Inspired by 1920s art deco design, with sculpted curves and grand proportions, this is a building that has reset the benchmark for the premier Sydney harbourside suburb, Double Bay

Double Bay residents are used to the best. The best shopping, the best dining, and footsteps away from what can arguably be described as one of the best harbours in the world.

Completed in December 2020, the luxury development by SJD was designed by celebrated Australian architecture firm Bates Smart and set new price records for the suburb when it commenced selling off the plan in 2017.

“It’s a great location,” agrees Adrian Sicari, managing director of Ultra Building Co. “They can walk to the shops, to the beach, to the ferry, it’s very close to the city.”

Sicari’s team were the builders behind 1788 and says no expense was spared in bringing Bates Smart’s vision to life. Inspired by the jewellery design, industrial design and fashion of the 1920s, 30s and 40s, he describes the overall feel as one of “modern grandeur”.

“You’re talking about high-class, high-detail, high-finish, luxury apartments,” he says. “All the detailing, construction and behind-the-scenes of how the apartment building operates is industry-leading.”

Classic slimline Spanish bricks were used on the exterior, while the large apartments feature marble, timber veneer, ornate metalwork and high-end appliances. A finished basement provides a secure place for residents to park their luxury vehicles.

And this basement is where Penetron first became involved in this project. As far back as the early works, as the CSM wall was created to keep moisture away from this water charged site, 9m below ground level. Penetron products were used by civil contractor SGE. PENEPLUG, WATERPLUG and PENETRON were used to keep water ingress at bay.

In the fully tanked basement, PENETRON ADMIX was used in the 800m3+ hydrostatic slab. PENETRON ADMIX was then used in the shotcrete in conjunction with Penebar SW55 Type B, to provide an extra layer of protection against potential water ingress.

PENETRON ADMIX was again used to provide extensive protection and durability to the concrete roof slab. PENECRETE MORTAR and PENETRON VO PATCH was used to make good minor honeycombing in concrete elements throughout.

David Chandler OAM, the Building Commissioner & his Team inspected Project, especially the basement built 9m under the water table.


Client: SJD Group Australia
Builder/Developer: Ultra Building Co
Architect: Bates Smart
Concrete Supplier: Hanson
Shoring: Sand Ground Engineering

Areas Treated: Basement slabs, lift pits, OSD tanks, shotcrete walls, all construction joints, exposed podiums, roof slabs.
Request the Master Penetron Specifications for examples of how to waterproof different areas of your building.


Products Used