Solid Wall Insulation (IWI)


Internal Wall
Insulation Grants

Internal wall insulation can dramatically reduce the amount of warmth that escapes from a property thereby reducing energy bills and creating a warmer home.

Properties built prior to 1930 will most likely have solid walls. These typically allow more heat to pass through than a standard cavity wall, but can still be insulated.

Solid walls can be insulated from the inside. Typically this will cost more than insulating a standard cavity wall, but the savings on your heating bills will be bigger too.

Typical installation costs for a solid wall insulation is around £7,400, However this can be done for free under ECO3

*Based on a typical semi-detached house in Great Britain


3 Simple Steps

Use our simple online eligibility checker or call us on 0333 577 5852 and one of our friendly advisors will go through a straightforward evaluation process and advise you if you qualify for any ECO3 funding.
Once you've meet the criteria, we will arrange a free, no obligation home assessment survey, they will recommend the best eco measures to reduce your homes energy usage.
The installation of your free energy efficiency measures will be carried out by our experienced heating engineers, on a date to suit you.
Fully certified gas safe heating engineers perform all our boiler installations.

Frequently asked questions (FAQs)

Is internal wall insulation messy to install?

Internal wall insulation is disruptive but can be done room by room. Light fittings, radiators and pipework on internal walls will need to be removed and reattached so that they are flush with your new ‘wall’.
Leaving you with a freshly plastered interior wall.

Check your eligibility

Use our simple online form to find out if you qualify for government-backed ECO3 grants. 

Years of Experience
ECO Assessments
Installed Upgrades
Avg Household Savings (over 5 years)

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Eco-Home Network Logo

Eco-Home Network

Hollinwood Business Centre
Albert Street

Tel: 0333 577 5852


Office hours

Monday : 9am - 5pm
Tuesday : 9am - 5pm
Wednesday : 9am - 5pm
Thursday : 9am - 5pm
Friday : 9am - 5pm
Saturday : Closed
Sunday : Closed