Draft:Ditchingham Passivhaus
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Ditchingham Passivhaus is a residential estate located in Lower Wells Close, Ditchingham, Norfolk, adjacent to the conservation area for Tayler & Green Grade II listed buildings which was built in the 1950s.[1]Ditchingham Passivhaus was completed in 2012 as an affordable housing project that comprises 14 dwellings designed to meet the local needs for affordable housing, all built to the Passivhaus standard on a rural exception site (RES).[2]
Rural exception sites (RES) are used to provide additional affordable housing in locations where housing would typically not be permitted. Generally, only affordable housing can be built on RES. But in some cases, market housing can be built on RES, only under the local authority's permission. For example, when the profit from selling the market housing is necessary for the construction of affordable housing. The RES affordable housing is made for those who have an existing family or job or are currently living in the local community.[3]
The project was designed by the architect Parsons + Whittley and was occupied in August 2012. Ditchingham Passivhaus won the UK Passivhaus Award 2013 held by Passivhaus Trust[2]. It has gained the Code for Sustainable Homes level 4 and Passivhaus certification through BRE.[2][4]
| Name | Ditchingham Passivhaus |
| Location | Lower Wells Close, Ditchingham, NR35 2SB |
| Building Type | Mix of 1-bed, 2-bed and 3-bed flats, bungalows, and houses |
| Construction Type | Brick/block cavity construction |
| Completed in | August 2012 |
| Occupancy Status | Occupied since August 2012 |
| Construction Cost | £1454/sqm |
| Area | 1313 sqm |
| Client | Hastoe Housing |
| Consultants | Davis Langdon |
| Certifier | BRE |
| Architect | Parsons+Whittley |
| Contractor | Keepmoat |
| M&E | ESC Ltd |
| Structural Engineers | Richard Jackson |
| PLC Contractor | Bramall Construction Ltd (Keepmoat) |
Location[edit]
Ditchingham Passivhaus is located on an exceptional rural site in Lower Wells Close, Ditchingham, Norfolk, to the southeast side of Norwich. The estate is positioned along a curved street that runs from northwest to southeast, within a single curved terrace. On the southeast side of the project is the Tayler & Green (Herbert Tayler and David Green) Grade II listed building conservation area.[6] The conservation area was located on the north of the former Loddon Rural District Council and covers Windmill Green (1946-49) to the east, Agnes Green Crescent (1951), and Scudamore Place (1958 and 1964).[7]
Description[edit]
Design Stratagy[edit]
Parsons and Whittley was a Norfolk-based architectural firm(2002–2021). For the Ditchingham Passivhaus, the firm aimed to design a sustainable project using normal UK construction skills. The terrace was designed in a single curved shape and ended up in one corner of the field with the front of the curve following the sun around, which was one of the Tayler and Green idioms. Inlet and exhaust provided through roof punctuating 'chimneys' intended to merge into the existing local architectural style.
The terrace used a 30mm cavity block wall in conjunction with specially made wall ties and cavity closers, which were intended to provide enough volume for insulation to deliver passive standard U-value. The cavity wall is filled with 300mm, of Isover Hi-Cav 32 Glass mineral wool, with 300mm of Styrofoam Floormate laid within the base of the cavity up to DPC level. Dense concrete block inner skin, precast concrete floor, and trussed rafter roof were used as the inner structure. The airtightness is achieved by using the traditional construction method, a wet plaster finish.[8]
Water-saving tabs and shower fittings were used to reach a standard of less than 105 Litres per person per day as part of Code for Sustainable Homes level 4(subject to certification). Low-energy lighting, solar panels, triple-glazed windows, and Genvex compact units have been utilized to save energy and support heating and MVHR.[9]
Estate[edit]
The estate consists of a mix of 1-bed, 2-bed, and 3-bed flats, bungalows, and houses. There are 8 two-storey houses, with two single-storey bungalows at the south end, one single bungalow at the north end, and 3 flats.[10][8] A large area of grassland is located on the south side, between the Tayler & Green Grade II listed buildings and the property.[7]
| Primary Energy Demand | 108 kWh/m².a |
| Heating and Cooling Load | 9 W/m² |
| Heating & Ventilation strategy | Heating/DHW and ventilation is provided via the Genvex Combi 185 unit which is a combined heat recovery ventilation and domestic hot water heat pump appliance. An air-source heat pump heats the air and 185 litres of domestic hot water, prioritising the hot water. The unit is provided with an Optima 310 Design controller. A post-MVHR duct heater (Total Home Environments PR613) is installed to provide additional heating during extreme periods of cold. Additional heating is provided to bathrooms in the form of a local electric towel rail. |
| Shading strategy | Overhanging eaves / external blinds. |
| U values W/(m²K) | Exterior wall 0.098, Roof 0.080, Floor 0.089, Windows 0.65, Doors 0.82 |
| Space heating energy demand | 11kWh/(m2a) (Taken from certified PHPP) |
Bibliography[edit]
- ^ a b Passivhaus Trust. "UK Passivhaus Awards 2013" (PDF).
- ^ a b c "UK Passivhaus Awards 2013: Ditchingham Passivhaus" (PDF). Passivhaus Trust UK Passivhaus Awards 2013. 2013.
- ^ The National Planning Policy Framework. London: Department for Levelling Up, Housing and Communities. 5 September 2023. p. 72.
- ^ "UK Passivhaus Awards 2013". 2013.
- ^ Passivhaus Trust. "UK Passivhaus Award 2013" (PDF).
- ^ "Tayler and Green and Loddon Rural District Council, Part II: 'a triumph of artistic patronage". Municipal Dreams. 17 December 2019. Retrieved 2 November 2023.
- ^ a b "Ditchingham: Draft Conservation Area Character Appraisal and Management Guidelines". Draft Conservation Area Character Appraisal and Management Guidelines: 10. July 2022 – via South Norfolk Council.
- ^ a b Hearne, John (Feb 28, 2014). "Affordable housing scheme: DELIVERS CERTIFIED PASSIVE RESULTS". Passive House Plus Sustainable Building (3): 38–45 – via Issuu.
- ^ Hardi, Jennifer (1 May 2013). "Cost of Building to Passivhaus Standard [Briefing Paper 008]". Norwich Centre for the Built Environment. 8: 3 – via LSBU Open Research.
- ^ a b Passivhaus Trust. "UK Passivhaus Award 2013" (PDF).
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