The Issue / Problem

We were appointed to deliver a programme of up to 13 bonded double-glazed unit (DGU) replacements at a live, high-profile central London site.

The damaged glazing was located across multiple elevations, each requiring a tailored access solution. A combination of rope access, bespoke scaffolding, MEWPs, spider cranes and specialist glass lifting equipment was needed to complete the works safely.

All units were bonded, meaning each replacement followed a two-stage process: safe removal, temporary weatherproofing, off-site re-bonding and final reinstatement.

Weekend-only access restrictions, a busy city-centre location and limited as-built information added further complexity, requiring detailed investigation and flexible programming.

New Street Square, London

The Outcome

All 13 bonded glazing units were replaced within programme.

Positive feedback was received from the site team. Despite weekend-only access and varied constraints, the works were delivered safely, efficiently, and without disruption to operations.

The project demonstrates our ability to deliver complex glazing replacement works in live commercial environments through technical expertise and flexible planning.

Our Solution

We developed a collaborative, flexible delivery strategy designed around access constraints and operational limitations, including:

  • Close coordination with the site team both in person and online to maintain strong communication throughout

  • Structural assessment and glass specification confirmation prior to replacement

  • Development of alternative access methodologies where crane access was not viable

  • Installation of bespoke scaffold systems in partnership with specialist access providers

  • Programme sequencing to complete two glazing replacements per attendance wherever possible

  • Successfully re-sequenced works at short notice to keep the programme on track despite access restrictions

At a Glance

Overcoming Challenges

  • Deployment of IRATA rope access techniques, securely anchored to structural steelwork and weighted roof systems where required

  • Internal mechanical glass lifting utilising specialist hoists and lifting equipment

  • Design and installation of bespoke external scaffolding with integrated mechanical hoist for the most complex replacement works

  • Implementation of a two-stage bonded glass replacement process, ensuring safe removal, temporary weather protection, and seamless reinstatement

  • Delivery of all works on a weekend-only basis within a high-profile, blue-chip commercial environment

Just want to say thank you for your assistance and professionalism getting this project over the line. Really appreciated.

Dino Aloneftis, Small Works Manager, Deloitte LLP

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