The development replaces the existing rear wing of the house with a new structure which simulates the form and mass of the previous construction. Whilst the pre-existing form and mass are retained and taken as cues for the new structure, the materiality is reinterpreted as a skin which wraps and contains the new space. The skin rejects the use of a ‘corner’ which defines the demarcation between wall and ceiling, here, both become the one treatment, the one surface, the one space. The familiar material of corrugated iron is chosen as the appropriate treatment for the skin, responding to the industrial context the house shares and as a reference to the previous structure on the site.