Crossway
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as PDF The Crossway Passivhaus is a breathtaking, ambitious and pioneering sustainable family home set within rural Kent countryside. Nestled beneath a soaring 9m high, 20m wide yet only 120mm think terracotta arch crafted from clay dug and handmade within 4 miles of the site is a highly insulated timber frame orientated to maximise passive solar gain and daylighting. Externally the building is complimented by a palette of local clay and timber. These natural materials instil this iconic structure with a strong sense of place. The arched roof supports a native wild-flower meadow roof in 300mm of clay subsoil excavated from the foundations. The interior incorporates an array of natural products and finishes.Crossway is a living, breathing research project which is continuing to help test and develop new sustainable techniques and technologies. Its also a healthy and inspiring family home!
Crossway : Project images
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Energy and fuel use
Renewable electricity generation This project has used the contributions from renewable electricity generation equipment to either meet the Retrofit for the Future target or otherwise reduce the Primary energy requirement and CO₂ emissions associated with the project.
Measured data from renewable generation is not yet available.
Fuel use
| Pre-development | Forecast | Measured | |
| Electricity use | - | - | - |
|---|---|---|---|
| Natural gas use | - | - | - |
| Oil use | - | - | - |
| LPG use | - | - | - |
| Wood use | - | - | - |
| Other Fuel | - | - | - |
| Pre-development | Forecast | Measured | |
| Primary energy requirement | - | - | - |
|---|---|---|---|
| Annual CO₂ emissions | - | - | - |
| Annual space heat demand | - | - | 14.82 kWh/m².yr |
Renewable energy
| Electricity generation | Forecast | Measured |
|---|---|---|
| Renewable electricity | - | 5500 kWh/yr |
| Other Renewables Tech | - | - |
| Electricity consumed by generation | - | - |
| Primary energy requirement offset by renewable generation | - | -54 kWh/m².yr |
| Annual CO₂ emissions offset by renewable generation | - | -13 kg CO₂/m².yr |
Calculation and targets
| Whole house energy calculation method | |
|---|---|
| Other whole house calculation method | - |
| Energy target | PassivHaus |
| Other energy targets | - |
| Forecast heating load | - |
Airtightness
| Date | Result | |
| Pre-development air permeability test | - | - |
|---|---|---|
| Final air permeability test | - | 0.72m³/m².hr @ 50 Pascals |
Project description
| Stage | Occupied |
|---|---|
| Start date | |
| Occupation date | 01 February 2009 |
| Location | Staplehurst Kent England |
| Build type | New build |
| Building sector | Private Residential |
| Property type | Detached |
| Construction type | Other |
| Other construction type | Timbrel vaulted arch & timber frame |
| Party wall construction | |
| Floor area | 255 m² |
| Floor area calculation method | Treated Floor Area (PHPP) |
| Building certification |  Passivhaus certified building |
Project Team
| Organisation | Hawkes Architecture |
|---|---|
| Project lead person | Richard Hawkes |
| Landlord or Client | Mr & Mrs Hawkes |
| Architect | Richard Hawkes |
| Mechanical & electrical consultant | Scott Wilson & Cambridge University |
| Energy consultant | Anthony Morgan Newform Energy |
| Structural engineer | |
| Quantity surveyor | |
| Consultant | |
| Contractor | Ecolibrium Solutions |
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
| Occupancy | |
|---|---|
| Space heating | |
| Hot water | |
| Ventilation | |
| Controls | |
| Cooking | |
| Lighting | |
| Appliances | |
| Renewable energy generation system | |
| Strategy for minimising thermal bridges |
Building construction
| Storeys | |
|---|---|
| Volume | - |
| Thermal fabric area | - |
| Roof description | |
| Roof U-value | 0.12 W/m² K |
| Walls description | |
| Walls U-value | 0.12 W/m² K |
| Party walls description | |
| Party walls U-value | - |
| Floor description | |
| Floor U-value | 0.11 W/m² K |
| Glazed doors description | |
| Glazed doors U-value | 0.70 W/m² K installed |
| Opaque doors description | |
| Opaque doors U-value | - - |
| Windows description | |
| Windows U-value | 0.70 W/m² K - |
| Windows energy transmittance (G-value) | - |
| Windows light transmittance | - |
| Rooflights description | |
| Rooflights light transmittance | - |
| Rooflights U-value | - |