As we reported back in February, we have started constructing our first Passivhaus at Hawksworth. Passivhaus is an advanced energy performance and thermal comfort standard which originates from Germany, requiring superior levels of insulation and air-tightness, far above current UK Building Regulation standards. The Architect is Halliday Clark in Shipley, PQS is the Michael Eyres Partnership and the contract is in excess of £1m.
So, after a long, wet winter we are now progressing well in the Spring sunshine. Whilst Passivhaus buildings can be erected from varying construction techniques, Hawkwind consists of a Structural Insulated Panel inner frame (SIPS), largely clad on the outside in local, random stone, giving the house a typical external appearance. Inside is where things really start to differ, with a further 250mm of unbroken insulation lining the SIPS panels prior to timber studs which provide a zone for services, prior to the typical plasterboard inner surface. A taped, internal membrane ensures excellent air-tightness, whilst thermal breaks wherever structural members breach the building’s envelope minimise cold-bridging and heat loss. Triple-glazed windows and doors are also part of the Passivhaus criteria, as is a Mechanical Ventilation with Heat Recovery system which provides a comfortable internal environment together with extraction of moisture and odours from kitchens and bathrooms.
Whilst we have used the SIPS system before, and worked on increasingly airtight buildings, this is our first Passivhaus construction. We will check the building’s airtightness as we progress and must achieve an airtightness level of 0.6 air changes per hour at completion, which is far in excess of the 10 air changes per hour, UK Building Regulation requirement !
The house also includes a part basement garaging and entrance area, internal oak frame and various Smart Home features to control TV, music and lighting and even has its own cinema room !
We will keep you informed of our progress as we look to complete early in Autumn !
Tel:01756 793 734
Fax:01756 701 621
Company Reg No:1001294
Sidings Business Park, Skipton
North Yorkshire, BD23 1TB