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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