What we did:

• Balcony & terrace waterproofing

• Bathroom re-waterproofing

• Make of internal finishes and flooring

• Window and door replacement

• Masonry and cavity flashing repairs

• Roof flashing repairs

89-91 BOYCE RD, a multi-unit property situated at Maroubra Junction, was an HBCF insurance claim project completed for Vero Insurance, managed by Lend Lease.

It is a reinforced concrete frame, brick clad 9 storey residential tower over an underground reinforced concrete car park, with a mixed construction roof being one part waterproofed and tiled concrete terrace with landscaped planter boxes, the other part being sheet metal roofing with box gutters behind a parapet wall.

The building was leaking in several areas requiring the upper floor to have a perimeter brick cavity flashing replaced, upper floor balconies pared back to structure then re-built using better applied liquid waterproofing, cavity flashing replacement and the correct water-stop installed behind the sliding doors.

On the tiled rooftop section we stripped back to its structure and removed the planter boxes. This revealed significant movement occurring between the concrete slab and the parapet wall, so the existing liquid waterproofing membrane was replaced with a sheet membrane to accommodate extra movement. The terrace was also rebuilt with better falls to direct rainfall to outlets and we added over flashing for the parapet wall. Similarly we rectified the sheet metal roof box gutters insufficient laps and falls to the outlets.

The existing Ritek formwork walls comprising part of the frame was found to be corroding due to the original builder’s application of an internal mortar finish rather than external, which allowed moisture in and corroded the metal studs within the system. MAX Build removed all affected areas, and replaced with concrete repair mortar, applied an acrylic render finish to replace the FC sheets and finished with an elastomeric paint system.