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Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

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On Wednesday 13 November 2013, Blake Lapthorn's climate change team hosted a green breakfast seminar. Guest speaker Keeran Jugdoyal, Mechanical Engineering Manager at Faithful+Gould, talked about the lessons his company has learnt about the end use of sustainable buildings.

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Page 1: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

End Use of

Sustainable Buildings

Lessons Learnt

13th November 2013

Page 2: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

1. An introduction to sustainable buildings

2. The challenges to achieving them in reality

3. Post occupancy evaluation of sustainable buildings

4. Case study of the Marks & Spencer Sustainable Learning Store

5. Questions and answers

Agenda

Page 3: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Impacts of the built environment

• The construction and maintenance of buildings is responsible

for around half of UK carbon dioxide emissions.

• The construction industry consumes around 6 tonnes of

materials per year for every person living in the UK

• More than 400 million tonnes of materials get delivered to site

each year. Of these 60 million tonnes go straight to tip.

Page 4: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Regulatory and other drivers

• Revisions of Part L of the Building Regulations

• EU Energy Performance of Buildings Directive

• DEC’s and EPC’s

• Code for Sustainable Home

• Tax incentives

• Zero Carbon Targets

• 2016 for homes

• 2019 for non-domestic buildings

Page 5: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Recent Sustainable Buildings

Co-op Headquarters World Wildlife Fund Headquarters

Page 6: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

The Performance Gap

Most sustainable buildings do not perform as

well as the initial design claim

After a year of operation, London City Hall was consuming a reported 50% more energy than it had been predicted to consume

Page 7: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Pre-Occupancy Measures

• BIM and Soft Landings

• BREEAM

Page 8: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Pro

ject

tea

m e

ffo

rt

Briefing

Stage B

Design

Development

Stage D

Pre-

Handover

Stage P

Initial

Aftercare

Stage A

Years 1 to 3

Extended Aftercare

Stage Y

Page 9: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

• Technique for understanding how buildings are performing

• Includes monitoring of performance and occupant satisfaction

• Energy, carbon, waste, water, satisfaction, productivity

What is Post Occupancy Evaluation?

Page 10: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

• Understand the gap between design and actual performance

• Understand the importance of occupant engagement

• Save money

• Put greater onus on the design team / contractor

• Test if renewables worked

Why use it?

Page 11: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Productivity gains

Page 12: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Marks & Spencer Cheshire Oaks Eco Learning Store

Located in the Cheshire Oaks Retail Park near

Ellesmere Port

Gross internal area: 19,500 m² Net sales area: 13,800 m²

Covering two floors Complete with three cafes and a

extensive food hall

Plan A aspirations: Reduce the impact of M&S buildings

on the environment and become come more resource efficient

Page 13: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Building features

• The roof is made of FSC-certified glulam timber.

• 230 prefabricated Hemclad® panels have been

used in the wall delivering a design U value of

0.12.

• Aluminium “white” roof reflects excess heat.

• North lights in the roof to maximise the use of

natural light

• High level of air tightness <3m³/hr.m² @ 50 Pa

Page 14: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Low Carbon Building Services

• 300 kW wood pellet boiler

• Displacement ventilation system with six

independently controllable zones and free cooling

• Automatic light dimming system to utilise daylight

where available

• CO2 refrigeration system with CO2

piped directly to food cabinets and

cold rooms.

• Heat reclaim on the refrigerators.

• 80,000 litre rainwater harvesting

system predicted to reduce mains

water consumption by 25%

Page 15: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Biodiversity

• 300 m² living wall with 30 plant species.

• The retention of a swale area and pond

• 228 new trees

• 9 swift boxes have been built into the wall at concealed location for mating swifts to use.

• A further 6 bird boxes in the perimeter fence

• Wildflower meadow bank around edge of the store

Page 16: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Staff and customer enhancements

• Transport enhancements

o Improvements to cycle ways, crossings, roadway and

footpaths

o Contribution towards improved bus services

o Electric car charging points

o Staff shower and cycle stands to encourage cycling

• 400 new jobs

• Educational visits to schools and universities

• Interactive information points throughout the store

Page 17: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Planned activities

Overview of POE Tasks • 1 year’s worth performance monitoring

• Assess building envelope

• Benchmark against other buildings in the M&S portfolio

• Assess the sustainable features

• Survey staff and customers

• Review biodiversity

• Disseminate the good practice lessons

Page 18: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Questions the POE aims to answer

• Which features work, and which do not?

• Is the extra effort involved in providing these features worth the effort?

• Are operational costs reduced? – Initial signs are promising as we will see.

• Do the store’s features attract more customers and generate more sales?

• What are the key lessons to be carried over to future developments?

Page 19: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Performance Targets for the Store

Page 20: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Design and construction data

• To fully understand the post occupancy performance of a building, an understanding is required of the events leading up to it being put into use.

• Design documents provide the basis of understanding how the building was originally intended to operate.

• Issues arising during construction can cause the design of a building to be altered away from the original intent.

• Issues arising during the operational phase

can sometimes trace their roots back to

issues at the design, construction or

commissioning phase.

Page 21: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Measuring Energy Performance

Building management system

Page 22: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Monthly energy reporting

Sample monthly energy report

Page 23: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Lighting – Electricity use carpet plot

Days over the monitoring period

Ho

urs

of

the

day

Good at switching off outside trading hours.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

1:00

2:00

3:00

4:00

5:00

6:00

7:00

8:00

9:00

10:00

11:00

12:00

13:00

14:00

15:00

16:00

17:00

18:00

19:00

20:00

21:00

22:00

23:00

0:00

Page 24: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Building Fabric Performance

Contractor’s survey focused on integrity of the insulation

F+G’s survey focused on the building’s heat

loss

Page 25: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Building fabric performance

External temperatures less then 0°C

Thermal imaging surveys cannot verify air tightness of a building and therefore other methods are required.

21.30°C

20.65°C

23:00 07:00

Page 26: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Biodiversity findings

• Sources of information include:

Pre-construction habitat survey

Post-construction habitat survey

BREEAM retail assessment

Site biodiversity meeting

• A site biodiversity action plan has be

produced. The plan has 9 site specific

targets which are all on track to be

achieved - examples:

No loss of amphibian breeding,

foraging and shelter habitat.

Retain and protect hedgerows

where practicable

Page 27: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Results

Page 28: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Electricity performance against benchmarks

Page 29: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Staff Survey

Page 30: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Lessons learnt from Cheshire Oak

Key factors that contribute to the successful operation of the building:

• Clear vision for the building expressed through Plan A and the

Sustainable Construction Manual.

• Close collaboration with designers and contractors throughout the

construction and commissioning process.

• Detailed hand-over process with clear operation and maintenance

manuals.

• Post occupancy workshops which bring together designers, contractors

and facilities staff to examine the building’s performance in use.

Page 31: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Lessons learnt continued

The fundamental principles of energy efficient building design

are well known. Don’t lose sight of them:

• Good insulation

• High levels of air tightness

• Limited thermal bridging

• Maximise natural light

• Reduce solar gains

• Simple HVAC systems are easier to control and

monitor

Page 32: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Lessons Learnt Continued

Issues encountered:

• Difficult to assess the performance of certain sustainable features due to

lack of consideration to monitoring at the design stage.

• Initial resistance from some stakeholders not use to sharing information with

third parties.

• Challenging to interpret some of the data received without knowing the day

to day activities in the building.

Page 33: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Conclusions

• Post Occupancy Evaluations can provide feedback on how a buildings are

performing against original concept.

• The assessment of the hard technical measures such as energy use must be

performed in tandem with soft analysis from the building users in order to

provide meaningful results.

• The process allows operational savings to be identified that might never be

spotted in the normal day to day operations of a building. Hence the

importance of using third parties.

• It provides good quantitative data on how a building is performing that can be

used to inform future building projects.

• The techniques can be applied to assess existing poor performing buildings.

Page 34: Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful+Gould

Keeran Jugdoyal

Senior Engineer

[email protected]