Church Lane
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as PDF A private residential new build to AECB building Standard in masonry cavity wall construction.
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Energy and fuel use
Measured data from renewable generation is not yet available.
Fuel use
| Pre-development | Forecast | Measured | |
| Electricity use | - | 1064.9758 kWh/yr | - |
|---|---|---|---|
| Natural gas use | - | 11627.968 kWh/yr | - |
| Oil use | - | - | - |
| LPG use | - | - | - |
| Wood use | - | 945.84 kWh/yr | - |
| Other Fuel | - | - | - |
| Pre-development | Forecast | Measured | |
| Primary energy requirement | - | 100 kWh/m².yr | - |
|---|---|---|---|
| Annual CO₂ emissions | - | 18 kg CO₂/m².yr | - |
| Annual space heat demand | - | 30 kWh/m².yr | - |
Renewable energy
| Electricity generation | Forecast | Measured |
|---|---|---|
| Renewables Technology | - | - |
| Other Renewables Tech | - | - |
| Electricity consumed by generation | - | - |
| Primary energy requirement offset by renewable generation | 100 kWh/m².yr | - |
| Annual CO₂ emissions offset by renewable generation | 18 kg CO₂/m².yr | - |
Calculation and targets
| Whole house energy calculation method | PHPP |
|---|---|
| Other whole house calculation method | - |
| Energy target | AECB Silver |
| Other energy targets | - |
| Forecast heating load | 16 W/m² demand |
Airtightness
| Date | Result | |
| Pre-development air permeability test | - | - |
|---|---|---|
| Final air permeability test | 31 August 2018 | 0.94m³/m².hr @ 50 Pascals |
Project description
| Stage | Occupied |
|---|---|
| Start date | 14 November 2017 |
| Occupation date | 30 September 2018 |
| Location | Leeds West Yorkshire England |
| Build type | New build |
| Building sector | Private Residential |
| Property type | Detached |
| Construction type | Masonry Cavity |
| Other construction type | 383mm block work cavity wall, 150mm cavity with 120mm Kingspan |
| Party wall construction | |
| Floor area | 170 m² |
| Floor area calculation method | Treated Floor Area (PHPP) |
| Building certification |  AECB silver standard certified building |
Project Team
| Organisation | Leeds Environmental Design Associates |
|---|---|
| Project lead person | Leeds Environmental Design Associates |
| Landlord or Client | Private Client |
| Architect | Leeds Environmental Design Associates |
| Mechanical & electrical consultant | Leeds Environmental Design Associates |
| Energy consultant | Leeds Environmental Design Associates |
| Structural engineer | Melia, Smith & Jones |
| Quantity surveyor | |
| Consultant | Green Building Store |
| Contractor | Ashfield Building Group |
Design strategies
| Planned occupancy | Three People, working during week days. |
|---|---|
| Space heating strategy | Heating from mains gas fired systems boiler feeding radiators and underfloor on ground level; wood burning stove; MVHR. |
| Water heating strategy | Water heated by systems boiler stored in cylinder with backup electric immersion heater. |
| Fuel strategy | Mains gas, mains electricity. |
| Renewable energy strategy | N/A |
| Passive Solar strategy | Home situated to benefit from southern solar gains with optimised window proportions using PHPP and orientated to maximises solar benefit. |
| Space cooling strategy | Natural ventilation for most of the cooling season. Daytime use of MVHR with night purging during heat waves. Cross ventilation possible. |
| Daylighting strategy | All rooms to achieve daylight factor of 1.5% with kitchen living space up to 2% |
| Ventilation strategy | Comfort ventilation with heat recovery (winter); Openable windows (summer). |
| Airtightness strategy | All junctions between walls, ceilings and floors sealed by wet plaster and tape with sealant; Tapes used used round perimeter abutments, windows and openings using plywood linings to enable two taped joints; all services penetrations and joints to be made air tight with airtight ness tape and sealant. First floor carried on bearer bolted to wall with parge coat behind to continue airtight plaster layer. FF ceiling sealed by using tape and plaster skim combination with continuity over top of studs and at edge abutments using tape. |
| Strategy for minimising thermal bridges | Careful detailing and use of thermal transmittance breaks work to reduce thermal bridges. Refer to detail drawings of key junctions for roof walls and floors and perimeter of openings. |
| Modelling strategy | Whole house modelling was undertaken in PHPP. |
| Insulation strategy | Continuous insulation layer with all joins and junctions filled and taped; cavity wall insulation of 120mm phenolic foam insulation; floor insulation of 150 mm PIR with all joints taped and sealed including to masonry at perimeters. Bobtail truss use to maximise insulation to 400mm of mineral wool. |
| Other relevant retrofit strategies | |
| Contextual information | Clients remained living onsite in old property during the construction with demolition of house and garage taken place in a phased approach. |
Building services
| Occupancy | Three adults, working during the week |
|---|---|
| Space heating | Heating provided by Ideal Logic 24 system A rated boiler with radiators and Dik Geurts Ivar 5 High A+ rated wood burner. Zehnder ComfoAir Q350 MVHR system to reclaim heat from exhaust ventilation air. |
| Hot water | Ideal Logic 24 system A rated boiler feeding an indirect Gledhill Unvented 210 slimline cylinder. |
| Ventilation | Zehnder ComfoAir Q350 PHI certified MVHR system with efficiency of up to 96%, to serve 5 wet rooms and one kitchen. |
| Controls | Zone control for UF heating and thermostat, MVHR with variable settings. |
| Cooking | Gas hob and electric fan oven |
| Lighting | 100% low energy lighting throughout building |
| Appliances | A+ rated fridge freezer, condensing drier and washing machine |
| Renewable energy generation system | |
| Strategy for minimising thermal bridges | Careful detailing to aim for thermal bridge free design. Key junctions and penetrations noted and addressed in detailing, with advice from structural engineers. |
Building construction
| Storeys | 2 |
|---|---|
| Volume | 596.9m³ |
| Thermal fabric area | 56059 m² |
| Roof description | Roof trusses as bobtail design to fit 400mm mineral wool insulation mineral wool insulation. Colourcoat urban standing seam roof Klober Permo; light breathable membrane on 18mm OSB-3 boards with joints taped. |
| Roof U-value | 0.11 W/m² K |
| Walls description | Block work cavity wall with 150mm partial fill cavity. external block work (thermal conductivity of 0.42w/mk) to be rendered or clad, with 30mm air cavity, 120mm of Kingspan k108 Kooltherm cavity insulation, with med weight inner leaf concrete block, plasterboard with all joints taped and skim plaster. |
| Walls U-value | 0.13 W/m² K |
| Party walls description | N/A |
| Party walls U-value | 0.00 W/m² K |
| Floor description | 75mm screed on separating layer, on 140mm Kingspan Kooltherm, on 1200g dpm, on suspended beam and block floor with 150mm void below. |
| Floor U-value | 0.12 W/m² K |
| Glazed doors description | All doors and windows supplied by the Green Building Store as per their Performance range |
| Glazed doors U-value | 1.00 W/m² K installed |
| Opaque doors description | All doors and windows supplied by the Green Building Store as per their Performance range |
| Opaque doors U-value | 1.00 W/m² K installed |
| Windows description | All doors and windows supplied by the Green Building Store as per their Performance range |
| Windows U-value | 1.06 W/m² K installed |
| Windows energy transmittance (G-value) | 0.53 % |
| Windows light transmittance | 0.52% |
| Rooflights description | Velux GGL MK08 triple glazed unit |
| Rooflights light transmittance | 0.5% |
| Rooflights U-value | 1.30 W/m² K |