BER Before: E1 – After: A3

Before: BER E1 

After: BER A3 

The challenge: Bungalow built in 1977, 70mm cavity filled with wool, 200mm attic insulation and double-glazed windows and doors.  Heating is via a regular oil boiler with an open fire in the living room.  House is cold and draughty. 

Client Requirements: To increase footprint by adding rear extension, make the house warm and comfortable by reducing the heat loss and improving the heat efficiency within the specified budget.

Works Included:

  • Specification, Grant Coordination and Works Completion
  • New 40m2 rear extension.
  • Passive uPVC triple glazed windows and doors.
  • Internal wall insulation.
  • Attic insulation upgrade.
  • Air to Water Heat Pump with time and temperature control.
  • Rads upsized to match heat loss
  • Pressurised water system.
  • 200 litre factory insulated hot water cylinder.
  • Chimney and open fire removed.
  • Air tightness improved to < 5 m3/(h*m2 surface area)

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