Home Insulation
Internal Wall Insulation Services in London
Millions of households in the UK suffer from exorbitant energy bills due to their uninsulated solid walls.
Transform Your Home with Expert Internal Wall Insulation Services
Want to reduce energy consumption every year and make your home warmer? Our professional internal wall insulation services in London provide the most effective solutions to minimise heat loss, reduce energy bills, and improve the comfort of your home. Our internal wall insulation solutions are designed to suit all types of homes and properties. Contact us today and transform your home with our solutions.

What is Internal Wall Insulation?
Internal wall insulation (IWI) is a method of adding insulation to the inside of a wall. It’s also known as internal insulation.
Best suited for properties with solid walls in conservation areas where you cannot make changes to the property from the outside, or properties that are built with cavity walls.
Key Benefits of Internal Wall Insulation
- Lower Energy Bills – Reduce heat loss through insulated walls, leading to significant savings on energy costs.
- Consistent Warmth – Insulation eliminates cold spots, ensuring even temperature distribution throughout your home.
- Preserves Exterior Appearance – Ideal for listed buildings and conservation areas, maintaining the original exterior look.
- Noise Reduction – Minimise external noise for a quieter and more peaceful indoor environment.
- Eco-Friendly Solution – Reduced energy consumption helps lower your carbon footprint and supports a greener future.
- Customisable Finishes – Plaster or decorate insulated walls to match your home’s interior style. Suitable for all home shapes and sizes.
- Protection Against Damp and Condensation – Prevents moisture build-up, reducing the risk of dampness and related issues.
Why Choose Our Services?
- Certified team with decades of experience in delivering high-quality insulation solutions.
- PAS 2035 compliance
- Trustmark approved installers
- Provides 25 years of insurance-backed guarantee
- Provides 2 years of workmanship warranty
- Managed hundreds of IWI projects
Our Working Process
Initial Consultation
We discuss your insulation needs and requirements to understand your concerns and answer any questions you may have.
Customised Work Plan
We provide a detailed plan tailored to your property's size and specific insulation needs.
Expert Installation
Our certified professionals ensure high-quality workmanship.
Ongoing Support & Maintenance
We offer guidance and advice to help you maintain the effectiveness of your insulation whenever you need it.
What Internal Wall Insulation Grants Are Available?
The UK government offers several grants and schemes to make internal wall insulation more affordable, such as:
- Energy Company Obligation (ECO): Designed for low-income households with poorly insulated homes.
- ECO4 Grant: Available for properties with an EPC rating of E, F, or G.
- Great British Insulation Scheme (GBIS): Provides funding for eligible households to improve insulation.
Our team will assist you in checking eligibility and applying for these grants to help reduce your upfront costs.

Am I Eligible for an Internal Wall Insulation Grant?
Internal wall insulation grants in the UK, such as those offered through the ECO4 scheme, aim to improve home energy efficiency and lower heating costs. To qualify, you must meet specific criteria based on your property’s energy rating and household income.
- Energy Performance Certificate (EPC) Requirements
- Your property must have an EPC rating of E, F, or G, indicating poor energy efficiency. These homes are typically eligible for government support to improve insulation. If you’re unsure of your EPC rating, you can check it online via the UK Government website.
- Benefits and Income Requirements
- Applicants or tenants must receive certain government benefits to qualify for the “Help to Heat” scheme, including:
- Income-based Jobseeker’s Allowance (JSA)
- Income Support (IS)
- Pension Credit Guarantee Credit (PCGC)
- Universal Credit (UC)
- Housing Benefit, and more.
- Households receiving Child Benefit may also qualify, subject to income thresholds.
- Applicants or tenants must receive certain government benefits to qualify for the “Help to Heat” scheme, including:
- Property Type
- Internal wall insulation grants are primarily available for solid wall properties, as these homes lose more heat compared to those with cavity walls. Older homes, typically built before the 1930s, are best suited for this type of insulation.
- Additional Support for Low-Income Households
- These grants prioritise low-income households to reduce energy bills and carbon emissions.
To ensure eligibility and simplify the application process, consult with insulation experts or apply directly through approved schemes like ECO4. Take the first step towards a more energy-efficient home today!
The Great British Insulation Scheme (GBIS)
Eligibility for the scheme is divided into two main groups:
- General Group
- To qualify under this group, you must:
- Own or rent a property (homeowners, landlords, and tenants are eligible).
- Live in a property within Council Tax bands A to D in England (A to E in Scotland and Wales).
- Have an EPC rating of D to G.
- To qualify under this group, you must:
- Low-Income Group
- Eligibility for this group requires:
- Receipt of Qualifying Benefits (such as):
- Income-based Jobseeker’s Allowance (JSA)
- Income-related Employment and Support Allowance (ESA)
- Income Support
- Pension Credit (Guarantee Credit or Savings Credit)
- Working Tax Credit
- Child Tax Credit
- Universal Credit
- Housing Benefit
- Child Benefit (subject to income caps)
- EPC Rating: The property must have an EPC rating of D to G.
- Receipt of Qualifying Benefits (such as):
- Eligibility for this group requires:
Book Your Free Home Assessment Now!
Ready to improve your home’s insulation? Contact our experts for a free assessment today. Our certified and experienced team offers a no-obligation, free assessment. We are always at your service to recommend the best internal wall insulation service in London for your home.
Types of Materials We Use for Internal Wall Insulation
- Mineral Wool – Non-combustible, excellent for soundproofing and insulation.
- PIR (Polyisocyanurate) Boards – Slim profile with high thermal efficiency.
- SWIP Internal Wall Insulation (IWI) – A certified system-based insulation solution for solid or cavity walls.

Why We Use SWIP Material?
SWIP Internal Wall Insulation (IWI) provides a system-based approach to internal wall insulation. The system has been tested and certified to demonstrate that all components work together as designed to deliver the required performance.
The SWIP IWI System is designed for upgrading existing solid (or cavity) walls. It consists of thermally engineered composite studs and insulation slabs, which can be combined to provide greater thicknesses of high-performance thermal insulation than achievable by using a single thickness.
Frequently Asked Questions
Is internal wall insulation suitable for all homes?
Can I apply for grants?
How much does internal wall insulation cost?
How long does installation take?
Internal wall insulation usually takes 3 to 7 days, depending on the property size and installation complexity.
Does internal wall insulation reduce noise?
How do I maintain internal wall insulation?
Can older homes benefit from internal wall insulation?
Yes, internal wall insulation is especially beneficial for older homes that have solid walls, keeping your house warmer from the inside.