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CRACKING THE CODE

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CRACKING THE CODE ...

CRACKING THE CODE

HOW TO ACHIEVE CODE LEVEL THREE AND

ABOVE

CRACKING THE CODE:

How to Achieve Code Level Three and Above

    Written by Andrew Eagles, Clare Wilson,Will Johnson, Khalilur Rahman and Barry Smith (Sustainable Homes), and Matthew Davies (RSK Carter Ecological Ltd) April 2008.

Supported by the Housing Corporation‘s Innovation & Good Practice

    Programme.

ACKNOWLEDGEMENTS

Sustainable Homes would like to thank:

    The organisations that kindly provided case studies for inclusion in this guide:

English Partnerships

    ecoTech

    Greenoak Housing Association

    Kingspan Offsite

    Osborne

    Stewart Milne Group

    Zed Factory

    Hastoe Housing Association

    Hastoe Housing Association set up Sustainable Homes in 1996, becoming Sustainable Homes Ltd in 2007.The team provides training and consultancy services on improving sustainability and environmental performance to anyone involved in the housing sector.

    Please note that information and opinions have been gathered together in this document to give general guidance on the Code for Sustainable Homes. They are believed to be correct but Sustainable Homes, Hastoe Housing Association,

    the Housing Corporation and the other organisations participating in the project cannot accept any liability arising from them. Housing associations and others will need to obtain their own professional advice when implementing schemes or contemplating new arrangements.

    Photos courtesy of:

ecoTech

    Greenoak Housing Association

    Kingspan Offsite

    Osborne

    Stewart Milne Group

    Zed Factory

Printed on 100% recycled paper

FOREWORD

    The Housing Corporation has long been committed to sustainability and is steadfast in ensuring that the homes it funds are built with minimum impacts on the environment, and contribute fully to the well being of current and future communities. It is with this in mind that the Corporation welcomed the launch of the Code for Sustainable Homes in December 2006, as the new

    environmental standard for newbuild homes. The Code provides a clear signpost of the route towards low and zero carbon homes, and is part of a suite of measures to achieve the Government's target of all new homes being zero carbon by 2016.

    In supporting the Government in this aim, the Corporation has adopted Code level three as a minimum standard for the 2008 - 11 National Affordable Housing Programme, requiring it on more than 40,000 homes that it will fund annually from 2008.

    As with the adoption of the EcoHomes environmental standard in 2003, the Housing Corporation is proud to continue to lead the way in sustainable design and build. However, it is recognised that the move from EcoHomes to Code level three will be demanding, especially with the introduction of new minimum standards for energy and water. In addition the new standard will need to be delivered in a climate of increased cost efficiency.

    In order to assist the sector in meeting the challenges posed, the Corporation has commissioned Sustainable Homes to develop this best practice guide on the Code for Sustainable Homes. The guide aims to be a useful resource for social landlords in meeting Code level three and beyond, acting as a companion guide to the formal Code Technical Guidance. The guide explores the rationale, structure and coverage of the Code in a user friendly way, focusing on key issues for compliance. It also provides a series of exemplars of schemes already accredited against the Code, or incorporating Code equivalent standards. These include the first homes to achieve Code levels five and six.

    We hope that this guide provides valuable support to those involved in making the Code a reality.

Richard Hill

    Director of Investment

    The Housing Corporation

Cracking the Code - How to Achieve Code Level Three

and Above

020 8973 0429 ll info@sustainablehomes.co.uk ll Page 4

CONTENTS

    ACKNOWLEDGEMENTS 2

FOREWORD 4

    EXECUTIVE SUMMARY 11

CHAPTER ONE:

Introduction and Background

    Introduction 14 What is the Code for Sustainable Homes? 14 Why is the Code Important? 14 Who Needs to Meet the Standard? 15 The Private Sector 16 What About EcoHomes? 17

CHAPTER TWO:

    The Code for Sustainable Homes - An Overview

    Structure and Issues Covered 18 Minimum Standards 19 Main Differences to EcoHomes 20 Assessment Process 21 Code Dwelling Types 22 Design Stage Assessment 23 Post Construction Review (PCR) 23

CHAPTER THREE:

The Code Issues in Detail

CATEGORY 1 ENERGY

    Structure of Code Energy Requirements 25

    Summary of changes compared to EcoHomes 2006 25

    Ene 1 - Dwelling Emission Rate 27 Ene 2 - Building Fabric 35 Ene 7 - Low Zero Carbon Technologies 35

    Cost Analysis 35

CATEGORY 2 - WATER

    Summary of changes compared to EcoHomes 2006 38

    Wat 1 - Internal Water Use 39 Cost of Recycling Systems 43 Example Products 44 Case Studies 46 Cost Analysis 47

CATEGORY 3 - MATERIALS

    Summary of changes compared to EcoHomes 2006 49

    Mat 1 - Environmental Impact of Materials 51 Mat 2 - Responsible Sourcing of Materials 52

    Case Study 52 Cost Analysis 53

CATEGORY 4 - SURFACE WATER RUN-OFF

    Summary of changes compared to EcoHomes 2006 53

    Cost Analysis 53

CATEGORY 5 - WASTE

    Summary of changes compared to EcoHomes 2006 58

    Was 1 - Household Waste Storage and Recycling 59

    Facilities

    Was 2 - Construction Site Waste Management 60

    Case Studies 62 Was 3 Composting 64

    Cost Analysis 66

CATEGORY 6 - POLLUTION

    Summary of changes compared to EcoHomes 2006 68

CATEGORY 7 - HEALTH AND WELL BEING

Summary of changes compared to EcoHomes 2006 68

    Hea 2 - Sound Insulation 69 Hea 4 - Lifetime Homes 72 Checklist 72 Cost Analysis 76

CATEGORY 8 - MANAGEMENT

    Summary of changes compared to EcoHomes 2006 77

    Man 1 - Home User Guide 79 Man 2 - Considerate Constructors Scheme 79

    Man 3 - Construction Site Impacts 80 Man 4 - Security 80

CATEGORY 9 - ECOLOGY

    Summary of changes compared to EcoHomes 2006 81

    Eco 1 - Ecological Value of Site 85 Eco 2 - Ecological Enhancement 85 Eco 3 - Protection of Ecological Features 85

    Eco 4 - Change of Ecological Value of Site 86

    Eco 5 - Building Footprint 86 Case Study 87 Cost Analysis 87

CHAPTER FOUR:

    Other Issues for Consideration

    Residents 88 Capital Costs 88 The Future 91

CHAPTER FIVE:

    Recommendations 92

    CHAPTER SIX Sources of Further Help

Sustainable Homes 94

    Code for Sustainable Homes awareness training 94

    Code for Sustainable Homes Assessor training 94

    BRE 95

    Energy Saving Trust 95

    CHAPTER SEVEN: Case Studies

Currently under development

    English Partnerships Carbon Challenge 96 Hanham Hall, South Gloucestershire 96

Pre-April 2007 Schemes

BowZED, Bow Road, East London 98

    Glazier's Lane, Guildford and Dartmouth 99

    Avenue,Woking

Post-April 2007

BRE Innovation Park 105

    The Osborne Demonstration House 105

    Organics by eco-TECH Swedish House 108

    The Sigma Home by Stewart Milne Group 111

    The Lighthouse Net-Zero Carbon Home 116

Glossary 121

    Training Dates 125

Training Booking Form 129

Cracking the Code - How to Achieve Code Level Three and

Above

020 8973 0429 ll info@sustainablehomes.co.uk ll Page 9

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