Free Cavity Wall Insulation

Get free cavity wall insulation and loft insulation grants

Energy Company Obligation Update 2024

The ECO grant scheme is now restricted to properties that are off the gas grid and have a low energy rating. Eligible households can benefit from free cavity wall insulation, a 100% grant for solar panels or an air source heat pump.

Free cavity wall insulationLoft insulation grants are available in your area if you qualify through the government ECO scheme. The Energy Company Obligation is designed to tackle carbon emissions and fuel poverty by improving the energy efficiency of residential properties throughout Scotland.

Grant eligibility check
Free Cavity Wall Insulation

Installing cavity wall insulation is like putting a coat on your house. The insulation keeps the heat in, meaning that you can have your central heating on for less time or turn it down to a lower level. This costs you less in gas and fuel bills and reduces harmful emissions that are released into the environment. Cavity wall insulation also keeps your home cooler in the summer.

The cavity wall insulation that is installed through the wall insulation grant scheme is made of a man made fibre similar to loft insulation, but finely chopped so as to fit in between your walls. It is moisture proof and cannot pass dampness from your exterior wall to the interior wall via the cavity.

What are the benefits of cavity wall insulation?

Cavity Wall Insulation
Cavity Wall Insulation

Cavity wall insulation stops heat escaping out through the walls of your home. Around 35% of the heat in the average home is lost through the outer walls of the house. Under the current Government Insulation Grants Scheme, hundreds of thousands of Scottish and UK homeowners, landlords and private tenants qualify for a grant for cavity wall insulation.

If your home was built after 1920, it probably has walls  with a gap or cavity between them. Wall insulation fills that gap, keeping the warmth in to save energy. It can also help reduce condensation inside the house if this is a problem on your external walls.

How much can you save?

 DetachedSemi detachedMid terraceBungalowFlat
Fuel bill savings (£/year) £225 £150 £95 £105 £70
Typical installation cost £720 £475 £370 £430 £330
Payback time5 Years or fewer
Carbon dioxide savings (kgCO2/year) 1,120 kg 670 kg 410 kg 450 kg 310 kg
These are estimated figures based on insulating a gas-heated home. The average installed cost is unsubsidised. figures are based on fuel prices as of April 2017.
Energy Savings Trust
Cavity wall insulation savings

Wall Insulation FAQ’s

Is my home suitable for cavity wall insulation?

If your house was built between the 1920’s and the 1990’s it is likely that your exterior walls have a double skin of bricks with a cavity, or gap, between them. Houses built before this period were built with solid stone. Any residential properties built later are likely to have insulation already installed.

What material is used to insulate walls?

There are three main types of materials used to insulate walls. Polystyrene beads, mineral wool fibre and foam insulation. Although all three are manufactured to British building standards, foam is rarely used now to insulate residential properties.

How can I tell if my walls have a cavity?

You can tell the type of walls you have by measuring the thickness of the wall near the door. If it is 260mm or more, then you probably have a cavity. Another way is to look at the pattern of the bricks on your walls. The diagram below shows how cavity walls have a regular brick pattern so as to leave a gap in between the brick leaves. Solid walls have an alternative pattern as no space is required in between the bricks.

Cavity & Solid Wall brick patterns
Cavity & Solid Wall brick patterns

Do I already have cavity wall insulation?

If you think you already have cavity wall insulation, it is recommended that you ask an approved surveyor to check. It is a simple process. Fill out the Insulation enquiry form for more information.

How do I get free wall insulation?

Getting free insulation is a straightforward process. You can arrange an appointment with an authorised energy grants surveyor by  entering your details in the insulation grant enquiry form below.

A certified and approved insulation surveyor will then contact you to arrange a cavity wall survey. This involves drilling a small hole in your external wall and looking inside with a boroscope to see if your walls have a cavity and if they already have insulation.

The surveyor will then fill out a grant application and the cavity wall insulation company will then come and fill your walls. All costs are covered through the ECO4 Scheme.

Finding an approved insulation installer in your area

If you are unsure whether your home is suitable for wall insulation let us know and we can arrange a free no obligation survey with an approved energy assessor. The assessor will drill a small hole in one of your elevations. By using specialised camera equipment called a borescope, the surveyor will check to see if you already have insulation in your walls and advise if you are eligible for a government insulation grant.

Apply for a free cavity wall insulation grant

ECO4 Scheme Eligibility Check

ECO4 Scheme Eligibility Check

Does a member of your household claim any of the following benefits? (select all that apply)

"If you or a member of your household claim child benefit your TOTAL HOUSEHOLD INCOME must be below a certain threshold.

If you do not claim any other benefits please visit the following link to find out more about child income thresholds.

ECO4 Child Benefit Grants>>

What type of home improvement grant interests you? (All measures are free of charge)

Type of grant you are interested in (check all that apply)

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