With a partial reclad, the new work must be able to be merged with the existing without compromising the performance of either.
While there should be a defined cladding junction to start and stop the repair, the difficulty is detailing how flashings can be inserted behind an existing cladding that is not being modified – one option is to incorporate a cover flashing into the junction detail.
Where a targeted repair of EIFS or stucco is considered appropriate, the replacement cladding must be merged with the existing without compromising the performance of either.
To do this:
- form movement control joints by saw cutting the existing cladding at the outer limit of the area to be removed, preferably up the line of a stud
- remove the backing
- replace affected timber framing
- install new backing
- insert removable filler along line of joint
- seal movement control joints with sealant over backing rod.
It is common for buildings on sloping sites to have situations such as basement walls continuous with adjacent retaining walls.
This can create a situation where it is almost impossible to ensure continuity of waterproofing at the junction of the two construction types.
Updated: 9 September 2014