Energy Efficiency

Internal Wall Insulation Installers

Internal wall insulation is the most effective upgrade for older homes without a cavity.

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Energy Efficiency for Solid Wall Homes

Solid walls can lose up to 45% of household heat, making older properties some of the hardest to keep warm and efficient. Unlike cavity walls, they have no gap to fill, meaning traditional methods don’t work — but internal wall insulation offers a proven solution.

At Elite Energy, our internal wall insulation installers provide services across the North of England through both government grants and straightforward paid installs with finance options available. By fitting high-performance insulation boards or stud systems inside your walls, we stop draughts, improve thermal performance, and tackle cold rooms, damp, and rising heating costs at their source.

Every installation is carried out in-house by accredited specialists using eco-friendly insulation materials designed for long-term energy efficiency. It’s a long-term investment that reduces heating bills, eliminates cold spots, and brings older properties up to modern performance standards.

What Is Internal Wall Insulation & Why It’s Needed

Unlike modern cavity walls, many UK homes built before the 1930s have solid brick walls with no gap for traditional insulation. These walls lose heat quickly, leading to higher bills, persistent draughts, and cold internal surfaces where condensation and mould often form.

Internal wall insulation services solve this by fixing insulation boards or stud systems with mineral wool to the inside of external walls. The added layer creates a thermal barrier, slowing heat transfer and keeping rooms warmer for longer.

This approach is especially valuable for:

  • Properties in conservation areas or listed buildings.

  • Homes with persistent condensation or cold spots caused by uninsulated solid walls.

  • Older houses where energy performance needs upgrading to meet EPC standards.

By addressing heat loss at the wall surface, internal wall insulation provides a long-term solution that improves thermal performance, reduces energy waste, and makes living spaces healthier and more stable throughout the year.

Internal Wall Insulation Pricing & Savings

Installing internal wall insulation is a more involved process than cavity or loft insulation, as it requires fitting insulation boards or stud systems directly to the inside of external walls. Costs for private installations start from £100 per m², with the final figure confirmed after a detailed survey of your property.

Average Installation Costs:

  • Detached: From £8,000 with typical annual savings of £400–£455.

  • Semi-Detached: From £6,000 with typical annual savings of £300–£350.

  • Terraced: From £4,500 with typical annual savings of £220–£280.

While the upfront investment is higher than other insulation services, the long-term benefits are significant. Internal wall insulation can last for decades, saving thousands in heating costs, improving EPC ratings, and increasing property value.

For households that prefer not to cover the full cost at once, finance options are available to spread payments into manageable instalments.

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Internal Wall Insulation Grants

Through the ECO4 scheme and the Great British Insulation Scheme (GBIS), many households can access free or heavily subsidised internal wall insulation. Both internal wall insulation grants are designed to make homes warmer, cut energy bills, and raise overall energy efficiency standards.

In the majority of cases, qualifying households receive free internal wall insulation, with only rare exceptions where partial funding applies.

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ECO4 Scheme

ECO4 funding supports low-income and vulnerable households living in energy-inefficient properties. If your home has solid walls and a low EPC rating, ECO4 will typically cover the full cost of installation, including surveys, insulation materials, and labour.

GBIS Scheme

GBIS has broader eligibility, often linked to council tax bands and household income. While some homes may contribute a small share of the cost, in most cases internal wall insulation is fully funded, allowing properties with poor insulation to be upgraded at little or no expense to the homeowner.

Problems Solved by Internal Wall Insulation

Homes with solid walls lose heat faster than cavity wall properties, leading to cold bedrooms, damp corners, and heating systems working overtime. Internal wall insulation tackles these problems at the source, providing targeted solutions for everyday issues:

Cold rooms in winter
Solid walls leak heat quickly, leaving living spaces cold. Insulation traps warmth inside, making rooms consistently warmer.

High heating bills
Energy escapes through untreated walls, forcing systems to work harder. Internal wall insulation cuts this waste, lowering annual costs.

Condensation and damp patches
Warm air meeting cold wall surfaces causes moisture build-up. Insulated walls reduce the risk of mould and damp-related damage.

Noise from neighbouring properties
Insulation adds density to walls, softening airborne noise and creating quieter living spaces.

Uneven temperatures across the home
Some rooms feel draughty while others overheat. Internal insulation helps balance conditions throughout the property.

Limited property value
Homes with poor EPC ratings can be harder to sell or let. Improved energy efficiency supports compliance for landlords and boosts resale value

Step-by-Step Installation Process

Every project is managed by our in-house internal wall insulation installers, with careful planning to minimise disruption and deliver long-term results. Typical timelines range from 3 to 7 days, depending on property size and the number of rooms being upgraded.

Our process improves energy efficiency while leaving homeowners with a refreshed internal surface, making it an ideal upgrade to pair with redecoration or renovation projects.

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  • 1

    Survey & Planning

    A trained surveyor assesses all solid wall areas, checks for damp or structural issues, measures room layouts, and recommends the most suitable internal wall insulation system for each space.

  • 2

    Preparation

    Fixtures, fittings, and radiators are removed where required. Wall surfaces are cleaned, levelled, and prepared to ensure the insulation system bonds correctly and performs as intended.

  • 3

    Insulation Installation

    High-performance insulation boards or stud systems with mineral wool are fitted directly to internal walls, maximising thermal efficiency and reducing cold spots throughout the property.

  • 4

    Plastering, Reinstatement & Final Checks

    A fresh plaster finish is applied, ready for redecorating. Skirting boards, sockets, and radiators are reinstated, followed by full ventilation checks and a final inspection to confirm complete coverage and compliance.

Managing Space, Disruption & Finish Quality

Installing internal wall insulation does change the layout of a room, but with the right planning it becomes a smooth process that adds value as well as warmth.

Our approach improves thermal performance while leaving walls with a smooth, newly plastered surface, ready for decoration. Many households choose to align insulation work with planned redecorating, reducing future disruption and maximising the benefit of the installation.

Space Impact

Space Impact

Insulation boards typically reduce floor area by around 60mm per wall. In most homes this is minimal, but it should be considered in smaller rooms or where furniture is tight against walls.

Disruption

Disruption

Installation takes 3-7 days depending on the number of rooms. Radiators, skirting, and sockets are temporarily removed, with our team ensuring they are reinstated correctly once insulation is fitted.

Finish Quality

Finish Quality

Walls are plastered and left ready for decoration, giving a fresh surface that many homeowners use as an opportunity to redecorate or modernise interiors.

Why Homeowners Choose Elite Energy

Internal wall insulation requires precision to ensure thermal performance, room finish, and long-term results. At Elite Energy, our installers specialise in solid wall properties, providing expertise that goes beyond standard insulation services.

  • Solid wall expertise: Our team works daily with properties where cavity wall insulation isn’t suitable, ensuring installations meet both energy and aesthetic expectations.

  • Certified quality: Installations are carried out under TrustMark and ISO standards, supported by ECO4 and GBIS accreditation, and protected with a 25-year guarantee.

  • In-house delivery: From survey to final plastering, everything is managed by our own installers,  no subcontractors involved.

  • Connected services: Many households combine internal wall insulation with loft insulation for upstairs rooms, underfloor insulation for ground floors, or external wall insulation where planning allows, creating a whole-home solution.

  • Proven value: Beyond lower bills, improved EPC ratings and warmer rooms add measurable value for both homeowners and landlords.

Choosing Elite Energy means working with insulation contractors who are experienced in the complexities of solid wall homes, ensuring the end result is efficient, resilient, and finished to a high standard. Chat with our team today to discuss your home, your options, and the best insulation route for your property.

What to Expect After Approval

Applying for internal wall insulation, whether through a grant or a private install, follows a clear sequence that we manage entirely in-house.

Grant Installs

Grant Installs

Once you complete our eligibility check, we confirm your details against ECO4 or GBIS requirements, handle the paperwork, and guide you through approvals. Installations are typically scheduled within 4–6 weeks of confirmation.

Paid Projects

Paid Projects

We arrange a survey at a convenient time, provide a fixed written quote, and discuss finance options if required. Work is usually booked within weeks, depending on the number of rooms being insulated.

During Installation

During Installation

Our team manages everything on site, from preparation and fitting to plastering and reinstating radiators, sockets, and skirting. We keep disruption controlled and ensure rooms are left ready for decorating.

After Completion

After Completion

You receive documentation of compliance, long-term guarantees, and guidance on maintaining thermal performance.

Trusted Internal Wall Insulation Installers

Upgrading solid walls with internal wall insulation is one of the most effective ways to cut heat loss, stabilise room temperatures, and protect your property from dampness.

With ECO4 and GBIS grants making it free for many households, and finance available for private installs, there’s an option to suit every home.

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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 much space will I lose with internal wall insulation?

Insulation boards typically reduce room size by around 60mm per wall. In most homes this is barely noticeable, but in smaller rooms it can impact layout. During the survey, we highlight exactly how much space will be affected and suggest ways to minimise disruption.

Do I need to redecorate after installation?

Yes. Once insulation boards and plaster finishes are in place, walls are ready for decoration. Many households plan insulation work alongside redecoration or renovation projects to reduce disruption and make the most of the refreshed wall surfaces.

How long does internal wall insulation take to install?

Installation times vary depending on the number of rooms. A single room can be completed in a few days, while a whole-house project typically takes 3-7 days. Our team confirms timelines during the survey so you know exactly what to expect.

Will internal wall insulation reduce damp problems?

Yes. By warming wall surfaces, insulation reduces condensation build-up that causes damp patches and mould. However, if your home already has significant damp issues, these must be resolved before insulation is installed to ensure long-term performance.

What materials are used in internal wall insulation?

We use high-performance insulation boards or stud systems with mineral wool infill. These materials are chosen for their strong thermal insulation, eco-friendly properties, and ability to stabilise humidity, creating healthier indoor conditions.

Can insulation improve my EPC rating?

Yes. Insulating solid walls is one of the most effective upgrades for boosting EPC scores. This helps homeowners reduce energy bills, supports landlords in meeting compliance, and can increase property resale value.

Is finance available if I don’t qualify for grants?

Yes. If you don’t qualify for internal wall insulation grants, we provide finance options that allow you to spread the cost into manageable monthly payments, making upgrades more accessible.

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