Sydney Grammar School, Sydney

Project Overview

RJC Group delivered remedial stonemasonry works to the Hallen Building at Sydney Grammar School, a significant heritage structure within one of Sydney’s most respected educational institutions. The project focused on repairing deteriorated sandstone elements and associated heritage details to preserve the building’s architectural character and support the long-term performance of its heritage fabric.

Provision of scaffolding and hoarding to support safe access and site management
Replacement, dismantling and reuse of sandstone elements
Indent repairs, mortar repairs, repointing, pinning and crack repairs to sandstone
Cleaning, redressing and desalination of sandstone surfaces
Removal of redundant fixings and installation of new lead weatherings
Making good existing copper flashings and painting timber window frames

Delivering remedial works within an operational school environment while maintaining safety for staff and students
Matching repairs and replacement elements precisely to the existing heritage sandstone
Coordinating access and scaffolding within a restricted school setting
Managing a remedial scope spanning stone, flashings and associated heritage elements

RJC Group planned the works to suit the conditions of a live educational environment, with each repair methodology selected to address deterioration while maintaining consistency with the building’s original materials and detailing.

The scope combined stone repair, selective replacement and associated remedial works, requiring careful coordination across heritage treatment, material compatibility and site access. All works were carried out with a focus on safety, precision and long-term durability.

Deteriorated sandstone elements repaired, stabilised and selectively replaced
Heritage character preserved through careful material matching and sympathetic repair methods
Associated remedial works completed across flashings, fixings and timber window frames
Works delivered safely within an active school environment
Long-term durability and performance of the Hallen Building’s heritage fabric improved

Scope of Works

Provision of scaffolding and hoarding to support safe access and site management
Replacement, dismantling and reuse of sandstone elements
Indent repairs, mortar repairs, repointing, pinning and crack repairs to sandstone
Cleaning, redressing and desalination of sandstone surfaces
Removal of redundant fixings and installation of new lead weatherings
Making good existing copper flashings and painting timber window frames

Project Considerations

Delivering remedial works within an operational school environment while maintaining safety for staff and students
Matching repairs and replacement elements precisely to the existing heritage sandstone
Coordinating access and scaffolding within a restricted school setting
Managing a remedial scope spanning stone, flashings and associated heritage elements

Delivery & Approach

RJC Group planned the works to suit the conditions of a live educational environment, with each repair methodology selected to address deterioration while maintaining consistency with the building’s original materials and detailing.

The scope combined stone repair, selective replacement and associated remedial works, requiring careful coordination across heritage treatment, material compatibility and site access. All works were carried out with a focus on safety, precision and long-term durability.

Key Outcomes

Deteriorated sandstone elements repaired, stabilised and selectively replaced
Heritage character preserved through careful material matching and sympathetic repair methods
Associated remedial works completed across flashings, fixings and timber window frames
Works delivered safely within an active school environment
Long-term durability and performance of the Hallen Building’s heritage fabric improved