The Beattie Passive continuously insulated thermal envelope was used in two ways. Firstly, to construct two separate extensions: a 57m² two-storey structure housing a kitchen/dining room on the ground floor and a master bedroom suite on the first floor, and separately over the garage, a bedroom of 28m² would sit on a steel sub-frame erected through the existing garage. Secondly, the envelope would completely ‘tea cosy’ the entire existing 1970’s three-bedroomed house of 120m².
The original house was built circa 1972 of brick and block construction with a truss roof. The walls had a 75mm cavity with no insulation, the roof was insulated between the ceiling trusses with 100mm mineral wool, and the ground floor was a vented suspended timber without insulation. Thermal imaging, smoke testing and air testing were carried out to provide a benchmark upon which to base improvements in airtightness and thermal performance when the project was completed.
The heating was previously via a gas boiler which fed hot air into a space heating system and hot water via a cylinder. Estimated CO² emissions from the house were previously 3,863 kg per annum.
Click on the links below to view the following documents:
Meet the owners and listen to them talking about the benefits of Passivhaus living.
» Read our Project Blog