Dusty Gedge, founder of Livingroofs.org, explains the benefits of installing a green roof, how it can be simple and why lots of people get swayed by commercial systems.

Graham Hunter from Parity Projects explains how data collected from one of their energy assessments is then turned into a report of options for the homeowner. This follows on from episode 60 which trailed Graham as he conducted an assessment.

Stephen Gurney from Ecological Building Systems explains the main causes of poor airtightness test results.

Alan Budden from Eco Design Consultants explains how simple design decisions can drastically alter the energy performance of a house and why this means your designer needs to be using a tool like the Passive House Planning Package (PHPP) to better inform these decisions.