Case study
Victorian Terraced House:Boiler Replacement & Insulation, Sheffield
Victorian mid-terrace, solid walls in Sheffield
- Property
- Victorian mid-terrace, solid walls
- Sector
- Homeowner
- Location
- Sheffield
The brief
The challenge
A 1900s solid-wall mid-terrace with draughts, cold rooms, and an ageing gas boiler. Solid walls are among the most challenging retrofit scenarios in the UK. Internal insulation has trade-offs, and the homeowner needed honest advice on what was and wasn't worth doing.
Our approach
How we did it.
We assessed the fabric first and identified two rooms with the worst cold-wall effect. We proposed internal wall insulation for those specific rooms rather than the whole house, reducing disruption and cost while targeting the biggest comfort gain. A new high-efficiency condensing boiler and loft insulation completed the package.
The results
What changed.
EPC improved from F (28) to D (62). Annual saving of £680. The two insulated rooms went from being barely usable in winter to comfortable throughout the year. Customer opted to leave the rest of the house uninsulated for now, with a clear plan for the next phase.
£680
Annual saving
F → D
EPC improvement
2.1t / yr
CO₂ reduction
They were honest that a Victorian terrace with solid walls is never going to be easy to insulate. They explained the trade-offs, we chose internal insulation for the two coldest rooms, and the difference has been remarkable. Rooms we barely used are now comfortable.
More evidence
Related case studies
Social Housing
Council Housing Programme: 60 Properties, West Midlands
Mixed: 1960s council flats and terraces
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