Sirius

Sirius Building Redevelopment: A Brutalist Icon Reimagined with Modern Luxury and Longevity

The redevelopment of the iconic Sirius building, located in the heart of The Rocks in Sydney, involved a thoughtful reimagining and expansion of the original floor plan to create a collection of luxury apartments. This project is a prime example of adaptive reuse, maintaining the essence of the building’s brutalist architecture while infusing it with contemporary design.

Given its location by Sydney Harbour and the exposure to harsh weather and saltwater, the protection of the building’s concrete structure was paramount. Penetron Admix was selected as the superior solution for this critical aspect of the project.

The Penetron Admix waterproofing admixture was chosen for the most high-risk areas of the new concrete placement, including the podium slab, retaining walls, and pool areas. This admixture extends the service life of the concrete by up to 60 years by significantly reducing permeability, thereby offering long-term protection from water penetration and deterioration.

When added to the concrete mix, PENETRON ADMIX permanently seals micro-cracks, pores, and capillaries, protecting the concrete even under high hydrostatic pressure. Now in its third generation, PENETRON ADMIX continues to lead the industry with its unmatched performance, without affecting the concrete’s strength, slump, or setting time.

The redevelopment is a collaboration between builder Richard Crookes Construction, SCP Engineers, BVN Architecture, and Boral (Concrete Supplier), all working together to preserve and enhance this architectural landmark.