Barmouth Road


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General Information:
  • Project name: Barmouth Road
  • Project type: refurbishment
  • Building type: Victorian terraced house
  • Building Typology: residential
  • Location: United Kingdom, England, London
  • Year of construction: 2013
  • Number of buildings: 1
  • Number of floors: 2


Building Size:
  • Treated floor area: 139 m2


Building Envelope:
  • Exterior wall: – 230mm existing solid brick wall; 30mm ventilated cavity; 100mm phenolic insulation; 15mm OSB with airtightness tape; 12,5mm plasterboard; U=0.173 W/(m2K)
  • Roof: 80mm phenolic insulation (between rafters); 50mm phenolic insulation (under rafters); 15mm OSB with airtightness tape; 12,5mm plasterboard; U-value=0,14 W/(m2K)
  • Basement floor: 65mm concrete screed; 30mm PIR insulation; 100mm phenolic insulation; 150mm concrete slab; U-value=0,112 W/(m2K)
  • Window: triple glazing; U=0.58 W/(m2K)


Building service systems:
  • Ventilation: mechanical ventilation with heat recovery (MVHR).
  • Heating: Condensing gas boiler with 300 l DHW cylinder. Under floor heating on lower floor and radiators on upper floor. Heat recovery from MVHR unit.


Building energy performance:
  • Annual heating demand:  23 kWh/m2a
  • Heating load: 14 W/m2
  • Primary energy requirement: 114 kWh /m2a
  • Air tightness: n50 = 0.87/h
  • CO2 emissions: yearly production of 20 kg CO2/m2
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