Architectural Practice of the Year Building Awards 2007

Ziba Adrangi

Associate Director

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

About PRP

Core services

mixed use

private housing

Environmental Services

affordable housing

master planning / urban design

educationhealthcare

architecture

regeneration

project serviceslandscape design

leisure officeretail

consultation

model making

visualisation

planning

interior design

specialist housing

St Matthews Keyworker, BrixtonClient: Presentation HA Features:Biomass boiler, Solar hot water, Thermal Mass, Super insulation levels

Exemplar New Build

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

1. Super-insulated building envelope 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 Prevents heat and coolth loss 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

Specification

• 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

2006 Part L1a2002 Part L 2010 Part L1a

Part L Specification

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

• 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

Zero CarbonZero Heating-As Built Energy plus

Cost Uplift 10% Cost Uplift 17%

50mm + D glazing

300mm + T glazing + low-E

100mm + D glazing + low-E

Building envelope average U-value

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Heating System cost

Super-insulation becomes cost effective at the point where the heating system can be omitted

Thermal Insulation Cost Effectiveness

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