PassivHaus

ST BARNABAS STREET ENERPHIT FULL HOUSE REFURBISHMENT

Contract | £700,000
Role | PassivHaus Designer (as part of SCP)
Client | Grosvenor
Status | Complete

Two small mid-terraced houses underwent a deep retrofit which involved complete remodelling of the interior, rebuilding of the floor, roof and enlarged extension to rear.

The EnerPhit and BREEAM ‘Excellent’ were the set targets for this refurbishment. The resulting house was light, spacious house that achieved an exceptional 95% energy saving due to:

  • insulation was around 20-25% over the requirement set by Building Regulations,
  • airtightness was under 0.6ach@50Pa achieved using an intelligent airtightness membrane and vigorous site training,
  • secondary triple glazing was used behind the existing sash windows on the front and new triple glazed patio doors and rooflight were fitted to rear,
  • PV panels on the roof aim to provide at least 50% of the electrical demand.