Architectural Practice of the Year Building Awards 2007 Ziba Adrangi Associate Director

About PRP 9th largest UK architectural practice Fee turnover: 2005-2006 £21.5m 2004-2005 £20.0m 2003-2004 £17.5m Over 340 staff Turnover spilt: 40% Affordable 27% Private 19% Specialist Housing & Healthcare 1% Education 4% Master planning 3% Other 6% Project Management

Core services regeneration affordable housing mixed use specialist housing office leisure private housing healthcare education retail planning Environmental Services landscape design model making project services visualisation master planning / urban design interior design consultation architecture

Exemplar New Build St Matthews Keyworker, Brixton Client: Presentation HA Features: Biomass boiler, Solar hot water, Thermal Mass, Super insulation levels

PRP and BDa

Taking the lead ‘Sustainability has come from nowhere to become one of Londoners top three concerns along with crime and the cost of living. We want Londoners to take the lead on sustainability.’ Ken Livingstone , MIPIM Cannes, 2006

Measuring Market Value Mayor of London, Ken Livingstone said: "The high-quality, low-cost design achieved by PRPZedFactor at St Matthews sets the standard for what we should be achieving in every social housing development in London. “Given the choice, most people would rather live in an energy efficient building like this, with lower bills and higher year-round comfort. And the big reductions in carbon emissions will help London play its role in the increasingly urgent task of tackling global warming."

St Matthews – Brief 12 Key-worker Flats, 6 1B2P and 6 2B4P for rent Challenge Funding for “Innovation” Phase 1 of estate regeneration Zero heating specification £75 per annum energy costs per household Cost constrained

Site Layout

The Site

Upper floor plan

Section concepts

Specification Super-insulated building envelope 2. High thermal mass Triple glazing or double glazing warm edge technology Airtight construction Prevents heat and coolth loss 2. High thermal mass Stores heat gains from occupation and from sunny days Keeps homes cool on hot sunny days 3. Heat exchange ventilation Maintains a healthy air quality Mechanical ventilation with heat recovery 4. South facing sun spaces with high performance windows Allows large windows to be used without heat loss Brings sunlight into living spaces Allows the sun to provide up to 30% of the space heating requirement

Specification 5. Zero carbon space heating requirement Central bio fuel boiler Solar thermal panels Low fuel bill 6. Clear upgrade path to a full ZED Avoids future fuel poverty Allows the building to not contribute to global warming Future installation of photovoltaics Future installation of wind turbines 7. Other measures Anti allergen environment, no carpets Reduction in use of toxic materials

Part L Specification 2002 Part L 2006 Part L1a 2010 Part L1a 50mm Wall Insulation Individual Gas Boilers Standard Double Glazing Balcony only Air tightness 12cum/h.sqm Additional NIA 85sqm 100mm Wall Insulation Condensing Gas Boilers Medium Spec D.Glazing Balcony only Air tightness 10cum/h.sqm Additional NIA 85sqm 150mm Wall Insulation Condensing Gas Boilers High Spec Double Glazing Balcony only Air tightness 8cum/h.sqm Additional NIA 74sqm

Future-Proofing Building orientation Roof slope orientation and pitch Roof finishes Surfaces for Photovoltaics Aero-dynamics Structural implications of turbines Flexibility and accessibility of Services/Plant space

ZED standards construction Zero Heating-As Built Zero Carbon Energy plus ZED construction standards plus 300mm wall insulation Biomass Communal Boiler Triple Glazing Balcony & Sunspace Air tightness 8cum/h.sqm Solar Thermal + Water Store Mechanical HRV ZED construction standards plus 300mm wall insulation Biomass Communal Boiler Triple Glazing Balcony and Sunspace Air tightness <5cum/h.sqm Solar Thermal + Water Store Wind assisted HRV Turbine ZED construction standards plus 300mm wall insulation Biomass Communal Boiler Triple Glazing Balcony and Sunspace Air tightness <5cum/h.sqm Solar Thermal + Water Store Wind assisted HRV Turbine Photovoltaics Cost Uplift 10% Cost Uplift 17%

Building envelope average U-value Thermal Insulation Cost Effectiveness Heating System cost 50mm + D glazing 300mm + T glazing + low-E 100mm + D glazing + low-E Energy payback period Super-insulation becomes cost effective at the point where the heating system can be omitted Building envelope average U-value

Costs

St Matthews – Lessons Learnt ZED Standards super-insulation, windows and high thermal mass Super-insulation key to conservation of bio-mass Frame solution to satisfy MMC is possible with cementitious internal lining Orientation and sun space not essential HRV Mechanical only with on site electricity generation Avoid technologies reliant on electricity Keep plan simple, avoid recesses and steps if possible Decide on which green technology from day one Plan for future upgrades Allow for additional costs but could reduce if volumes increase