Woodlands, Surrey.
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as PDF This is a small two bedroom house with a habitable floor area of 104sq m over two floors. The original intention was to build to the AECB Silver standard but planning requirement limited the size so it was financially possible to consider a higher standard.This project has been designed by the owners to provide a low maintenance ecological house with low running costs. CO2 emissions are minimized by the installation of solar thermal, PV panels, heat recovery ventilation and double stud timber frame wall construction.Low maintenance is achieved by installing alu-clad timber windows, Cedar cladding and self coloured render.
Woodlands, Surrey. : Project images
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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 | - | - | - |
Renewable energy
| Electricity generation | Forecast | Measured |
|---|---|---|
| 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 | |
|---|---|
| Other whole house calculation method | - |
| Energy target | |
| Other energy targets | - |
| Forecast heating load | - |
Airtightness
| Date | Result | |
| Pre-development air permeability test | - | - |
|---|---|---|
| Final air permeability test | - | - |
Project description
| Stage | Under construction |
|---|---|
| Start date | 30 June 2011 |
| Occupation date | 31 January 2012 |
| Location | Chobham Surrey England |
| Build type | New build |
| Building sector | Private Residential |
| Property type | Detached |
| Construction type | Softwood frame |
| Other construction type | Vertical Cedar cladding and self coloured render |
| Party wall construction | |
| Floor area | 104 m² |
| Floor area calculation method | Approximate Floor Area |
| Building certification |
Project Team
| Organisation | N/A |
|---|---|
| Project lead person | Mr D Jupe |
| Landlord or Client | Mr D Jupe & Mrs L Gomez-Jupe |
| Architect | Mr D Jupe |
| Mechanical & electrical consultant | |
| Energy consultant | WARM: Low Energy Building Practice |
| Structural engineer | Fforest Timber Engineering |
| Quantity surveyor | N/A |
| Consultant | |
| Contractor | N/A |
Design strategies
| Planned occupancy | Two adults plus occasional two guests. |
|---|---|
| Space heating strategy | |
| Water heating strategy | Solar thermal panels with immersion heat. |
| Fuel strategy | No gas. |
| Renewable energy strategy | Potential to provide PV panels on rear south facing roof. |
| Passive Solar strategy | Reduced windows on the front (north) elevation and large windows on the rear (south) elevation with sun awnings to reduce solar gain during summer months. |
| Space cooling strategy | Cross ventilation using tilt and turn windows. |
| Daylighting strategy | |
| Ventilation strategy | Mechanical heat recovery unit. |
| Airtightness strategy | To comply with PassivHaus standard. |
| Strategy for minimising thermal bridges | Softwood timber frame construction using a double stud wall of 140mm and 89mm with separating noggins to adjust wall thickness to 'U-value' required. |
| Modelling strategy | PHPP software. |
| Insulation strategy | Warmcell between studs - waiting for full PHPP analysis. |
| Other relevant retrofit strategies | |
| Contextual information |
Building services
| Occupancy | Two adults |
|---|---|
| Space heating | |
| Hot water | |
| Ventilation | PAUL mechanical ventilation heat recovery unit. |
| Controls | |
| Cooking | Electric oven and induction hob. |
| Lighting | |
| Appliances | |
| Renewable energy generation system | 20 x 185Wp Yingli polycrystalline PV modules with 2 x DF100 Riomay evacuated tubes collectors.Fitted on a south facing low pitched (13deg) roof. |
| Strategy for minimising thermal bridges |
Building construction
| Storeys | 2 |
|---|---|
| Volume | - |
| Thermal fabric area | - |
| Roof description | 'I-beams' |
| Roof U-value | - |
| Walls description | Double timber stud wall, total thickness 425mm with Warmcell insulation, 50mm service zone on the inner side and self coloured render (ground floor) or vertical timber cladding (first floor) on 50mm battens. |
| Walls U-value | - |
| Party walls description | N/A |
| Party walls U-value | 0.00 W/m² K |
| Floor description | Insulated ground bearing slab. |
| Floor U-value | - |
| Glazed doors description | Rationel Windows & Doors - Aldus terrace door |
| Glazed doors U-value | 1.01 W/m² K uninstalled |
| Opaque doors description | Rationel Windows & Doors - Aldus front door with side light. |
| Opaque doors U-value | 0.82 W/m² K uninstalled |
| Windows description | Rationel Windows & Doors - Aldus range.To optimize the design 'side guided' windows were chosen if practical with the balance being made up of 'tilt-&-turn', 'top guided' and 'top swing'. |
| Windows U-value | 0.90 W/m² K uninstalled |
| Windows energy transmittance (G-value) | - |
| Windows light transmittance | - |
| Rooflights description | N/A |
| Rooflights light transmittance | - |
| Rooflights U-value | - |