Exterior, House Building Type, and Metal Roof Material Large gum trees offer a natural barrier for the house. Harkness designed the house's footprint in order to minimize the effect on tree roots. “The retained trees offer a sense of layering and age that new vegetation won’t be able to for a long time,” Harkness says.  Search "glass house australia’s sunshine coast" from A Breezy Modern Beach House Sits Among the Trees in Australia