Cavity Wall Insulation: A Smarter Way to Keep Your Home Warm

We install insulation that blends efficiency with comfort, ensuring every wall in your home supports lower bills and warmer living spaces.

Insulate Your Walls – Retain the Warmth. Lower Your Bills.

Cavity walls could be responsible for up to 35% of your home’s heat loss. Our expert insulation service seals that gap—efficiently, affordably, and often for free under government grants.

Lay the foundations for successful insulation

Wall Structure Assessment & Preparation

Create a comfortable living environment

Select the right insulation system for your home

Check my Eligibility

Why Cavity Wall Insulation?

The best time to improve your home’s energy efficiency is now. Loft and wall insulation help reduce heat loss and lower your energy bills significantly.

Major Heat Loss

Up to 35% of your home’s warmth escapes through uninsulated walls. Causing lower temperatures

Lower Energy Bills

Improve thermal efficiency and reduce reliance on central heating. to lower your Energy bills

Eco-Friendly Living

Shrink your carbon footprint and boost your EPC rating. We can help you in this process.

Invisible Improvement

Installed from outside, with no disruption to your living space. So, you can continue whetever is your work.

Accredited & Certified

We are certified by TrustMark, MCS, and Gas Safe — ensuring quality, safety, and compliance with the UK’s leading insulation and heating standards.

Free Eligibility Checks

Our team takes care of all the paperwork for ECO4, GBIS, and BUS grants, so you can focus on getting your home warmer without the stress and any worries.

We are a Full-Service Firm

From council flats to family homes, we’ve successfully upgraded hundreds of lofts across the UK. with trusted insulation solutions.

Our approach

Let’s Help You Seal Comfort Into Your Walls.

With Energy Green Insulation Ltd, our cavity wall insulation is more than just a home upgrade — it’s a long-term investment in warmth and savings. Backed by government schemes and certified installers, we ensure your home retains more heat while cutting down on energy costs.

Strategy and Planning

The first step toward cavity wall insulation is identifying your wall type and heat loss levels. Our experts carry out a free survey using thermal imaging tools to assess suitability, cavity depth, for eligibility for funded installation.

Business Structure Development

Startups have to execute multiple items simultaneous. Consultants can help assisting clients execute major critical steps in the early stages of the business. Quisque consectetur purus ut suscipit faucibus.

Tailored Insulation Plan

No two homes are the same. Based on your survey results, we develop a customized insulation approach for your walls. Whether it’s partial filling, full cavity insulation, or topping up older materials.

how it works?

Our Cavity wall Insulation Process

We follow a clear and professional step-by-step method to ensure your wall is insulated properly — quickly, safely, and grant-eligible.

Free Home Survey

We assess wall cavity depth, exposure, and grant eligibility to make sure its done well.

Insulation Plan

You’ll receive a tailored solution with timeline and material info so you will all information about process.

Clean Installation

Injection through small external holes with minimal disruption. This will make it clean and effective.

Post-Install Check

We verify the installation, share aftercare tips, and help with any grant finalization paperwork.

Let’s Collaborate with Us!

Energy Green Insulation Ltd.
20 Emerald Road Luton, LU4 0NR, UK

Send mail: info@energygreeninsulation.co.uk
Call us: +44 (800) 193-1949

Frequently Asked Questions

Some frequently asked questions about the service that you may have questions about

Will cavity wall insulation reduce my energy bills significantly?

Yes, properly installed cavity wall insulation can lead to noticeable savings on your heating bills. According to the Energy Saving Trust, insulating your cavity walls can save an average semi-detached home around £300–£400 annually. By preventing heat from escaping through your walls, your heating system works more efficiently, reducing both your energy usage and carbon footprint. Over time, these savings can more than cover the cost of the installation—especially if your insulation is grant-funded under schemes like ECO4 or GBIS.

How long does cavity wall insulation take to install?

Most installations are completed within 2 to 4 hours, depending on the property’s size, number of external walls, and access points. Our team uses professional-grade tools to drill small entry holes in the mortar lines, inject insulation, and reseal everything to match the existing wall finish. For detached or larger homes, the process may take longer, but we always aim to complete the job within a single day with minimal disruption.

Will there be any mess?

The entire process is done from the outside of your home, meaning there is no disruption to your interior décor or furniture. While we do drill small access points in the external walls, we ensure that all debris is collected, the wall is neatly repointed after filling, and the area is thoroughly cleaned before we leave. Our installers are trained to follow a “leave no trace” approach, maintaining your home's curb appeal.

Can I get a grant for this?

Yes! Through the ECO4 (Energy Company Obligation) and GBIS (Great British Insulation Scheme), many homeowners and tenants are eligible for free or heavily subsidized cavity wall insulation. Eligibility typically depends on property type, current insulation status, and income-based or benefit-related criteria. We offer free eligibility checks, and if you qualify, we’ll take care of the entire application and paperwork for you.

Is it safe for older buildings?

Absolutely—but with care. We conduct a thorough pre-installation survey to evaluate factors like wall condition, damp risks, ventilation, and exposure level. Older buildings with solid walls or existing damp issues may not be suitable for traditional cavity insulation; in such cases, our experts will recommend alternate solutions or improvements first. Your building’s health and safety always come first in our assessments.

How can I check if my walls are suitable?

It’s simple—book a free on-site survey with our qualified surveyors. Using inspection tools like borescopes or thermal imaging, we assess your wall type, existing insulation (if any), cavity width, and signs of damp. We then explain our findings clearly and recommend the best course of action. You’ll receive a detailed suitability report, so you’re fully informed before proceeding.

Energy Green Insulation – Get Free Insulation with ECO4 Scheme Lower Your Energy Bills Today Check Your Eligibility in Minutes Improve Home Energy Efficiency Government-Backed Funding Available