Freebridge Community Housing gains a pair of Passivhaus homes

PHT member Parsons + Whittley add to their ever expanding Passivhaus portfolio with the certification of 2 semi-detached homes for Freebridge Community Housing.

The two new semi- detached, 3-bedroomed Passivhaus dwellings received certification in July 2015. They replace No. 6 Clapper Lane, whilst sharing and improving the existing access and parking arrangement to the four adjacent flats which are also within the control of Freebridge Community Housing. As well as meeting Passivhaus Standard, the affordable development aims for Code for Sustainable Homes level 3.

 

The appearance of the new homes is of traditionally-constructed brick-built houses with entrance canopies which provide a welcoming presence to the side entrance doors from the roadside. Both proposed dwellings have side entrances in order to maximise the potential for glazing to face the road (south-east) and to minimise overlooking of neighbouring properties.

Construction

Wall	103mm brick (or blockwork for render) 50mm vent cavity 25mm battens 100mm NBT Pavatherm Plus T&G insulation board 200mm Timber studwork frame fully filled with NBT Pavaflex insulation 12mm OSB 50mm Service void. Fully filled with NBT Pavaflex insulation 15mm Plasterboard
Roof	Concrete roof tiles 50x25mm timber batten VP underlay timber trussed rafter roof construction infilled with 500mm mineral wool insulation 18mm OSB to u/s truss chord service void for first floor MVHR ducting
Floor	Type 1 fill 50mm fine aggregate sand blinding 400mm Dow Floormate insulation 50mm fine aggregate sand blinding 300mm RC slab

Performance

Airtightness (≤0.6ach@50pascals)	0.6
Thermal Energy demand (≤15kWh/m2.yr)	16
Thermal Energy load (≤10W/m2)10	10
Primary Energy demand (≤120kWh/m2.yr)	107
Form Factor (ext. area/TFA)	3.38

 

Key Team

Client: Freebridge Community Housing  Architect: Parsons + Whittley Ltd.  M&E Consultant: Alan Clarke  Contractor: E.N. Suiter & Sons Ltd.  Structural Engineer: Rossi Long Consulting  Developer: Orwell Housing Association Certifier: MEAD: Energy & Architectural Design Ltd.

9th September 2015

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