From The Building Centre and The Concrete Centre Jake Edgley of Edgley Design shares insight on Pear Tree House in Dulwich. This backyard house is wedged between terraced houses. The ground floor walls are cast in concrete with vertical timber boards. To offset the matte concrete finishes of the walls, a polished concrete floor was installed throughout the ground floor. The concrete external walls were cast in-situ, with two leaves either side of the insulation.