A retro-fit offers many benefits: cutting electricity and heating bills, increasing the resale value of homes, slashing carbon emissions and creating a healthier place to live. This book is the guide to making it happen. It looks at: - draught-proofing, insulation and damp - ventilation, heating and cooling - electrical efficiency and renewable energy - water use and re-use - materials' life cycles and incorporating nature - protection from climate change impacts - modelling energy flows and embodied energy - how we can meet the need to cut carbon emissions from dwellings by 80% by 2050. Projects can apply to apartment blocks, recent builds and older, solid-walled properties. Enlivened with helpful diagrams and photographs, plus plenty of pointers for further information, it provides a comprehensive resource handbook for any building professional and contractor, students - or any homeowner serious about efficiency (cash and carbon) savings.