Oak trees are a precious but delicate feature of southern landscapes: their shallow roots extend far from their bases and are vulnerable to light foot traffic and certainly building foundations. +one design & construction used a “coil pile” foundation system, essentially of corkscrew-like supports, that allows the guest room to harmlessly float over the roots of this 80-year old tree.  A Renovation Reconnects a House to its Louisiana Landscape by Zachary Edelson