University of Sussex

Location: Sussex

Client: University of Sussex

Introduction

During routine façade maintenance at Sussex University, a 12 year old insulated glass unit became detached from the curtain wall system. Instead of undertaking a full replacement immediately, we were brought in to design and install a rapid retrofit solution that would reliably secure the existing glazing panels in place.

Client background

Sussex University’s teaching and administrative buildings boast large curtain wall façades that flood interiors with natural light. Installed in 2013, the insulated glass units have performed reliably, but over time small defects and material fatigue can appear, affecting both their look and safety. The University needed a way to maintain the façades appearance while ensuring they met all health and safety requirements.

The challenge

A site inspection revealed that the edges of several glass panels had not been correctly cut or hardened, a defect that increases the likelihood of spontaneous detachment. The fallen unit had shattered on the ground below, demonstrating the potential for serious harm. As a full refurbishment wasn’t practical at that time, our assignment was to develop a streamlined retrofit solution that would strengthen the existing glazing swiftly, securely, and within the project’s scope.

Solution concept

Following thorough inspections, the team designed a retention system using pressure plates and silicone sealed caps. They bolted the plates directly onto the existing curtain wall frame and applied a continuous silicone seal between cap and glass. This method kept each pane firmly in place, maintained weather protection, and preserved thermal performance, without ever removing the panels.

Implementation

Over the course of a week, scaffolding was erected to access every affected section of the façades safely. To prevent any panel movement, installers first set up temporary supports beneath each glass unit. They then secured the aluminium pressure plates by bolting them evenly across each pane. Once all plates were in place, a continuous bead of silicone was applied behind the capping to seal any minor gaps. Throughout the project, the team remained in close contact with Sussex University’s staff, ensuring that footpaths stayed open and work adhered strictly to safety regulations.

Results

Upon completion, the bespoke retention system immediately restored the integrity of the curtain wall eliminating any risk of further detachment. By retrofitting the existing glass in place, the university avoided a full system replacement and associated capital outlay, while maintaining both the appearance and performance of the façades.