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

2. About PRP 9th largest UK architectural practice Fee turnover:
£21.5m
£20.0m
£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

3. 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

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

5. PRP and BDa

6. 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

7. 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."

8. 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

9. Site Layout

10. The Site

11. Upper floor plan

12. Section concepts

13. 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

14. 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

15. 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

16. 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

17. 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%

18. 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

19. Costs

20. 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