The Library House, 211 Northwold Road, London E5 8RA
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as PDF New 2 bedroom urban infill dwelling set between a Victorian terrace house and Clapton public library, set on 2 floors with 2 flat roofs covered with sedum.
The Library House, 211 Northwold Road, London E5 8RA : Project images
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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 | - | 1961 kWh/yr | - |
|---|---|---|---|
| Natural gas use | - | - | - |
| Oil use | - | - | - |
| LPG use | - | - | - |
| Wood use | - | - | - |
| Other Fuel | - | - | - |
| Pre-development | Forecast | Measured | |
| Primary energy requirement | - | 68 kWh/m².yr | - |
|---|---|---|---|
| Annual CO₂ emissions | - | 16 kg CO₂/m².yr | - |
| Annual space heat demand | - | 29 kWh/m².yr | 17 kWh/m².yr |
Renewable energy
| Electricity generation | Forecast | Measured |
|---|---|---|
| PV panels | 2059 kWh/yr | - |
| Other Renewables Tech | - | - |
| Electricity consumed by generation | - | - |
| Primary energy requirement offset by renewable generation | -3 kWh/m².yr | - |
| Annual CO₂ emissions offset by renewable generation | -1 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 | 15.7 W/m² demand |
Airtightness
| Date | Result | |
| Pre-development air permeability test | - | - |
|---|---|---|
| Final air permeability test | 22 May 2020 | 0.98m³/m².hr @ 50 Pascals |
Project description
| Stage | Under construction |
|---|---|
| Start date | 01 July 2019 |
| Occupation date | |
| Location | East London London England |
| Build type | New build |
| Building sector | Private Residential |
| Property type | Mid Terrace |
| Construction type | Softwood frame |
| Other construction type | External brick leaf |
| Party wall construction | Solid masonry - 215mm on west side and min 450mm thick on east |
| Floor area | 72 m² |
| Floor area calculation method | Treated Floor Area (PHPP) |
| Building certification |  AECB silver standard certified building |
Project Team
| Organisation | Macdonald Wright Architects |
|---|---|
| Project lead person | James Macdonald Wright |
| Landlord or Client | Tamjam Ltd |
| Architect | McDonald Wright Architects |
| Mechanical & electrical consultant | Green Building Store |
| Energy consultant | Conker Conservation Ltd (Passivhaus consultant), Helen Renny (Energy assessor) |
| Structural engineer | Osbourne Edwards |
| Quantity surveyor | Christopher Gosney |
| Consultant | Butler & Young (Building Control Inspector), BLP Insurance (Warranty provider) |
| Contractor | DanEco Build Ltd |
Design strategies
| Planned occupancy | To be rented to a couple or small family max 4 persons. |
|---|---|
| Space heating strategy | High efficiency wood burning stove plus wet UFH fed by electric boiler. Amptec U901. |
| Water heating strategy | Megaflow Solar PV ready 210 litres |
| Fuel strategy | Mains electricity |
| Renewable energy strategy | Solar thermal panels, evacuated tubes, on roof feeding solar cylinder. |
| Passive Solar strategy | Limited access to solar, 2 no. front windows face south. |
| Space cooling strategy | Stack and cross ventilation. Large opening rooflights over stairwell. Thermal mass in floor and clay blocks to plinth walls. |
| Daylighting strategy | Well sized front, rear and side windows, plus 3 no. rooflights. |
| Ventilation strategy | MVHR system using Paul Focus 200 and rigid ductwork, frost coil. |
| Airtightness strategy | Membranes to walls and ceilings, tapes bonding membranes and windows. Detailed drawings and specification. Blower proof airtight paint to be used on complex junctions between roof, timber frame, and around steel frame. |
| Strategy for minimising thermal bridges | Steel frame carefully isolated with insulation on exterior and interior. Foamglas and Compacfoam thermal breaks used. |
| Modelling strategy | PHPP |
| Insulation strategy | Flood resilient plinths insulated with mineral wool cavity batts and XPS. Main walls constructed with Larsen truss timber frame fully filled with mineral wool insulation in 3 layers. |
| Other relevant retrofit strategies | N/A |
| Contextual information | Steel frame had to be erected to support both party walls and needed to be erected well in advance of main building design for party wall reasons. This has created a highly complex set of details working around the frame in terms of airtightness and thermal bridging. Site is also in flood risk area so plinth had to be of flood resilient design. |
Building services
| Occupancy | To be rented to a couple or small family max 4 persons. |
|---|---|
| Space heating | Wet UFH fed by electric boiler. AMptec U1201, allowing a low temperature circuit. |
| Hot water | Megaflo Eco Solar Direct unvented cylinder 210 litre |
| Ventilation | MVHR system using Paul Focus 200 and rigid ductwork, frost coil. Complex layout owing to steel frame being erected very early in construction process |
| Controls | UFH has 3 zones. |
| Cooking | Induction hob Neff T36FB41X0G Induction HobNeff B17CR32N1B CircoTherm Single Electric Oven |
| Lighting | Warm white LED used throughout |
| Appliances | FF:Neff KI6873F30G Integrated Fridge Freezer, A++ Energy Rating, 56cm Wide A++ 225 kWh/annumD/W:Neff S513K60X1G Integrated Dishwasher, Black, A++ energy rating, 59.8 cm wide, 262 kWh/annumHood:Neff N 30 Integrated cooker hood 60 cm silver D64MAC1X0B, B Energy Rating, 60cm wide with fold out unit |
| Renewable energy generation system | 8 no 270Wp PV panels, 2 no 320wp panels Perliight Mono Delta Black, solar Edge inverter, Solar I-Boost controller to optimise generation of hot water. |
| Strategy for minimising thermal bridges | Membranes to walls and ceilings, tapes bonding membranes and windows. Detailed drawings and specification. Blower proof airtight paint to be used on complex junctions between roof, timber frame, and around steel frame |
Building construction
| Storeys | 2 |
|---|---|
| Volume | 194m³ |
| Thermal fabric area | 20177 m² |
| Roof description | Softwood solid joists with 60mm Steico Therm and plasterboard between pushed up to underside of 18mm WBP ply decking; tapered PIR insulation system by Bauder average 120mm thick; bitumen built up roofing; 50mm sedum roof covering |
| Roof U-value | 0.15 W/m² K |
| Walls description | Main structure is Larsen truss from 90 x 45mm timber to overall width of 325mm insulated with 0.032 mineral wool batts; sheathed internally with 13mm OSB; plasterboard over a batten void; external sheathing ply, cavity and brick outer leaf. |
| Walls U-value | 0.10 W/m² K |
| Party walls description | 100mm mineral wool batts; 140mm Porotherm blocks |
| Party walls U-value | 0.30 W/m² K |
| Floor description | Concrete slab; 160mm Kingspan TF70 PIR boards; 60mm screed; tile finish |
| Floor U-value | 0.13 W/m² K |
| Glazed doors description | Velfac triple glazed 'Ribs All 2' inward opening units with safety glass. |
| Glazed doors U-value | 0.88 W/m² K uninstalled |
| Opaque doors description | Main entrance door Urban Front |
| Opaque doors U-value | 1.00 W/m² K uninstalled |
| Windows description | Velfac 200 Energy triple glazed inward opening units to most windows, plus 2 no. tilt and turn units from Velfac In 2 range. |
| Windows U-value | 0.90 W/m² K uninstalled |
| Windows energy transmittance (G-value) | 55 % |
| Windows light transmittance | 73% |
| Rooflights description | Fakro DXF-D U6 triple glazed flat units in PVC frame, glazing has two argon gas fills and 18mm warm edge spacers, and two low e coatings |
| Rooflights light transmittance | 54% |
| Rooflights U-value | 0.70 W/m² K |