Who we are
Keltbray is a UK-leading specialist in construction engineering and a major civil services group. We are at the forefront of delivering sustainable, innovative, and high-performance solutions. Our purpose is to redefine the way sustainable development is delivered.
Based on our collective and multidisciplinary experience, we focus our integrated services on solving customers’ engineering challenges in a rapidly changing world. Working in partnership with our stakeholders, we are actively contributing to economic growth, social advancement, and environmental protection.
Remodelling
Remodelling is a key strategy for updating and adapting existing buildings to meet contemporary needs.
This capability is becoming increasingly important as it aligns with circular economy principles and sustainability practices, providing a more environmentally focussed and sustainable option for the construction industry.
Keltbray brings decades of experience to remodelling projects. We are experts in early engagement, and our approach to this field is multidisciplinary and bespoke. Our Remodelling services include:
– Pre-construction Services
– Critical Investigation
– Design
– Circular Economy Optioneering
– Temporary Works
– Structural Alteration
– Groundworks
– Façade Retention
– Soft and Hard Stripping
– Cut and Carve Existing Structures
Wentworth House Technical Services
Wentworth is our in-house design consultancy, specialising in surveying, testing, repair, and verification of existing structures. The Technical Services team provides expertise for complex engineering projects, collaborating closely with the design team to offer a seamless, one-stop solution.
Sustainability
and Circularity Practices
Sustainability runs through everything we do, from the people we support, the company we sustain, the local communities we work in, and the planet we live on. Keltbray’s deep commitment to sustainability drives us to seek the best practices in carbon reduction and champion circular economy in each and every one of our projects.
We collaborate with clients to deliver solutions aligned with the resource management hierarchy, ensuring we are well-equipped to support at every level.
Our Projects
Keltbray has extensive experience of carrying out enabling works, temporary works designs and installations, structural alterations and new construction elements on existing buildings that are being remodelled. Among our main projects are:
– Daniel House
– 100 New Bridge Street
– London Museum
– 76 – 78 Upper Ground
76 – 78 UPPER GROUND
– Woolgate Exchange – Peterborough Court – 334 Oxford Street – 100 Liverpool Street
The 76-78 Upper Ground project involved transforming the former 1980s IBM building, a Grade II listed structure adjacent to the National Theatre on London’s Southbank, into a flexible and spacious modern workspace.
Eighty percent of the existing structure was retained. The building was sensitively refurbished and extended to deliver an additional 11,000m² of floor space. Keltbray provided the following services to enable this awardwinning remodelling project:
– Soft strip
– Partial demolition
– Design and installation of temporary works
– Dismantling of the existing façade which was later reinstalled on the project
– Structural strengthening of the retained structure
– Piling
– Substructure works & Superstructure works
Key Challenges and Solutions
Site Logistics: the site, located in a busy conservation area, required extensive negotiations with Lambeth to agree on vehicle routes and logistics to meet strict planning requirements.
Neighbourhood Liaison: regular communication with local community groups and The National Theatre ensured minimal disruption to matinee performances.
Heritage Items and Circular
Economy: Grade II listed building items were carefully removed for reuse, with bespoke solutions to prevent damage.
Circular Economy Achievements
Retaining 62 listed façade panels and 20 listed core façade panels, resulting in 88,068 kgCO2e emission savings.
Salvaging 27,360 floor tiles, 95 tonnes of paving blocks, and 71 tonnes of bricks for reuse.
Recycling 20 tonnes of glazing and reusing significant amounts of timber on-site.
At a glance
Location London Borough of Lambeth
Client Stanhope
Main Contractor Multiplex/Keltbray
£32m
Value of contract
Project Scope
Design & installation of temporary works; soft strip; demolition; structural alterations; piling; RC sub and superstructure works.
