Internal Wall Insulation

Free Internal Wall Insulation Grants

Get 100% Funded Wall Insulation for a Warmer, More Efficient Home

If your home qualifies under government-backed energy schemes, you could receive internal wall insulation completely free of charge. This insulation helps retain heat, reduce energy bills, and improve comfort throughout the year.

Check your eligibility

Why Pay for Internal Wall Insulation When You Can Get It Free?

The cost of internal wall insulation can range between £5,000 and £15,000, depending on your home’s size and layout. For many households, that’s a major expense—but the good news is, you don’t have to pay a penny. Through government-funded schemes like ECO4 and the Great British Insulation Scheme (GBIS), eligible homeowners can receive 100% free internal wall insulation.

These grants are designed to close the gap between outdated heating systems and modern energy efficiency standards, helping families enjoy warmer homes while significantly cutting energy bills. Best of all, the entire process—from the initial home survey to professional installation and final inspection—is fully covered. If you qualify, you can upgrade your home’s insulation, improve comfort, and reduce heating costs without spending anything out of pocket.

See if you qualify

Why Choose CarbonSync for Internal Wall Insulation?

When it comes to making your home more energy-efficient, CarbonSync stands out as a trusted partner for securing free internal wall insulation through government-backed grants. With years of industry experience, we specialise in helping homeowners access insulation funding quickly and hassle-free.

At CarbonSync, we manage the entire process—from checking your eligibility and conducting a free home survey to coordinating certified installers and completing post-installation inspections. Our goal is to make it as easy as possible for you to benefit from energy-saving upgrades without any upfront costs.

By choosing CarbonSync, you’re not only improving your home’s warmth and comfort—you’re also saving money and contributing to a greener future. With full grant coverage, fast installation, and a customer-first approach, we make internal wall insulation simple, accessible, and completely free for eligible households.

How CarbonSync Can Help You Get Free Internal Wall Insulation

Frequently Asked Questions (FAQs)

What is internal wall insulation?

Internal wall insulation is the process of adding a thermal barrier to the inside of solid walls to reduce heat loss and improve energy efficiency. This is typically done using rigid foam boards or stud wall systems filled with insulating materials. It’s an effective way to keep your home warmer and lower your heating costs.

Are internal wall insulation grants really free?

Yes. Through government-funded energy efficiency schemes like ECO4 and the Great British Insulation Scheme (GBIS), qualifying households can receive 100% free internal wall insulation, including materials and professional installation—with no hidden fees or upfront costs.

Who is eligible for an internal wall insulation grant?

You may be eligible if your home has a low Energy Performance Certificate (EPC) rating or if someone in the household receives qualifying government benefits. Council tax bands, household income, and other criteria may also be considered during the eligibility check.

How long does internal wall insulation last?

When installed by certified professionals, internal wall insulation can last 30 years or more with minimal maintenance. It provides long-term energy savings, increased comfort, and contributes to a more sustainable, eco-friendly home.

Benefits of Internal Wall Insulation

Internal wall insulation offers an excellent solution for improving energy efficiency in homes with solid walls. By insulating the internal surfaces of your property, you can significantly reduce heat loss, which leads to a warmer, more comfortable living environment all year round. This added thermal barrier helps your heating system work more efficiently, meaning you’ll use less energy and enjoy noticeable savings on your utility bills.

Beyond the financial benefits, internal wall insulation enhances your home’s overall comfort and reduces cold spots and draughts. It also plays a key role in lowering your carbon footprint, supporting the UK’s wider goal of reducing greenhouse gas emissions.

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Apply for Your Internal Wall Insulation Today!

Client’s Testimonials

Customer Testimonials

Angela M., Sheffield

A huge difference in just a few days!

"Before the insulation, our home always felt chilly—even with the heating on. Now, the warmth stays in much longer. CarbonSync handled everything, and it didn’t cost us a thing!"

Rizwan A., Leicester

Finally, a warm home—and lower bills!

"Thanks to CarbonSync, we now have internal wall insulation completely free. The team was professional, and we’ve already seen our energy usage drop. Highly recommended!"

Lauren G., Glasgow

Smooth process from start to finish.

"The survey was quick, and the installation team was very respectful and tidy. I was surprised this was all covered by a grant—CarbonSync made the process simple and stress-free."

Peter & Joan T., Newcastle

No more cold spots or draughts.

"We used to avoid certain rooms in winter because they were freezing. After getting the internal walls insulated through CarbonSync, the whole house feels much more comfortable."

Check Your Eligibility for the ECO4 Scheme