Internal Wall Insulation Grants

UK Government Funding for Free Internal Wall Insulation (IWI)

If your home is older or unsuitable for external insulation, internal wall insulation could be the perfect upgrade.

At Eltron Energy, we help eligible homeowners and tenants access 100% funded internal insulation upgrades that transform comfort, cut heating bills, and boost property value.

Check Your Eligibility

This is a government backed scheme    

Gov UK
What is Internal Wall Insulation?

What is Internal Wall Insulation?

Internal wall insulation (IWI) adds a thermal barrier to the inside of exterior-facing walls. This can involve fitting:

  • Insulation boards directly to walls, or
  • Timber stud walls filled with insulation material

Both methods improve thermal performance, reduce draughts, and protect your home from heat loss. Internal insulation is particularly useful in urban or listed buildings where external insulation isn’t an option.

Government Grants for Internal Wall Insulation

Thanks to the UK’s push for improved home energy efficiency, government grants for internal wall insulation are widely available in 2025. Two main schemes are:

  • ECO4 Scheme: Focuses on helping low-income and fuel-poor households.
  • Great British Insulation Scheme (GBIS): Targets homes with poor EPC ratings (D to G) or those in lower Council Tax bands.

These grants often cover up to 100% of insulation costs, making it a smart and affordable solution for energy savings.

Government Grants for Internal Wall Insulation

Who is Eligible for Internal Wall Insulation Grant?

You may qualify for an internal wall insulation grant if:

  • Your annual household income is £31,000 or less
  • You receive qualifying government benefits (e.g., Universal Credit, Pension Credit, ESA)
  • Your home has an EPC rating of D, E, F or G
  • Your property is in Council Tax Band A–D (England) or A–E (Scotland/Wales)
  • You own your home or rent privately (landlord permission required)

How to Apply for Internal Wall Insulation Grant with Eltron Energy

Getting started is simple:

Check Eligibility 

Use our online form to see if you qualify for free insulation.

Installation Arranged

We handle everything, from grant application to insulation installation.

Free Home Survey

Our experts inspect your property to confirm suitability.

Start Saving

Enjoy a warmer home and lower bills—without paying a penny upfront.

Apply Here for the Grant

Benefits of Internal Wall Insulation

  • Free expert advice
  • 100% government-backed funding
  • Approved ECO4 installers
  • Fast, professional installation
  • Over 1,000 homes upgraded and counting
  • No hidden fees or surprise costs
Benefits of Internal Wall Insulation

How Much Can Internal Wall Insulation Save?

Adding internal insulation significantly cuts heat loss and reduces your energy bills. Here’s what you could save annually based on your home type:

Property type

Annual energy savings

Apartment

£140 to £185

Terrace house

£175 to £240

Semi-detached house

£290 to £400

Detached house

£500 to £700

*These costs are averages based on the UK market.

Don’t miss out this opportunity!

Apply For Funding Now
Reviews from UK Homeowners about our IWI
A Fantastic Service!
“I couldn’t believe the insulation was completely free. Eltron Energy made the whole process easy and professional.”
Tom R., Liverpool
Warmth Back in Our Home
“The difference after insulation was incredible. The team was friendly and efficient.”
Priya M., Nottingham
Grateful Pensioner
“As a pensioner, this grant meant a lot. My home is so much warmer now, and I’m saving on bills!”
Edith W., Glasgow
Stress-Free Process
“Eltron handled everything from the survey to installation. I’m very happy with the results.”
Marcus B., Birmingham
Highly Recommended
“Professional service and noticeable warmth. I’d recommend Eltron Energy to anyone eligible.”
Sarah J., Cardiff

Frequently Asked Questions (FAQs)

Yes! The UK government provides internal wall insulation grants through schemes like ECO4 and GBIS to help homeowners and tenants insulate their homes at little or no cost.

Absolutely. It helps cut heating bills, reduces heat loss by up to 35%, improves property comfort, and increases your home’s value. For older or solid-wall homes, it’s a highly effective upgrade.

The most cost-effective method is using insulated plasterboard, especially when covered by a grant. It requires minimal structural change while offering strong thermal benefits.

You may be eligible if you:

  • Earn less than £31,000 annually
  • Receive qualifying benefits
  • Have a home with an EPC rating of D–G
  • Live in a qualifying Council Tax Band (A–D in England, A–E in Scotland/Wales)
  • Own or privately rent your property

It depends on the property. Internal wall insulation is ideal for homes where external insulation is not permitted due to planning restrictions or aesthetics.

With proper installation, it can last 30+ years with little to no maintenance.

No, not when properly installed. Our team uses breathable membranes and vapour barriers to prevent condensation.

Yes! You might also qualify for loft, cavity, or room-in-roof insulation grants under ECO4 or GBIS.

You Might Also Qualify For:

Cavity Wall Insulation Grants

Boiler Grants

Loft Insulation Grants

Storage Heater Grants

Air Source Heat Pump Grants

Eltron Energy – Your Trusted Partner for Heating & Insulation Grants in the UK

Check If You Qualify