Residential – Private:  Construction of a PassiveHaus – Mosshayne Farm

Residential – Private:  Construction of a PassiveHaus – Mosshayne Farm

The project is the construction of a Passivehaus dwelling at Mosshayne Farm, Westclyst, Exeter.

The dwelling is split into a ground and first floor apartment, with a turret-style mezzanine roof. The build is designed and built to PassiveHaus standard, using renewable energy sources including GSHP and Solar PV. As the build is split into 2 separate apartment, both floors had their own air-tightness envelope. Both apartments passed Passivehaus airtightness criteria of 0.60, achieving air permeability ratings of 0.57m3/(h.m2).

The scheme consisted of the following building technologies:

  • Porotherm clay block construction
  • PCC plank floor construction
  • Triple glazed timber & aluminium windows
  • Zinc roof coverings
  • Ground source heat pumps (GSHP)
  • Mechanical ventilation heat recovery (MVHR)
  • Underfloor heating
  • Solar PV
  • Pro Clima membrane and taping systems
  • Alsecco render finishes

Case Summary

  • Client: Private
  • Architect: Gale & Snowden (EcoDesign)
  • Value: £1.2m
  • Procurement: Single Stage Tender
  • Programme: 52 weeks
  • Completed: November 2019


Small works