Greendale Studio
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as PDF A small industrial unit created as an artists studio near Canterbury, Kent. Timber portal frame, rammed chalk mass wall. Certified Passivhaus light industrial building.
Greendale Studio : 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 | - | - | - |
|---|---|---|---|
| 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 kWh/m².yr | - |
Renewable energy
| Electricity generation | Forecast | Measured |
|---|---|---|
| PV array | - | - |
| 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 | PHPP |
|---|---|
| Other whole house calculation method | - |
| Energy target | PassivHaus |
| Other energy targets | - |
| Forecast heating load | 12 W/m² demand |
Airtightness
| Date | Result | |
| Pre-development air permeability test | 03 November 2010 | 0.52m³/m².hr @ 50 Pascals |
|---|---|---|
| Final air permeability test | - | - |
Project description
| Stage | Occupied |
|---|---|
| Start date | 01 March 2010 |
| Occupation date | 21 February 2011 |
| Location | Canterbury Kent England |
| Build type | New build |
| Building sector | Industrial |
| Property type | Detached |
| Construction type | Softwood frame |
| Other construction type | Portal frame constructed from I beams and web stiffeners |
| Party wall construction | |
| Floor area | 161.5 m² |
| Floor area calculation method | Treated Floor Area (PHPP) |
| Building certification |  Passivhaus certified building |
Project Team
| Organisation | Conker Conservation Ltd |
|---|---|
| Project lead person | Paul Mallion |
| Landlord or Client | Nigel Cooke Industries |
| Architect | Joanne Cooke |
| Mechanical & electrical consultant | PCS Consulting Ltd |
| Energy consultant | Warm |
| Structural engineer | S.C.Green Ltd |
| Quantity surveyor | |
| Consultant | |
| Contractor | Ecolibrium Solutions Ltd |
Design strategies
| Planned occupancy | Artists studio where very large contemporary works are created on canvases up to 4m by 2m. |
|---|---|
| Space heating strategy | Underfloor heating plus heater battery in MVHR. Heat provided by Windhager BioWin Plus wood pellet boiler serving studio, bungalow and holiday flat on a district heating main. |
| Water heating strategy | 800 litre thermal store with flash coil, also linked to solar thermal system. |
| Fuel strategy | Wood pellets sourced from Kent (mostly sweet chestnut) with electrical back up. |
| Renewable energy strategy | PV array on south east facing roof |
| Passive Solar strategy | Large south west facing window into Drawing Studio, otherwise solar gain avoided due to influence on lighting for painting. |
| Space cooling strategy | MVHR, openable windows, and automatic external venetian blind over large south west window. Large rammed chalk wall to act as thermal mass in centre of building. |
| Daylighting strategy | 5 large triple glazed rooflights by Fakro, small number of windows in walls. Large south west window in Drawing Studio. |
| Ventilation strategy | Paul Maxi 1200 MVHR unit installed by MEL Dust and Fume Ltd, to cope with extraction of heavy solvent paint fumes and constant ventilation needs. Post heater fed from thermal store. |
| Airtightness strategy | Proclima Intello internal air barrier sealed with Unitape. External Tyvek wind barrier also sealed with tape. |
| Strategy for minimising thermal bridges | Foamglas used externally to prevent bridging at edges of piled raft foundations. Additional layer of internal insulation placed between service void battens to reduce bridging from portal frame web stiffeners. |
| Modelling strategy | PHPP |
| Insulation strategy | Structure required 400mm I joists to allow frame to work as a portal, void is fully insulated with blown Knauf Perimeter Path,K = 0.033 @ 30 kg/m3Info sheet attached (Datasheet - ECOSE Glass Perimeter Plus)Fill service voids with Steico Canaflex 50 mm thick, K = 0.044.Roof same as walls. Floor 250mm of polyurethane under 150mm concrete slab. |
| Other relevant retrofit strategies | |
| Contextual information | Area of high landscape value determined that roof should be pitched, clay tiled, and ridge as low as possible. Orientation limited by site, privacy and security. |
Building services
| Occupancy | As designed. |
|---|---|
| Space heating | as design |
| Hot water | as design |
| Ventilation | MVHR system as design |
| Controls | |
| Cooking | none |
| Lighting | |
| Appliances | |
| Renewable energy generation system | PV array |
| Strategy for minimising thermal bridges | Timber frame without roof ties. Psi calculations on floor/wall junctions. |
Building construction
| Storeys | 15 |
|---|---|
| Volume | 767m³ |
| Thermal fabric area | 69777 m² |
| Roof description | Clay tiles, batten and counter batten, OSB sheathing, 400mm timber I joist, blown mineral wool insulation, sheathing board and service void, plywood internal lining. |
| Roof U-value | 0.09 W/m² K |
| Walls description | Sweet chestnut cladding, batten void, tyvek, OSB sheathing, 400mm I joists, blown mineral wool, OSB sheathing, batten void partially insulated, plywood internal lining. |
| Walls U-value | 0.10 W/m² K |
| Party walls description | |
| Party walls U-value | - |
| Floor description | 100mm polished concrete screed, 100 mm Phenolic Foam - Kingspan K7 board K value 0.020 W/m2K, on top of 150 mm Thermafloor TF70, K value 0.022 W/m2K, on 200mm concrete raft with low density EPS clay heave board. |
| Floor U-value | 0.09 W/m² K |
| Glazed doors description | Internorm triple glazed. |
| Glazed doors U-value | - - |
| Opaque doors description | Internorm, one modified to form industrial door 3m in height. |
| Opaque doors U-value | 0.80 W/m² K installed |
| Windows description | Internorm |
| Windows U-value | 0.84 W/m² K installed |
| Windows energy transmittance (G-value) | 56 % |
| Windows light transmittance | 0.5% |
| Rooflights description | Fakro Thermo FTT, with thermo flashing and airtight collars kits. |
| Rooflights light transmittance | 49% |
| Rooflights U-value | 1.04 W/m² K |