita, there may be a scheme designed to help you. British Gas Energy Support Fund Support for Arrears and Energy Efficiency British Gas offers financial support for customers experiencing

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How would surge pricing on smart meters work?
It is important to change the default setting in order to transmit readings to the supplier automatically at 30-minute periods. This will enable “surge” pricing, a practise in which the unit price is raised during periods of high demand. When suppliers implement “surge pricing” for consumers with smart meters, millions of homes could see their

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20 Surprising Ways You’re Wasting Energy Every Day
Energy conservation is crucial for both the environment and our finances. We can reduce our carbon footprint, save money on utility bills, and contribute to a sustainable future by reducing energy consumption. In this article, we will discuss 20 prevalent energy-wasting actions and offer expert advice on how to save more energy at home. The

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Who Are Ofgem?
Understanding Their Role in the UK Energy Market If you’ve ever looked into your gas or electricity bills, switched energy suppliers, or read about price caps, chances are you’ve seen the name Ofgem. But who exactly are they, and what role do they play in the UK energy sector? What Is Ofgem? Ofgem stands for

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Everything You Need to Know About The Retrofit Academy
The Retrofit Academy is an organisation whose mission is to prepare youth to take the lead in this enormous “retrofitting” effort. By 2050, the UK intends to have achieved net-zero emissions. Millions of older buildings that waste energy will need to be retrofitted, or modernised, to be more energy-efficient and environmentally friendly, in order to

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What is a retrofit assessor?
A retrofit assessor is responsible for evaluating a properties energy efficiency. It should be possible for the retrofit assessor to evaluate the energy efficiency of a property. This will include the properties insulation value, heating and ventilation systems, external and internal appearance, and room count. This post will explain what a retrofit assessor is and

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A Guide To Smart Meters
A Guide to UK Smart MetersFor Tenants, Homeowners, and Landlords in the United Kingdom This page provides official guidance on smart meters, how they work, what they offer, and how to arrange installation. The information is relevant to tenants, homeowners, and landlords across the United Kingdom who wish to better understand the role of smart

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A Guide to External Wall Insulation for Houses
External wall insulation is an effective way to improve energy efficiency and create a more comfortable living environment at home. This guide looks at external wall insulation in detail, including its benefits, the different materials available, the installation process, and the costs involved. It also highlights funding options that could help cover the expense. Why

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Flat Roof Insulation
While the majority of British residences have pitched roofs with lofts, insulation can also benefit flat-roofed properties. Insulating a flat roof can result in substantial energy savings and an improvement in comfort. This article will examine the various varieties of insulation materials, installation techniques, and advantages of insulating a flat roof. The Importance and Advantages

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What is Loft Insulation?
Loft insulation is a material barrier in the loft that retains heat. The joists (the horizontal beams that run along your loft floor) or the rafters (the inclined beams that support the roof) can be used. In either case, it acts like a large, cosy blanket that slows the heat transmission between your living space

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What is Room In Roof Insulation?
Room in roof insulation is an energy-efficient home enhancement technique in which insulation materials are installed between your roof’s rafters. This insulation can prevent heat loss through your roof in the winter and keep your home colder in the summer, resulting in significant energy bill savings. This post will explain all you need to know

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Smart Energy Saving in Your Home!
Here at Consumer Rights we get that saving energy only offers benefits. Whether you want to save money on energy costs, contribute to a better environment or climate, we must be less dependent on foreign fossil fuels, or perhaps all of these reasons at the same time. By saving energy, you can achieve all these

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A Guide to Cavity Wall Insulation Installation Challenges
Cavity wall insulation has grown in popularity as a result of its energy-saving benefits and the government grants that support its installation. However, as the number of installations has increased, so has the number of reported issues, which are frequently the result of improper installation. This article provides a comprehensive guide for identifying and resolving

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Learn More About Cavity Wall Insulation Removal
Cavity wall insulation has been known to divide opinions because of many reactions it has with properties and homeowners. While many believe it is a valuable addition to any home with cavity walls in reducing energy bills and carbon footprints, it has also proven to cause issues in many homes from damp and other water-related problems,

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