Transcript Working with the Code for Sustainable Homes

Gaining Approval and Meeting the
Standards
Horsham District Council
Sussex Building Control
WPL Ltd
working with you to build a safer, sustainable Sussex
Welcome & Introduction
Ray Lee
Director of Development & Environment
Horsham District Council
working with you to build a safer, sustainable Sussex
The Council’s perspective on
sustainability
Robert Nye
Cabinet Member for Environment and Sustainability
Horsham District Council
working with you to build a safer, sustainable Sussex
How to get the planners to say ……
Ray Wright
Head of Development
Horsham District Council
working with you to build a safer, sustainable Sussex
Ray Wright
Head Of Development
‘How to get planners to say…..’
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PLANNING POLICY BACKGROUND
1987 – World Commission on Environment and
Development
1992 – Local Agenda 21
1997 – World Climate Conference – Kyoto
2000 – The Nottingham Convention
2003 – Energy White Paper – the ‘60% target’ .
2003 – The London Borough of Merton adopted its
UDP Policy.
- The ‘Merton Rule’
- By 2006 120 Authorities were operating
‘Merton Rule’ policies.
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PRESENT POLICY FRAMEWORK
2004 – PPS 22 ‘Renewable Energy’
2007 – PPS 1 ‘ Planning and Climate Change’ –
Supplement
30 April 2009 ?? – The South East Plan
Local Development Frameworks
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HORSHAM POLICY
LDF Core Strategy Policy CP 2 ‘Environmental Quality’
LDF General Development Control Policies Policy DC8 ‘Renewable
Energy and Climate Change.’
This states :a) Planning permission will only be granted for proposals which
ensure that :
- measures are incorporated that reduce the impact on climate
change;and
- wherever possible and certainly for any development of 10 or
more dwellings and other forms of major development, sufficient
on-site renewable energy equipment or other design measures
are provided to achieve at least a 10%
reduction in the scheme’s predicted carbon dioxide emissions.
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HORSHAM POLICY
b) The Council will permit schemes for renewable energy ( eg solar,
biomass, and energy crops, landfill gas and hydroelectricity ), where
they do not have a
significant adverse effect on landscape character, wildlife, areas of
historical significance or amenity value.’
Renewables versus Sustainable Design and Construction.
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APPLICATION PROCESS
Pre Application – examine policy and consider potential at
the outset.
Application – details in ‘energy statement’ or ‘design and
access statement.’
Processing – ensure case officer is satisfied with the
details.
Committee – divergent member views
Decision – conditions should be expected if permission is
granted.
- many authorities will specifically refuse permission
if ‘renewables’ not addressed.
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EXAMPLES OF CONDITIONS – renewables
London Borough of Merton
No works in relation to the proposed development shall commence on
site pursuant to the planning permission until details of a renewable
energy generation system for the proposed….development which
provides at least 10% of the predicted energy requirements have been
submitted and approved by the local planning authority and suitably
and operational to the satisfaction of the local planning authority prior
to the occupation of the accommodation.
London Borough of Enfield
The development shall be carried out in accordance with the
measures identified in the sustainability assessment form submitted
on … ( and amendments received..) . Before the development is first
occupied, the developer shall submit to the LPA a statement
confirming that the development hereby approved has been so carried
out.
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EXAMPLES OF CONDITIONS – renewables
Woking Borough Council
Prior to the commencement of any development, details of predicted
energy use of the development and the generation of on- site
renewable energy shall be submitted and approved by the Local
Planning Authority. These details will demonstrate how energy
efficiency is being addressed, including bench mark data, and show
the on-site measures to be taken to produce a minimum of 10 per cent
of the total energy requirements of the new development by means of
renewable energy sources. Such details as may be approved shall be
implemented and retained in perpetuity.
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INSPECTORS CONDITION – code for
sustainable homes.
No development shall take place until an initial design
stage assessment by an accredited assessor for the Code
for Sustainable Homes has been carried out and an
interim certificate has been submitted to and approved in
writing by the local planning authority stating that each
dwelling has been designed to achieve a minimum of
Level 3 of the Code (or an equivalent level of performance
if an alternative independently assessed means of
sustainability assessment is used). No dwelling shall be
occupied until a final certificate stating that the dwelling
complies with a minimum of Level 3 of the code has been
submitted to the local planning authority.
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FROM NOW ON
More LDF’s with ‘Merton Rule’ policies
More of those policies will be prescriptive and ‘require’ rather
than ‘encourage’
The level at which the policy operates will reduce
For the next speaker but The Code for Sustainable Homes
requirements ( level 3 -2010, level 4 - 2013, and level 6 2016 ), are increasing, with level 5 requirements meaning
that on site renewables are essential
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Working with the Code for
Sustainable Homes
Stephen Shorrocks
Acting Head of Building Control
Sussex Building Control
working with you to build a safer, sustainable Sussex
Obtaining a rating
• Design Stage
– Early involvement
• Interim certificate
– Planning / Funding
• Monitoring
• Post Construction Stage
– What has been achieved
• Final Certificate
– Following QA process
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Code Levels
Total points score
(equal or greater than)
Level 1 ()
36 points
Level 2 ()
48 points
Level 3 ()
57 points
Level 4 ()
68 points
Level 5 ()
84 points
Level 6 ()
90 points
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Category weightings
Category
No. of credits
available
Weighting factor
Points score for
each credit
1 – Energy
29
36.4%
1.26
2 – Water
6
9.0%
1.50
3 – Materials
24
7.2%
0.30
4 – Surface water
4
2.2%
0.55
5 – Waste
7
6.4%
0.91
6 – Pollution
4
2.8%
0.70
7 – Health
12
14.0%
1.17
8 – Management
9
10.0%
1.11
9 – Ecology
9
12.0%
1.33
104
100.0%
-
Total
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Mandatory elements
• Mat 1 – Environmental Impact of
Materials
• Sur 1 – Surface Water Run-off
• Was 1 – Household Waste
Storage
• Was 2 – Site Waste
Management
• Ene 1 – Dwelling Emission Rate
• Wat 1 – Internal Water Use
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Key areas – changes during construction
• Insulation materials / construction method
– Ene 1 – SAP calculations
– Mat 1 – Green Guide rating
– Pol 1 – GWP of insulants
• Bathroom fittings
– Wat 1 – Internal water use
• Robust details
– Hea 2 – Sound insulation
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Specialist advice required
• SAP assessor – Ene 1,
Ene 2, Ene 7
• LZC energy specialist –
feasibility study Ene 7
• Quantity Surveyor – Mat
2, Mat 3
• Drainage engineer – Sur
1, Sur 2
• Daylight calculations –
Hea 1
• Crime Prevention Design
Advisor – Man 4
• Ecologist – Eco 1 - 4
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Practical example – Level 1
• Energy efficiency –
10% improvement
over building
regulations
• Water use – max 120
litres / person / day
• Other minimum
requirements
• Further 33.3 points
required
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Practical example – Level 3
• Energy efficiency –
25% improvement
over building
regulations
• Water use – max 105
litres / person / day
• Other minimum
requirements
• Further 46.7 points
required
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Conclusions
• Some areas effective, others out of
balance in importance
• Radical change for water consumption
• Benefits ecologically sensitive design
• Culture changing
• Promoting innovation
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Tea & Coffee Break
Resume at 11.40
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Welcome Back
David Starr
Principal BCO
Sussex Building Control
working with you to build a safer, sustainable Sussex
Climate change and Building
Control
What does it have to do
with us?
David Starr
What do we have to say?
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Introduction.
The position in which we find ourselves.
The story so far.
How the regulations have changed over the
recent years.
What we have seen.
The way SAP, energy calculations, drainage
and permeability design have been used.
Better by design.
Improvement on good design.
Introduction
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Changing emphasis, requirements and
concerns.
Horsham district council Climate change
working group.
Getting advice.
Introduction
The Times
January 29, 2009
Scepticism grows over the viability of green
projects
Robin Pagnamenta, Energy and Environment Editor
Speaking on the sidelines of the World Economic Forum, Lord
Turner, chairman of the Financial Services Authority
(FSA) and of the Government’s Committee on Climate
Change, said that the study was a response to mounting
scepticism over the Government’s plans for a huge
expansion of wind and tidal power.
The Times
March 26, 2009
When oil, coal and gas are cheap, who is going
to throw their cash into the wind?
Robin Pagnamenta, Energy and Environment Editor
The credit crunch has undermined developers’ ability to borrow
to fund big wind and solar power schemes, while tumbling
prices for conventional fuels like oil, coal and gas have
undermined the economics of the renewables industry.
“Are we able to worry about more
than one concern at a time”.
The Guardian,
Thursday 12 February 2009
Britain should prepare for massive loss of
landmass, warn engineers
Can or does the country
continue to think about the
environment and
environmental issues while
the immediate economic
situation looms large.
UK should change building design, transport and
energy infrastructure ahead of climate change
and high sea levels
Terry Macalister
The climate change movement must be
inclusive
The climate change movement must broaden its
social base from the white middle-classes to
include the poor and ethnic minorities if it is to
be successful in protecting the environment
For weeks now the world has been mesmerised by
the "credit crunch". But the biggest single longterm threat to all our futures remains the issue
of climate change.
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Man’s effect or natural fluctuations.
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Temperatures set to rise.
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Climate change is casting its influence over
the construction industry.
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Sea level changes
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Weather conditions
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What does this have to do with the building
regulations.
The story so far.
Building Regulations.
Health and safety in use.
1985 regulations – conservation of
fuel and power.
by 1995
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In 2002 changes add a requirement for
information on boilers and there operation.
(d) providing sufficient information with the heating and hot water
services so that building occupiers can operate and maintain the
services in such a manner as to use no more energy than is
reasonable in the circumstances.
Also at this stage control of replacement
services and fittings was included.
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2006 edition the options
were limited, removing
the elemental
approach.
CO2 became the prime
measure.
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Checklist for dwellings.
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5 Criteria.
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As built information.
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Other parts of the regulations.
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Approved document F.
Guidance notice-air permeability
Approved document H.
Section H3-surface water disposal
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Changes to come
Approved document G – Use of water.
Approved document L – changes to align more
closely with the code for sustainably homes.
Approved document F – ventilation details.
Approved document C – flood resilience.
What have we seen so far.
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I have a ‘Green design’ because I met the
requirements of the building regulations.
SAP calculations added at the end, not used
as part of the design tools.
Adjustment of the design to just meet the
minimum requirement.
Use of loopholes to justify design.
Removal of elements of the design.
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The use of high permeability figures in the
DER/TER design.
Better by design.
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By linking the building regulations with the
code for sustainable homes, using other
guidance and manufactures design
information, sustainable elements can be
built in to your buildings that satisfies your
clients needs the site limitations and the
regulatory requirements.
Future proofing.
Better by design.
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Orientation
Natural and designed shading.
Rainwater harvesting.
Gray water capture.
Foundation design.
Flood protection.
Whole life design.
How you can use the regulations.
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The regulations are not must does, they
contain options.
Remember that they are only the minimum
standard to be achieved.
Read the guidance notes the help to link the
approved documents together.
In conclusion
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Government response to Climate change is
putting pressure on the construction industry.
Changing emphasis of the building
regulations.
Site specific design can help meet the
regulations and code requirements.
Use the code as part of your design tools.
Adaptation and whole life design.
Other sources of information.
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Climate change
www.realclimate.org.uk
www.metoffice.org.uk
Energy efficiency
www.energysavingstrust.org.uk
www.warmfrongrants.co.uk
Renewable energy
www.nef.org.uk
www.lowcarbonbuildingsprogramme.org.uk
 Water use
www.environment-agency.org.uk
www.waterwise.org.uk
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Waste minimisation
www.wrap.org
 Businesses
www.carbontrust.co.uk
www.envirowise.gov.uk
www.environment-agency.gov.uk
www.businesslink.gov.uk/southeast
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Adaptation
www.ukcip.org.uk
www.climatesoutheast.org.uk
Thank you
The End
Rainwater Harvesting
Phil Bradbury
South East Area Representative
WPL Ltd
working with you to build a safer, sustainable Sussex
Rainwater Harvesting
Presented by
Phil Bradbury
Environmental Wastewater Solutions
Introduction to WPL Limited
• WPL Ltd provide innovative and reliable wastewater treatment, rainwater
harvesting and grease management systems for domestic, commercial
and industrial markets
• Manufactures and Distributors of waste water treatment plants for the
Domestic and Commercial & Industrial markets
• Distributors/Resellers of Domestic and Commercial Rainwater Harvesting
Systems
• Framework supplier to most UK water utilities
• Over 25 years experience in Water & Waste Water Treatment
Environmental Wastewater Solutions
Learning Objectives
• Understand what rainwater harvesting is
• Why use rainwater harvesting
• Design considerations
• What is available
• Installation
• Features & Benefits
• Cost
• Conclusion
Environmental Wastewater Solutions
What is rainwater harvesting?
• Upto 50% of mains water that is currently used can be safely replaced with rainwater
without any inconvenience to the customer.
• Properly designed rainwater harvesting systems are designed to provide sufficient water for
a property to have 21 days water storage capacity and this reduces the potable water
consumption to be significantly less than 80 litres per person per day thereby enabling an
immediate 6 star rating within the Codes Water Category.
• Can be fitted in new and existing properties
• The collection of water for re-use from a roof or hard standing area.
Uses:
• Toilet Flushing
• Cleaning
• Car Wash
• Washing Machines
• Garden
Environmental Wastewater Solutions
Why choose rainwater harvesting?
Using rainwater harvesting for domestic and commercial buildings:
As a result of the growing population water reserves are declining.
The code for sustainable homes uses a ‘star’ system to demonstrate the overall sustainability of a home. A growing number of
planners and developers’ customers are already asking for the design and construction to be at a 5 or 6 star rating.
Key Benefits:
Helps alleviate flood risks by collecting excess water. Due to erratic weather systems we either have an abundance or
drought. Rainwater Harvesting is the only sustainable drainage system that removes the initial impact of storm water from the
site. Any Development with over 10 houses must undertake a flood assessment.
The E.A. accept rainwater harvesting as an appropriate form of surface water attenuation.
Provides a source of usable water during periods of low rain fall.
One of the easiest and inexpensive ways to achieve cost savings on water bill. Legislation bought in by the government in
2006 gave water companies the right to compulsorily meter all it’s customers, currently about 40% of the population have
meters, but this will increase over time. The legislation aims at 90% within 10 years.
Adds sustainable value to a property.
Regulations
SUstainable Drainage Systems
Part H Drainage and Waste Disposal
Part L Sustainable rainwater drainage
The Building Act & Regulations
H3 Rainwater Drainage
Environmental Wastewater Solutions
The Code for Sustainable Homes - Category 2: Water
Over a number of years the Code for Sustainable Homes is introducing water reductions on a phased basis
between public and private housing.
The code aims:
“ TO REDUCE THE CONSUMPTION OF POTABLE WATER IN THE HOME FROM ALL SOURCES,
INCLUDING BORE HOLE WELL WATER, THROUGH THE USE OF WATER EFFICIENT FITTINGS,
APPLIANCES AND WATER RECYCLING SYSTEMS”
The use of dual flush toilets, aerated taps etc are commonplace within the code to achieve the lower code
levels 1 & 2.
Code levels 3 & 4 are already in place for public housing, and will be introduced to the private sector by
2010. To achieve this level you need smaller baths as well as the previous methods above, however these
methods may prove to be unpopular to the house holder, primarily comfort and convenience.
Rainwater harvesting is the most cost effective and practical way to achieve the code levels 5 & 6, which
will be mandatory by 2013 for the Public sector and 2016 for the private sector.
Code for Sustainable Homes Weightings:
The weighting factor to percentage points contribution for the water category is 9%. With 6 credits available
in the category, the weighted value of each credit is 1.50 – the highest of any category within the code.
Environmental Wastewater Solutions
Design Considerations
Annual Precipitation over
Great Britain
Environmental Wastewater Solutions
Design Considerations
Tank size calculations
E.A. recommend 5% of rainwater supply or of annual demand,
using the lower of the two figures
Environmental Wastewater Solutions
Design
• 150 lts per person per day - 50% could be rainwater harvested
• A house with 4 persons could save around 100m3 per year
Variations
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Header Tank
Cistern Top Up
Dual-feed WC system
Tank top up from mains
Auto change over to mains
Environmental Wastewater Solutions
What's Available
Above Ground
Water butts
Sectional
Industrial/Commercial
Garden Systems
Below Ground
High water table
Home & Garden Systems
Garden Systems
Industrial/Commercial
Environmental Wastewater Solutions
Filter
AA Air Gap
Soakaway
Pump and Control
Suction Filter
Calming Inlet
Environmental Wastewater Solutions
Installation Considerations
Plumbing Legislation
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Type AA or AB Air gap
WRAS dictates that pipes carrying non-potable water must be clearly marked
WRAS recommend
– Hazard assessments
– Prevention of cross contamination
– Screened Inlets
– Insulation to minimise frost damage
Maintenance
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Whilst filters are self cleaning, inspection 3 times per year is recommended
Gutters need to be kept free of debris
A visual inspection of the tank is required once a year
Control systems should be checked once a year
Environmental Wastewater Solutions
Water Quality
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No water quality standards exist for Rainwater Harvesting
Studies done suggest the following as standards
– Vehicle washing <10 total coliforms
– Irrigation <1,000 total coliforms
– WC Flushing <1,000 total coliforms
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In microbiological tests, Harvested Rainwater had less than 10% of the above as total coliforms cfu/100ml
Sources Of Contamination
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Asbestos – cement roofs
Metal roofs can taint the water with leachates
Bitumen or felt can cause odour
Grass or other vegetation may cause soil and colour problems
When not to use
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Do not collect from hard standing, animal contamination as well as oils from cars
Should not be used for drinking or ingestion with out further treatment
Environmental Wastewater Solutions
Benefits
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Other than filtering no further treatment required
Compliance with building regulations
Reduced loading on sewers
Reduced water bills
End User Perceptions
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The cost of systems are prohibitively expensive
Concerns over water quality and health risks
Costs
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The costs for systems vary but for a basic system they start at £1,500 up to £3,500.
Installation costs vary from £300 up to £1,500
Environmental Wastewater Solutions
Conclusions
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Relatively cheap attenuation for sites
Customers will see a payback if on water meters
Supply of water for the garden during hose pipe bans
Ease of installation on new builds, more difficult on retrofits
Compliance with new regulations and guide lines
Sources Of Information
•
WRAS
• Water Regulatory Advisory Scheme
• Web site – www.wras.co.uk
– Specification for backflow prevention
•
Environment Agency
• Web site – www.environment-agency.gov.uk
• Phone – 08708 506506
Environmental Wastewater Solutions
Questions for the panel
working with you to build a safer, sustainable Sussex
Summary
Ray Lee
working with you to build a safer, sustainable Sussex
Lunch
working with you to build a safer, sustainable Sussex