Kevin revisits Andrew and Lowri Davies who embarked on a project to build an environmentally friendly farmhouse in rural Wales. Encouraged by their architect, they opt for some state-of-the-art experimental building materials; but do their builders know how to use them?
As the budget spirals out of control, they find it increasingly difficult to balance the budget with their desire for a sustainable home.
click here to see where to watch or .
Ready to Watch Grand Designs, Season 5, Episode 8?