Woollhara - Façade Waterproofing and Flashing Remediation

Comprehensive façade remediation works were undertaken to rectify persistent water ingress associated with failed flashing systems and deteriorated window interfaces within a multi-residential strata building.

The scope centred on the strategic replacement and installation of compliant head, sill and cavity flashing systems to reinstate the integrity of the building envelope. Existing defective sealants and compromised flashing details were carefully removed, with masonry interfaces selectively opened where required to introduce new concealed flashings. Head flashings were installed with appropriate upturns to prevent moisture tracking into wall cavities, while sill flashings were reformed and detailed to ensure positive drainage and correct discharge to the façade face.

Cavity flashings were integrated within the wall system to interrupt moisture migration pathways and redirect incidental water externally via compliant weephole detailing. Particular attention was given to termination points, laps, and membrane interfaces to ensure continuity of the waterproofing strategy across all junctions.

Window perimeters were fully prepared and resealed using high-performance elastomeric façade sealants, designed to accommodate structural movement and long-term environmental exposure. Substrates were mechanically cleaned and primed where required to achieve optimal adhesion and durability.

All works were delivered in accordance with the consultant’s specification and current NCC requirements, with rigorous quality control procedures implemented throughout. Given the occupied nature of the building, works were carefully staged to maintain resident access while ensuring safe and controlled site conditions.

The completed remediation reinstated the building envelope’s weatherproof integrity, significantly reducing ongoing ingress risk and extending the long-term serviceability of the façade system