Prestwich Carbon Coop Retrofit
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as PDF A whole house retrofit carried out by Carbon Coop in 2014. Includes EWI, cavity wall insulation, some triple glazinng (double glazing retained where in good condition), passive / MEV hybrid vent, underfloor insulation and solar PV
Prestwich Carbon Coop Retrofit : 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 | 2500 kWh/yr | 2000 kWh/yr | 1546 kWh/yr |
|---|---|---|---|
| Natural gas use | 16000 kWh/yr | 8618 kWh/yr | 8800 kWh/yr |
| Oil use | - | - | - |
| LPG use | - | - | - |
| Wood use | - | - | - |
| Other Fuel | - | - | - |
| Pre-development | Forecast | Measured | |
| Primary energy requirement | 214 kWh/m².yr | 130 kWh/m².yr | 122 kWh/m².yr |
|---|---|---|---|
| Annual CO₂ emissions | 42 kg CO₂/m².yr | 26 kg CO₂/m².yr | 24 kg CO₂/m².yr |
| Annual space heat demand | 15000 kWh/m².yr | - | - |
Renewable energy
| Electricity generation | Forecast | Measured |
|---|---|---|
| Solar PV | 2300 kWh/yr | 2500 kWh/yr |
| Other Renewables Tech | - | - |
| Electricity consumed by generation | - | - |
| Primary energy requirement offset by renewable generation | 80 kWh/m².yr | 68 kWh/m².yr |
| Annual CO₂ emissions offset by renewable generation | 14 kg CO₂/m².yr | 11 kg CO₂/m².yr |
Calculation and targets
| Whole house energy calculation method | SAP |
|---|---|
| Other whole house calculation method | - |
| Energy target | Retrofit for the Future |
| Other energy targets | - |
| Forecast heating load | - |
Airtightness
| Date | Result | |
| Pre-development air permeability test | - | 9.7m³/m².hr @ 50 Pascals |
|---|---|---|
| Final air permeability test | - | 9.2m³/m².hr @ 50 Pascals |
Project description
| Stage | Occupied |
|---|---|
| Start date | 31 October 2014 |
| Occupation date | |
| Location | Prestwich, Manchester Lancashire England |
| Build type | Refurbishment |
| Building sector | Private Residential |
| Property type | Semi-Detached |
| Construction type | Solid Brick |
| Other construction type | Approx 65mm cavity at front other walls classed as hard to treat |
| Party wall construction | |
| Floor area | 115 m² |
| Floor area calculation method | Actual Floor Area (SAP) |
| Building certification |
Project Team
| Organisation | Carbon Coop |
|---|---|
| Project lead person | |
| Landlord or Client | Dominic McCann |
| Architect | Marianne Heaslip |
| Mechanical & electrical consultant | |
| Energy consultant | |
| Structural engineer | |
| Quantity surveyor | |
| Consultant | |
| Contractor |
Design strategies
| Planned occupancy | 2 adults, 1 child |
|---|---|
| Space heating strategy | Worcester Bosch combi boiler retained as part of retrofit, existing radiators also retained. |
| Water heating strategy | Worcester Bosch combi boiler retained as part of retrofit |
| Fuel strategy | |
| Renewable energy strategy | Solar PV |
| Passive Solar strategy | |
| Space cooling strategy | |
| Daylighting strategy | |
| Ventilation strategy | Aereco wall inlet vents and MEV |
| Airtightness strategy | |
| Strategy for minimising thermal bridges | |
| Modelling strategy | SAP / My Home Energy Planner |
| Insulation strategy | EWI, cavity walls insulation, under-floor insulation for suspended timber floor. |
| Other relevant retrofit strategies | |
| Contextual information | Existing house was built in 1922 |
Building services
| Occupancy | 2 adults, 1 child |
|---|---|
| Space heating | Worcester Bosch combi boiler |
| Hot water | Worcester Bosch combi boiler |
| Ventilation | Aereco inlet vents and MEV |
| Controls | |
| Cooking | |
| Lighting | |
| Appliances | |
| Renewable energy generation system | |
| Strategy for minimising thermal bridges |
Building construction
| Storeys | 2 |
|---|---|
| Volume | 290m³ |
| Thermal fabric area | - |
| Roof description | Slate roof with loft room. Pitched roof insulated with 25mm XPS + 75mm hemp fibre insulation. |
| Roof U-value | - |
| Walls description | |
| Walls U-value | - |
| Party walls description | |
| Party walls U-value | - |
| Floor description | |
| Floor U-value | - |
| Glazed doors description | |
| Glazed doors U-value | - - |
| Opaque doors description | |
| Opaque doors U-value | - - |
| Windows description | |
| Windows U-value | - - |
| Windows energy transmittance (G-value) | - |
| Windows light transmittance | - |
| Rooflights description | |
| Rooflights light transmittance | - |
| Rooflights U-value | - |