Internal Wall Insulation Retrofit UK
Grant-funded internal wall insulation retrofit across the UK.
Internal Wall Insulation Retrofit UK
Cold rooms and punishing energy bills? Energy Saver UK helps homeowners secure ECO4 & Warm Homes Fund grants that can cover up to 100 % of your internal wall insulation retrofit. One quick survey, zero hassle, warmer home in days. Get Your Free Retrofit Survey
Why Choose Energy Saver UK?
Up to 100 % funded
Through ECO4 & Warm Homes Fund—keep your savings for the fun stuff.
Cut heat loss by as much as 45 %
In solid-wall homes, locking in warmth all winter.
Save £140–£700 per year
On energy bills, paying back the install in as little as two winters.<
Boost EPC rating
Average jump: two bands, increasing property value and mortgage appeal.
Includes PAS 2035 moisture controls
To stop condensation and mould before they start.
Our Three-Step Retrofit Process
1 · Free Retrofit Survey
Thermal-imaging and ventilation checks identify exactly where your walls are leaking heat.
2 · Swift, Clean Installation
DBS-checked crews fit insulated plasterboard or stud-wall mineral wool in as little as 48 hours per room. All work meets PAS 2030–2035 standards and is backed by a 25-year SWIGA guarantee.
3 · Grant & After-Care
Our FCA-authorised advisers complete the ECO4 or Warm Homes Fund paperwork for you, then update your EPC and check-in after 12 months to track energy-use reduction.
Why Homeowners Pick Energy Saver UK
- Bolton-based, UK-wide reach with next-day survey slots.
- TrustMark & PAS accredited retrofit installer—no subcontractors.
- 98 % customer-satisfaction score from 1,700+ installs since 2014.
- Finance fallback—0 % for 12 months if you fall outside grant criteria.
- Data-driven results: average client sees a 32 % drop in gas use within the first year.
Internal Wall Insulation FAQs
Am I eligible for ECO4?
You’ll usually qualify if your home has an EPC rating of D-G and someone in the household receives qualifying benefits or is classed as fuel-poor by your local council.