We re-run an interview from 2014 with Stephen Gurney, who explains what causes poor airtightness test results and how they could have been avoided.

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We re-run an interview from 2013 with Sarah Susanka, author of the Not So Big House.

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We re-run an interview from 2012 with the co-founder of the Passivhaus standard, Dr Wolfgang Feist.

Mike Coe and his partner Lizzie created one of the UK's most energy efficient homes. Now they're looking to sell and start a new project elsewhere, they're finding that they will have made a loss. Mike discusses why that might be, and whether it will change the way he thinks about his next self build.

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We are currently following the progress of Buckinghamshire Passivhaus with video updates in The Hub. In order to provide some background to the project, we spoke to its architect, Janet Cotterell, about the reasons behind her clients decision to completely rebuild the house, rather than follow their original plans of refurbishing it to Passivhaus standard.

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We have been following Alex Baines' Long Barrow Passivhaus self build project in previous podcast and Hub episodes. This time we catch up with him to use his experience of working in the renewables industry, together with his current role as a Passivhaus consultant, to understand how renewables and a fabric first approach can be balanced when building your own energy efficient house.

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Until fairly recently Paul Buckingham was carrying out airtightness tests on volume built houses. He explains how his role was to make the house pass the test, not about making the house energy efficient.

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Dean Scott and his wife Hannah have never found anywhere they liked enough to buy and have long had a dream to self build instead. With the release of plots at the Graven Hill development in Oxfordshire, they are now looking to start the process and get building!

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As part of Ben Adam-Smith's video work, podcasts and meeting with other self builders, he is often asked questions about the Passivhaus standard that he doesn't know how to answer. He recently took the opportunity to put those questions to Elrond Burrell, as well as finding out about Elrond's future plans as he gets ready to move back to New Zealand.

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It can be difficult to know who to approach at your local authority, other than the planning department, if you're looking to self build. And if you get a knockback where do you take it from there? Emma Osmundsen from Exeter City Council explains who you should be talking to and how working co-operatively and collaboratively could help with your plans to self build.

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