Achieving EnerPHit at scale: Case study of Wilmcote House tower block refurbishment. Loreana Padron & Nick Newman ECD Architects

Transcription

1 Achieving EnerPHit at scale: Case study of Wilmcote House tower block refurbishment Loreana Padron & Nick Newman ECD Architects

2 ECDA tower block refurbishments Barley Mow Roscoe Towers Seaton Point Hutchesontown Ferrier Point Edward Woods Estate

3 Edward Woods Estate Before and after the refurbishment

4 Wilmcote House

5 Wilmcote House

6 Wilmcote House External walkways Living room and door to balcony Open balcony

7 Works: Envelope New steel structure Proposed new external wall Existing wall of living room and open balcony Maisonettes Bedroom Living room Balcony Bedroom Kitchen/Dining Walkways Flats

8 Works: Envelope Existing envelope: Proposed envelope (preferred option): Schematic of the maisonette form pre and post-retrofit (Access deck on the South-East elevation) Teli, D. et al., Impact of current occupant behaviour on potential carbon savings in a council owned tower block undergoing retrofit. University of Southampton, 2014

9 Works: Existing envelope

10 Works: Envelope Enclosed walkways Enlarged enclosed sun-space Enlarged living room

11 Works: Windows

12 Works: Roof

13 Works: Maisonettes Bedroom Bedroom Bedroom Bathroom HWC WC MVHR Kitchen / Dining Living room Walkways / access deck Sunspace Existing wall of living room and open balcony Extended 7m 2 Proposed new external wall Lower level Upper level

14 Pilot maisonette: MVHR in existing cupboard Existing cupboard in entrance hall Paul Focus 200 installed and running

15 Pilot maisonette: MVHR system Supply valve in bedroom and ducts in existing riser Temporary exhaust and intake valves to corridor. After enclosing the walkways these will be extended to the external wall

16 Pilot maisonette: bulkheads for ducts New entrance door and lowered ceiling for exhaust and intake ducting Ducts boxed-out in a bedroom to connect them to the riser

17 Pilot maisonette: M&E New storage heater in bedroom New insulated hot water cylinder

18 Initial consultation (2012) Addressing social and comfort concerns: 1. Can t afford to heat 1. EnerPHit significantly reduces space heating bills

19 Initial consultation (2012) Addressing social and comfort concerns: 1. Can t afford to heat 2. No control over temperature 1. EnerPHit significantly reduces space heating bills 2. EnerPhit stabilises temperature

20 Initial consultation (2012) Addressing social and comfort concerns: 1. Can t afford to heat 2. No control over temperature 3. Mould in wardrobes/poor health 1. EnerPHit significantly reduces space heating bills 2. EnerPhit stabilises temperature 3. Heat recovery ventilation and warm surfaces

21 Initial consultation (2012) Addressing social and comfort concerns: 1. Can t afford to heat 2. No control over temperature 3. Mould in wardrobes/poor health 4. Drying clothes a problem 5. Falling objects/child safety 1. EnerPHit significantly reduces space heating bills 2. EnerPhit stabilises temperature 3. Heat recovery ventilation and warm surfaces 4. Flexible balcony / sunspace design 5. Enclosed walkways / sunspace

22 Initial consultation (2012) Addressing social and comfort concerns: 1. Can t afford to heat 2. No control over temperature 3. Mould in wardrobes/poor health 4. Drying clothes a problem 5. Falling objects/child safety 6. No hot water when needed 1. EnerPHit significantly reduces space heating bills 2. EnerPhit stabilises temperature 3. Heat recovery ventilation and warm surfaces 4. Flexible balcony / sunspace design 5. Enclosed walkways / sunspace 6. New electric showers and insulated HW system

23 Initial consultation (2012) Addressing social and comfort concerns: 1. Can t afford to heat 2. No control over temperature 3. Mould in wardrobes/poor health 4. Drying clothes a problem 5. Falling objects/child safety 6. No hot water when needed 7. No security 1. EnerPHit significantly reduces space heating bills 2. EnerPhit stabilises temperature 3. Heat recovery ventilation and warm surfaces 4. Flexible balcony / sunspace design 5. Enclosed walkways / sunspace 6. New electric showers and insulated HW system 7. Fob entry system to enclosed walkways /cycle stores

24 Initial consultation (2012) Addressing social and comfort concerns: 1. Can t afford to heat 2. No control over temperature 3. Mould in wardrobes/poor health 4. Drying clothes a problem 5. Falling objects/child safety 6. No hot water when needed 7. No security 8. Unloved visual appearance 1. EnerPHit significantly reduces space heating bills 2. EnerPhit stabilises temperature 3. Heat recovery ventilation and warm surfaces 4. Flexible balcony / sunspace design 5. Enclosed walkways / sunspace 6. New electric showers and insulated HW system 7. Fob entry system to enclosed walkways /cycle stores 8. Renewed appearance / sense of pride

25 Purpose Consultation after pilot maisonette open-day (2013) 25 Residents perspective on what the scheme should achieve overall Improve Warmth of property, 23 Antisocial, security & Safety, Overall improved living conditions, 16 Reduce costs of bills, Eliminate Damp, 7 5 Appearance of the block, 4 Eliminate draughts, 2 Constant hot water, 2 Showers, 1 Carpets, 1 Larger property, 1 Reduce smells from neighbouring properties, 1 0 TOTALS

26 Enerphit analysis

27 North facade of Wilmcote House: As existing

28 North facade of Wilmcote House: Thermographic overlay

29 North facade of Wilmcote House: Thermographic overlay

30 North facade of Wilmcote House: Thermographic overlay Thermographic image courtesy of Teli, D. et al.university of Southampton, 2014

31 Typical base detail showing perimeter insulation (in section)

32 Typical window detail showing triple glazing (in plan view)

33 Typical eaves detail showing roof structure (in section)

34 Penetrations showing intake/exhaust ducts (in section)

35 Fin detail showing cold bridging remediation (in plan view)

36 Air-tightness strategy

37 Air-tightness strategy... and Thermal Envelope

38 Beta testing of Sketchup Plugin...

39 ...and conventional measuring!

40 Next steps: Europhit funding Wilmcote House has been chosen as the UK case study project for the Passive House Institute s EuroPHit project EuroPHit

41 Next steps: Europhit funding Step by step EnerPHit + RES Retrofit dissemination step suitable products by financing instruments Building stock step pilot projects criteria and software tool EuroPHit

42 Next steps: Europhit funding Step by step EnerPHit + RES...And beta testing of PHPP v9! step Retrofit dissemination suitable products by financing instruments Building stock step pilot projects criteria and software tool EuroPHit

43 Thank you. ECD Architects Ltd Studio 3, Blue Lion Place, 237 Long Lane, London SE1 4PU T: