We are the Passivhaus Designer for the third phase of the Agar Grove estate regeneration project, working for Camden and also the contractor Hill Partnerships. We have been working alongside Max Fordham who as Passivhaus Consultant is responsible for the PHPP planning tool, thermal bridge modelling and liaison with the Passivhaus certifier, regarding documentation and evidencing.
We have detailed the external envelope without contractor design portion, initially focused on window brackets as the largest unknown thermal bridge, and developed details that ensured balustrades and window reveals could be supported by either brickwork and their support angles, or in some instances, thermally broken structure. Air tightness at a block level has been simplified by creating air tight party walls – redundant once complete – but key to enable more efficient testing. At a detail level the geometry and number of multiple tapes used on individual junctions has been significantly simplified from previous phases.