Detached two-storey Passivhaus (Kendal, Cumbria)

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Detached two-storey Passivhaus (Kendal, Cumbria)2017-01-06T20:35:18+00:00

Project Description

This Passivhaus in Kendal, Cumbria had the second best result for airtightness ever recorded in the UK at the time.

  • 1st certified Passivhaus in Kendal - by Eden Insulation
  • Kendal Passivhaus ground floor by Eden Insulation
  • Kendal Passivhaus frame erected by Eden Insulation
  • Kendal Passivhaus first floor by Eden Insulation

Our clients for this new-build Passivhaus in the Kentrigg area of Kendal were self-builders committed to constructing a home with the lowest possible energy use.

We constructed the frame using timber panels with Spano Durelis Vapour Block board on the inside for airtightness, fully filled with cellulose insulation.

The property has a trussed roof with an airtight ceiling and 600mm depth of cellulose fibre insulation.

It comfortably met the Passivhaus standard and is the first certified Passivhaus in Kendal. In fact, the airtightness testing engineer told us it was the best reading he’d personally recorded in his 28 years’ experience.

Watch our video about the build below.


  • Achieved Passivhaus standard
  • High degree of insulation & airtightness

Tech spec

  • 0.11 air changes per hour (Passivhaus target: 0.65)
  • 300mm I-beam wall with filled with cellulose insulation
  • Internal Spano Durelis Vapour Block board with 50mm insulated service batten space
  • Trussed roof with airtight ceiling and 600mm cellulose fibre insulation