Cavity Wall Insulation

Cavity Wall Insulation Installers

Stop heat escaping through your walls and keep warmth where it’s needed most.

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Grants, Paid Installs & Finance Options Available

Up to 35% of your home’s heat is lost through uninsulated walls, driving higher bills and leaving rooms cold and damp. Cavity wall insulation stops this energy waste, improves thermal efficiency, and creates a healthier, more comfortable living space.

At Elite Energy, we provide cavity wall insulation through government grants (ECO4 and GBIS) as well as paid installations with finance available. No matter your route, our accredited team ensures your walls are insulated to the highest standard with long-lasting results.

Why Choose Cavity Wall Insulation?

Uninsulated cavity walls are one of the biggest sources of heat loss in UK homes. They allow warmth to escape straight through the walls, leaving heating systems working harder and energy bills climbing year after year. Cavity wall insulation provides a long-term fix by targeting this problem at its source.

The process involves filling the wall gap with specialist insulation materials that trap warmth inside while still allowing the property to breathe. It’s a proven way to improve the thermal insulation of your home, boost overall energy efficiency, and create the foundation for a healthier living environment.

As one of the most cost-effective insulation services available, it’s often the first step homeowners take in making their property more energy-efficient and future-ready.

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Do You Have Cavity Walls? Here’s How to Check

Identifying whether your property has cavity walls is straightforward:

  • Property age: Homes built after the 1920s are usually cavity wall, while older homes are more likely to be solid wall.

  • Brick pattern: Cavity walls often show only the long side of each brick in a uniform pattern. A mix of long and short sides suggests solid walls.

  • Wall thickness: Cavity walls are generally 270mm thick or more. Solid walls are typically around 220mm.

  • Condition: Any cracks, damp patches, or structural problems should be resolved before insulation is installed.

For homes without cavity walls, other solutions such as internal wall insulation are more appropriate.

How Our Cavity Wall Installation Works

Every cavity wall insulation project is handled in-house by Elite Energy’s accredited team, with clear steps from start to finish. The process is designed to be fast, low-disruption, and fully compliant with industry standards.

  • Free Home Survey: Property assessed to confirm cavity walls, check ventilation, and identify damp or structural issues.

  • Preparation: 22mm drill holes made in a diamond pattern, with protective coverings used to safeguard surfaces.

  • Injection: Blown mineral wool insulation injected under controlled pressure to ensure even coverage and reliable thermal performance.

  • Sealing & Finishing: Drill holes sealed with mortar, colour-matched to blend with the existing wall finish.

  • Final Quality Checks: Ventilation and heating appliances tested, post-install inspection completed, and a 25-year CIGA guarantee issued.

Our Cavity Wall Insulation Services

At Elite Energy, our cavity wall insulation installers provide both grant-funded and paid options, making the upgrade accessible for every type of homeowner. In addition to cavity wall insulation services, we also deliver whole-home improvements including loft, floor, and room in roof insulation, along with renewable energy solutions.

Private Installations

Private Installations

Straightforward paid options with finance plans available for those not covered by grants.

Free Cavity Wall Insulation

Free Cavity Wall Insulation

Full installations through the ECO4 and GBIS schemes where households qualify.

Accredited Materials

Accredited Materials

We use blown mineral wool for its proven thermal performance, moisture resistance, and long-term reliability.

Compliance Checks

Compliance Checks

Every installation carries a 25-year CIGA guarantee, backed by TrustMark and ISO certification.

Cavity Wall Insulation Costs & Savings

Installing cavity wall insulation is an investment that quickly pays for itself through reduced energy bills. We offer clear, upfront pricing for private installations, starting from just £20 per square metre. Final costs are confirmed after a home survey to account for property size and structure.

  • Detached: Prices from £4,600 (approx. £20/m²) with typical annual savings of £370-£420.

  • Semi-Detached: Prices from £2,700 (approx. £20/m²) with typical annual savings of £250-£300.

  • Terraced: Prices from £1,800 (approx. £20/m²) with typical annual savings of £180-£250.

Finance options are available, making it easier to spread the cost of installation. The exact figure for your property will always be confirmed in advance following a detailed survey.

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Government Grants for Cavity Wall Insulation

Through ECO4 and the Great British Insulation Scheme (GBIS), many UK households can have their cavity wall insulation fully funded.

Both schemes are designed to improve energy efficiency, lower heating costs, and make homes warmer for the long term. If your property qualifies, you’ll either pay nothing at all or, in limited cases, a smaller share of the installation cost.

Use our funding eligibility checker to see exactly what you qualify for.

ECO4 Scheme

Supports low-income and vulnerable households. When eligible, it typically covers the entire cost of installation, including surveys and materials.

GBIS Scheme

Offers broader eligibility across income levels. Most households that qualify have their insulation fully funded, though in rare cases a reduced contribution may be required.

Solving Problems with Cavity Wall Insulation

Homes with uninsulated walls lose a significant amount of heat, leading to higher bills, damp patches, and uneven room temperatures. Installing cavity wall insulation addresses these issues directly:

  • 1

    Warmer Walls & Reduced Damp

    Insulation warms internal wall surfaces, preventing condensation, damp patches, black mould, and the musty smells that often come with them.

  • 2

    Lower Heating Bills & Less Boiler Strain

    With up to a third of heat escaping through uninsulated walls, filling the cavity reduces energy waste, brings bills under control, and cuts the need for constant heating.

  • 3

    More Even Temperatures

    Insulated walls stabilise heat levels between floors and eliminate cold corners, resolving the common issue of warm upstairs and cold downstairs.

  • 4

    Better Living Conditions & Higher Efficiency

    Added wall density helps soften external noise, while improved thermal performance boosts EPC ratings, increases property value and supports rental compliance.

Why Homeowners Choose Elite Energy

Choosing the right installer is as important as the insulation itself. With Elite Energy, every project is handled by accredited specialists who deliver both funded and private installs to the same high standard.

  • Nationwide coverage: From the North East and North West to Scotland, Wales, and the Midlands, our in-house teams provide local support backed by national resources.

  • Certified expertise: All work is backed by the 25-year CIGA guarantee, TrustMark registration, ISO certification, and accreditation under ECO4 and GBIS schemes.

  • No subcontractors: Every survey and installation is carried out by Elite Energy engineers, ensuring consistent quality and accountability.

  • Whole-home solutions: Beyond cavity wall insulation, we provide loft, internal wall, underfloor, room-in-roof, and external wall upgrades, as well as boilers and solar.

  • Proven track record: Thousands of households have already reduced bills and improved efficiency with our help.

What Happens After You Apply?

The next steps depend on whether you’re applying for a grant or booking a paid installation, but in both cases, the process is straightforward and fully managed by our team.

From paperwork to final checks, every stage is handled in-house by accredited engineers, so you always know who you’re dealing with and what comes next.

Paid Installations

We arrange a home survey, provide a fixed written quote, and discuss finance options if required. Once agreed, installation is scheduled within weeks.

Grant-Funded Installations

We confirm eligibility, complete all funding applications on your behalf, and schedule installation once approval is received, usually within 4-6 weeks.

Work with Trusted Cavity Wall Insulation Installers

Cavity wall insulation is one of the fastest ways to cut heat loss, stabilise room temperatures, and lower annual bills. With full grants available through ECO4 and GBIS, or affordable finance for private installs, there’s an option to suit every household. Grants can make it free, finance makes it affordable.

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Frequently Asked Questions

We have tried to answer most questions here but if you have any other queries please feel free to contact us!

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How long does cavity wall insulation last?

Properly installed insulation can perform for 40 years or more. With CIGA’s 25-year guarantee, you have long-term assurance of quality and performance.

What type of insulation do you install in cavity walls?

We use blown mineral wool, chosen for its high thermal performance, moisture resistance, and fire safety rating. It’s certified for UK homes and widely recognised as the industry standard.

How disruptive is the installation process?

Disruption is minimal. Installation is carried out from the outside, meaning no need to enter living spaces. Work is usually completed in less than a day, with drill holes sealed to blend with your existing brickwork.

Will cavity wall insulation reduce condensation and mould?

Yes. By keeping internal walls warmer, insulation reduces the chance of moisture forming on cold surfaces. This helps prevent condensation and the mould growth that often follows.

Can I still have cavity wall insulation if I don’t qualify for a grant?

Absolutely. Paid installations start from £20 per square metre, and finance is available. Many households who don’t meet grant criteria still find the investment pays for itself quickly through annual energy savings.

Is cavity wall insulation suitable for all property types?

Not always. Some properties with narrow cavities, structural damage, or severe damp may not be suitable. In these cases, alternative solutions such as internal or external wall insulation may be better options.

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