Victorian Terraced House — Boiler Replacement & Insulation, Sheffield

Property

Victorian mid-terrace, solid walls

Sector

Homeowner

Location

Sheffield

Services

High-efficiency condensing boiler · Internal wall insulation (2 rooms) · Loft insulation

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

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

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.

• Annual saving

  £680

• EPC improvement

  F → D

• CO₂ reduction

  2.1t / yr