Cre8 Barn

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WINNER of the UK Passivhaus Awards 2015 - The Cre8 Barn project is an innovative barn conversion to EnerPHit standard, which has transformed a derelict cow byre into an education centre for Yorkshire Wildlife Trusts Stirley Community Farm. The project features a box within a box structure (inner timber frame building within outer masonry barn) which preserves the outer appearance of the barn, while offering high levels of airtightness and continuity of insulation. The timber frame construction not only ensures thermal performance, but also helps provide structural stability to the outer masonry walls.
Images Graphs Figures Description Strategies Building

Cre8 Barn : Project images

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CO2 emissionsPrimary energy requirement
Energy target

Energy and fuel use

Fuel use by type
Primary energy requirement
CO2 emissions

Measured data from renewable generation is not yet available.

Fuel use

Electricity use - - -
Natural gas use- - -
Oil use- - -
LPG use- - -
Wood use- - -
Other Fuel - - -
Primary energy requirement - - -
Annual CO₂ emissions - - -
Annual space heat demand - 33 kWh/m².yr -

Renewable energy

Electricity generationForecastMeasured
Renewables Technology--
Other Renewables Tech--
Electricity consumed by generation --
Primary energy requirement
offset by renewable generation
Annual CO₂ emissions
offset by renewable generation

Calculation and targets

Whole house energy calculation method PHPP
Other whole house calculation method-
Energy target EnerPHit
Other energy targets-
Forecast heating load 17 W/m² demand


Pre-development air permeability test--
Final air permeability test-0.35m³/m².hr @ 50 Pascals

Project description

Start date01 September 2012
Occupation date01 September 2013
Location Huddersfield West Yorkshire  England
Build typeRefurbishment
Building sectorPublic
Property typeDetached
Construction typeOther
Other construction typeBox within a box timber frame within masonry
Party wall construction
Floor area 98
Floor area calculation method Treated Floor Area (PHPP)
Building certification  Passivhaus certified building Passivhaus certified building

Project Team

OrganisationGreen Building Store Design & Build
Project lead person
Landlord or ClientYorkshire Wildlife Trust
ArchitectDerrie OSullivan & Sue Heywood
Mechanical & electrical consultant Green Building Company
Energy consultantGreen Building Company
Structural engineerStuart McCormick, SGM Structural Engineers
Quantity surveyor
ConsultantCertifier - WARM: Low Energy Building Practice

Design strategies

Planned occupancy
Space heating strategy
Water heating strategy
Fuel strategy
Renewable energy strategy
Passive Solar strategy
Space cooling strategy
Daylighting strategy
Ventilation strategy
Airtightness strategy
Strategy for minimising thermal bridges
Modelling strategy
Insulation strategy
Other relevant retrofit strategies
Contextual information

Building services

Space heating
Hot water
Renewable energy generation system
Strategy for minimising thermal bridges

Building construction

Storeys 1
Volume -
Thermal fabric area -
Roof description Timber I beam with Gutex fibreboard and Earthwool Loft roll
Roof U-value 0.10 W/m² K
Walls description Timber I beam with Gutex fibreboard and Earthwool Frame therm
Walls U-value 0.13 W/m² K
Party walls description
Party walls U-value -
Floor description RC Slab with PIR insulation
Floor U-value 0.11 W/m² K
Glazed doors description Timber aluminium composite with thermal break
Glazed doors U-value 0.78 W/m² K installed
Opaque doors description
Opaque doors U-value - -
Windows description Timber aluminium composite with thermal break
Windows U-value 0.78 W/m² K -
Windows energy transmittance (G-value) 49 %
Windows light transmittance -
Rooflights description
Rooflights light transmittance -
Rooflights U-value -