Work undertaken can improve a building's performance or appearance beyond what is required to address its weathertightness issues.
Improvement options include opportunities to lower the building’s weathertightness risk beyond that required for remediation, remedy defects (other than weathertightness) in the original building, change the building’s appearance to improve its market value, improve the level of amenity (for example, adding a room or ensuite, remodelling a bathroom or kitchen) and improve sustainability.
In general, these options will need to be costed as a separate exercise as they are considered additional to the work needed to make the building weathertight.
However, for some remediation projects, the remediation work will trigger a need to upgrade some other aspect of building performance, which must then be included as a direct remediation cost.
For example, if direct-fixed EIFS cladding is replaced by EIFS or another cladding installed on a cavity, the contribution of the cladding to thermal performance is reduced, so the insulation within the framing must be upgraded to compensate.
Similarly, where the original direct-fixed cladding provided structural bracing, it may be necessary to compensate for this when new cladding is fixed over a drained and vented cavity or the cavity battens need to be fixed to the framing as a structural element.
Updated: 9 September 2014