Barry McCarron, Chairman of the Passive House Association of Ireland, chats about doing up his family to make it energy efficient, including:* Going from a bungalow to an A rated home * Cost details and how it compared to building new * What is the fabric first approach * What are the main types of insulation? Where are each best used? * How much insulation is enough: cost optimal amount to install * Why is airtightness important? * How to install insulation and airtightness correctly * The benefits of following a set standard like the passive house standard * What the future of house building and retrofitting looks like

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