One of the most technically challenging additions to date, this attic renovation with the addition of 3 dormers involved constructing a set of full 3-storey high temporary access stairs, the installation of massive timber structural reinforcing members, and beautiful, historically appropriate interior finishing. Fully reinforcing the floor, adding hew high performance insulation and air sealing and a state of the art heat pump heating and cooling system with heat recovery ventilation system (HRV) will ensure that this third story is comfortable and functional for many decades to come.