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External Wall Insulation Grants
At Cucumber Eco, we help landlords and tenants access fully funded external wall insulation grants through the ECO4 scheme. Whether you live in a period property or a modern build, our expert team takes care of everything. From eligibility checks to professional installation; improving your property’s energy efficiency and appearance without any cost to you.
We’ve been transforming homes across the UK, one wall at a time and we’re just getting started.
Our approach is straightforward: we make sure every client gets the best insulation solution for their home. With expert assessors and trusted installers, we ensure your property stays warm, energy-efficient and compliant with future regulations without lifting a finger.
The process for getting external wall insulation grants is quick and simple:
- Fast Eligibility Check
- Free Property Assessment by Certified Experts
- Professional Installation With No Cost To You
Are external wall insulation grants really free?
Yes! If you qualify for the ECO4 scheme, your external wall insulation will be fully funded, with no costs involved at any point.
How long does the installation take?
Most external wall insulation jobs are completed within a few days, depending on the size and complexity of your property. We always aim to minimise disruption.
Will it change the appearance of my property?
Yes, but in a good way! External wall insulation can be finished in various styles and colours to improve your home’s look, while also enhancing its energy efficiency.
Can tenants apply for external wall insulation?
Definitely! If you're renting, you can apply through us, and we’ll work directly with your landlord to ensure everything runs smoothly.
What is external wall insulation?
External wall insulation (EWI) involves fixing an insulating layer to the outside walls of your home, then covering it with a protective render or cladding. This greatly improves warmth and can refresh the appearance of your property.
Can I get external wall insulation for free?
Yes, through the government’s ECO4 scheme. Qualifying households can often receive fully funded EWI. Because it is a more expensive measure, some properties may require a small contribution, but in many cases the grant covers the full cost.
Who qualifies for external wall insulation grants?
You receive certain benefits (e.g. Universal Credit, Pension Credit).
You are referred via ECO Flex by your local council (for low-income or vulnerable households not on benefits).
Your property has an EPC rating of D–G and suitable solid or uninsulated external walls.
Why would I need external wall insulation instead of cavity wall insulation?
Homes built before the 1920s typically have solid walls with no cavity to fill. In these cases, external wall insulation is the most effective way to prevent heat loss.
What about private tenants and landlords?
Private tenants can benefit, but the landlord’s permission is required. For landlords, EWI can significantly improve EPC ratings, helping meet Minimum Energy Efficiency Standards (MEES) and boosting property value.
How is external wall insulation installed?
Installers fix insulating boards to the outside walls, apply a reinforcing mesh, and finish with render or cladding. This can change the look of your home, and planning permission may be needed in some cases (especially for listed buildings or conservation areas).
Is external wall insulation guaranteed?
Yes. ECO4-funded EWI installations must be carried out by TrustMark-registered, PAS-accredited installers and come with an industry-recognised guarantee for long-term protection.
Will it cause disruption?
Work is done entirely on the outside, so disruption inside your home is minimal. The process typically takes 1–2 weeks, depending on property size.
Can I combine external wall insulation with other measures?
Yes, under ECO4, EWI is often installed alongside other upgrades such as loft insulation, new heating systems, or solar panels as part of a whole-house retrofit.
How does ECO4 funding compare to GBIS?
ECO4: Best suited for low-income / fuel-poor homes needing whole-house upgrades, including external wall insulation.
GBIS: Offers single insulation measures to households in certain Council Tax bands (A–D in England, A–E in Scotland/Wales), though EWI is less common due to its higher cost.
How do I apply for external wall insulation grants?
Contact an approved ECO4 installer (like us). We’ll confirm your eligibility, arrange a free survey, and handle all the grant paperwork and permissions needed.