Solid Wall Insulation: Internal & External
Transform your home with solid wall insulation! It's a game-changer for making your space warmer, quieter, and more energy-efficient.
What is Solid Wall Insulation?
Homes built before the 1920s typically have solid walls, which lack the cavity found in newer properties. As a result, they lose more heat. Solid wall insulation adds a thermal layer to either the inside (Internal Wall Insulation – IWI) or the outside (External Wall Insulation – EWI) of your home, keeping you warmer and saving you money.
A Government-Backed Scheme
The UK Government ECO Scheme is funded by energy suppliers and subject to full regulation by Ofgem.
To find out more about this scheme, please visit the gov.uk website and Ofgem website
Internal vs. External Wall Insulation
Internal Wall Insulation (IWI)
We install insulation boards directly to the inside of external walls or construct a stud wall filled with insulation. This option is perfect if you want to retain the exterior appearance of your property.
External Wall Insulation (EWI)
Insulation boards are fixed to the outside of your home and finished with a protective render or cladding. This method enhances both insulation and curb appeal, while also shielding your home from the elements.
Benefits of Solid Wall Insulation
Internal Wall Insulation (IWI)
- Significant Energy Savings: Lower heating bills by up to 35%.
- Improved Thermal Comfort: Keeps rooms warmer in winter and cooler in summer.
- Increase Property Value: Energy-efficient homes attract buyers.
- Minimal Disruption: Provides freshly finished internal walls.
External Wall Insulation (EWI)
- Significant Energy Savings: Lower heating bills by up to 35%.
- Improved Thermal Comfort: Keeps rooms warmer in winter and cooler in summer.
- Increase Property Value: Energy-efficient homes attract buyers.
- Improved Exterior Finish: Enhances appearance and protects from the elements.
ECO4 & GBIS Grants Available
Solid wall insulation is fully covered under the ECO4 scheme and the Great British Insulation Scheme (GBIS). This means you could have your home insulated for free—saving thousands on installation and hundreds on energy bills every year.
How Do We Do It?
We use high-quality materials and a hassle-free process to insulate your home—whether internally or externally. Every job includes moisture protection via waterproof membranes and a flawless final finish with render or plaster. We always leave your home clean and tidy.
Did You Know?
Solid walls can lose up to 45% of your home's heat—making solid wall insulation one of the most impactful energy-saving upgrades you can make.
Frequently Asked Questions
Solid wall insulation adds an extra thermal layer to the inside or outside of external walls, preventing heat loss and improving comfort. Unlike cavity walls, solid walls are built without a gap, so insulation must be applied either internally or externally to be effective.
Costs vary depending on your property and whether you choose internal or external insulation. For a typical terraced house, internal insulation may cost around £7,500–£9,000. External insulation could cost around £15,000. However, with a grant, it may not cost you anything at all.
It's typically made from foam plastics like polyurethane, polyisocyanurate, or polystyrene. Alternatives include fibreglass and mineral wool. These materials are applied internally or externally based on the method you choose.
You'll get a smooth, freshly plastered finish. Standard fittings such as skirting boards, window boards, and curtain poles will be reinstalled. If you'd like the walls painted, let us know—decorating vouchers may be available through the funding scheme.
Yes! We offer a standard range of colours you can choose from. Your preferences can be discussed during the property survey.