Energy Saving Grants | Government Grants for Energy Efficiency


Figure 1: Photograph of Internal wall insulation being installed.

Internal Wall Insulation Grants - All You Need to Know

Feeling the chill and worried about heating costs? Internal wall insulation (IWI) could warm up your home and cut those bills down significantly. Plus, with internal wall insulation grants, you won’t have to pay a penny to have this transformative work carried out if you meet the eligibility criteria. 

Benefits of internal wall insulation at a glance:

  • Lowers energy bills
  • Decreases CO2 emissions
  • Improves comfort indoors
  • Updates room aesthetics
  • Enhances soundproofing
  • Can increase property value
  • Can help reduce condensation and mould problems

At Energy Saving Grants, we assist UK homeowners to obtain the internal insulation government grants available to them. From the ECO funding scheme to the Great British Insulation Scheme, we’re experts at obtaining funding and have helped thousands of people to obtain grants for wall insulation.

Internal wall insulation is one of the most effective ways to keep your home warmer in the winter while reducing your energy costs. We’d be delighted to help you navigate internal wall insulation grants and have this work completed free of charge.

  • Government grants of up to 100% are available for internal wall insulation
  • Quick decision and turnaround
  • Trustmark approved installers
  • Energy saving funding experts

Why consider internal wall insulation? 

Internal wall insulation (IWI) is an excellent solution for boosting the warmth and energy efficiency of UK homes, especially for those without the option for cavity wall insulation. 

Picture giving your home’s interior walls receiving a thermal makeover, while also refining the look and feel of your living spaces. That’s the advantage of IWI, and it’s possible to have this transformative improvement carried out at no cost to you through internal wall insulation grants, if you meet the eligibility criteria. 

To help you better understand internal wall insulation, let’s take a look at the many benefits it has to offer.

Energy Efficiency and Cost Savings: Approximately 45% of all the heat lost from solid walled buildings escapes via the outside walls. If these walls are insulated from inside the building, the rate of heat loss will be reduced, your home will be kept warmer for longer and you will save money on your fuel bills. As well as keeping your property warmer in winter, the insulation will also help to make your home cooler during the summer.

Carbon Emission Reduction: Beyond the savings on fuel bills, IWI can reduce your carbon footprint significantly. For example, detached homes might see reductions of up to 1,500 kilograms in CO2 emissions each year.

Comfort and Noise Reduction: IWI contributes to a steadier indoor temperature, making your home more comfortable across all seasons. It also boosts sound insulation, creating a quieter and more serene living environment.

Aesthetic Enhancement and Value Increase: Implementing IWI can also improve the interior appearance of your home and potentially raise its market value, making it more attractive to prospective buyers.

Moisture Control: When installed correctly, IWI aids in controlling moisture and ventilation within the home, helping to prevent issues like condensation and mould, which are particularly common in older structures.

How does internal wall insulation work? 

Internal wall insulation works by adding a layer of insulation material to the internal surfaces of your external walls. This creates a barrier that reduces the transfer of heat from the inside to the outside. If your home rapidly loses heat during the winter months, you should notice a big difference in your comfort and energy costs by having internal wall insulation installed. 

The Installation Process

The installation process for internal wall insulation involves attaching rigid insulation boards directly to the wall or alternatively building a stud wall filled with insulating material adjacent to an existing wall.  Internal wall insulation is particularly suitable for properties of solid wall construction (eg solid brick and solid stone) which were built prior to the 1930s, or system built properties.  By tapping into internal wall insulation grants, you could benefit from this home improvement and enjoy all the comfort and cost benefits it has to offer.

Do I qualify for an internal wall insulation grant? 

If you are a homeowner or private tenant you could be eligible for an internal wall insulation grant. Our grant experts would be delighted to take you through the qualifying criteria and manage your application for you.  Unfortunately, we are unable to help people in social housing, so please speak to your housing provider in this instance. 

Is my home suitable for internal wall insulation? 

Before considering internal insulation grants, it’s essential to identify which properties are most suitable for internal wall insulation (IWI).

Solid Wall Properties: Buildings constructed before the 1930s are likely to have solid walls without cavities. These structures are prime candidates for IWI since there’s no gap between the walls to fill with insulation.

Homes Needing Interior Refurbishment: If the inside of your home requires updates or repairs, integrating IWI with these renovations can be an economical way to improve your home’s energy efficiency and comfort.

Our energy grants specialists are waiting to help you…

Energy Saving Grants offers free no-obligation advice on the Governments Energy Company Obligation (ECO) Scheme and other UK internal wall insulation grant schemes. Apply now by entering your property details in the Grant checker form below and an accredited energy assessor will contact you to discuss your enquiry. 

  • Free expert advice and application assistance
  • OFGEM energy saving grants schemes
  • No obligation
  • Quick and simple application 


Applying for internal wall insulation grants is as easy as

1. Eligibility Check: Fill out our form to find out if you’re eligible for ECO funding or other internal wall insulation grants. 2. Free Survey: A qualified energy assessor will give you a free evaluation, offering custom advice on how to save energy. 3. Installation: Our Trustmark-certified professionals will efficiently install your insulation, with the support of grant funding.

Improve Comfort and Reduce Costs with Government Grants for Internal Wall Insulation

Find out how to lower your heating costs and boost your home’s cosiness with government grants for internal wall insulation. Energy Saving Grants is on hand to steer homeowners through the maze of available funding options. We’re here to support you from identifying eligible grants to securing the necessary upgrades for your home. Reach out to our team or kickstart the process by completing our straightforward grant enquiry form today.

FAQ for Internal Wall Insulation Grants

A: There are various Government funding schemes available which are designed to help cut carbon dioxide emissions and also reduce fuel poverty in the UK. The insulation grant schemes include Internal wall insulation for solid wall properties. 

A: Generally, homeowners and in some cases private tenants can apply for internal wall insulation grants, depending on scheme requirements such as household income levels or property characteristics such as the type of heating in the property.

A: While savings can vary, installing internal wall insulation could significantly cut down on heat loss, potentially saving hundreds of pounds on heating bills each year.

A: Yes, typically homeowners are the main applicants, but private tenants may also apply with their landlord’s permission.

A: Unfortunately you cannot apply retrospectively for any work that has already been installed. It is a requirement to apply for a grant before starting any work.

A: It might slightly alter the interior dimensions and aesthetics of your home, but modern IWI techniques are designed to minimise this impact. Generally the total thickness of Internal Wall Insulation (including plasterboard) is 50mm to 70mm.

A: Homes without cavity walls, typically older properties, are most suitable. A professional assessment can confirm if IWI will be suitable for your home.

A: Start by filling in our eligibility form below – a qualified energy assessor will contact you to discuss your application and will advise on any grants that are available.

Installation involves attaching insulation boards to internal walls or building a stud wall filled with insulating material, which is then finished with plasterboard and plaster.

A: Yes, IWI can also improve sound insulation, reduce drafts, and manage moisture, enhancing overall home comfort.

Check Your Eligibility Using Our Grant Checker

Please ensure that all information provided below is 100% accurate. Any errors in your personal information could delay or prevent you qualifying for a government funded grant 

Please note that you do not necessarily need to be in receipt of tax credits or benefits as we still may be able to obtain funding for you via your Council or through other funding schemes.  

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