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Download Housing resilience Prof. Fionn Stevenson Sheffield School of Architecture
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Faculty of Social Science Sustainable Urban Institute Resilience Pecha Kucha 22nd October 2015 Housing resilience Prof. Fionn Stevenson Sheffield School of Architecture The problem with housing… Smart’ buildings = increasing the use of technology Optimising systems – cannot cope with uncertainty Climate adaptation based on products - not interactivity adaptivity Climate change denial = ‘control’ the environment Examining 3 case studies in UK Case study Lancaster Cohousing Completion Location Size + units 2012 Semi-Rural Medium, 35 units Owned New build terrace houses/ apartments in blocks Masonry and timber frame, clay roof tiles, timber floor PV panels, MVHR, communal biomass/solar thermal, radiators House types Fabric materials Energy, heating and ventilation features Energy standards Passivhaus certified, ‘Zero Carbon’ Code for Sustainable Homes level 6 (UK) LILAC Cohousing 2013 Urban Medium, 20 units Mutually owned New build terrace houses/ apartments in blocks Saxton Gardens 2011 Urban Large, 200 units Owned/rented Refurbishment 1950’s apartment block Straw/timber panel system, flat roof, concrete floor Concrete structure and slabs, SIPS panels, flat roof MEV, thermostatic programmed electric heating panels PV panels, MVHR, natural gas boilers in each home, radiators Code for Sustainable Homes Level 4 2006 Building Regulations for retrofit in UK Eco Homes Very Good Lancaster Co-housing 5 ing, UK LILAC Co-housing Leeds 25/05/2017 © The University of Sheffield 6 Saxton Gardens housing Leeds 25/05/2017 © The University of Sheffield Critical vulnerabilities Heating sources Saxton = national grid for electricity is single source of heat Lancaster = robust and resilient with multiple power sources (PV, hydro, biomass, solar thermal, natural gas backup) LILAC = natural gas, national grid for electricity only Ventilation systems MVHR, MEV = poor interactive adaptivity, failure to respond after power cuts, occupants forget controls or fail to understand them. Critical vulnerabilities Windows and doors Saxton = only minimal 10cm openings leading to overheating (only 30% openable area of glazing) Lancaster and LILAC = larger openings (50% of glazing area) Critical vulnerabilities Building fabric Saxton = MEV switched off but leaky fabric provides enough ventilation Little solar shading in any of the case studies Balconies only provide part shading in Lancaster Lessons for co-evolutionary adaptivity 1. Future proof buildings for sequential upgrades – remember natural ventilation strategies 2. Create redundancy and diversity in ventilation system 3. Stress test for affordance – how usable is the building in extreme situations? 4. Develop passive co-evolutionary strategies 5. Collective learning on site – new tools being developed Thank you – any questions?
