Internal Wall Insulation – Improve Comfort & Cut Energy Bills
What is internal wall insulation?
Internal Wall Insulation (IWI) improves your home’s energy efficiency by adding insulating material to the inside of external walls. A finishing layer—usually plasterboard—is then applied, providing extra thermal and acoustic benefits while giving your walls a fresh, modern appearance. The plasterboard is plastered afterwards, making the surface ready for decorating.
This type of insulation is especially well‑suited to older properties, homes with solid walls, where external wall insulation isn’t practical.
Could you get help with the cost?
Many homeowners and landlords could be eligible for ECO4 funding, a UK government scheme that helps cover the cost of energy efficiency projects.
Get in touch with our team today to see if you qualify and discuss your options.
Internal wall insulation FAQs
Which homes are suitable?
Internal wall insulation can work in almost any property but is most beneficial for solid wall homes where cavity wall insulation isn’t possible.
Will it reduce room size?
Installing internal wall insulation reduces room size by around 100‑130 mm – but it also improves energy efficiency, helps cut bills and can increase property value. Plus, the outside look of your home remains unchanged.
How much does it cost?
Costs vary depending on the number and size of walls to be insulated. Kitchens and bathrooms are often excluded to avoid the cost of removing units and fixtures.
✅ All our work comes with a 25‑year guarantee
✅ We partner with trusted installers and help you explore ECO4 funding to reduce or cover your costs
Benefits of internal wall insulation
✅ Reduce condensation risk – by keeping walls warmer inside
✅ Keep rooms cosier – improved comfort in every season
✅ Lower energy bills – cut heat loss and save up to 35% on heating costs
✅ Preserve your home’s exterior – no changes to the outside appearance
Ready to make your home warmer and more efficient?
Get in touch today to discover how internal wall insulation could help lower your bills and improve comfort – and discuss your options with one of our experts.
📞 Call us on 0333 577 3707
📧 Email us at info@emt.services