Sustainable Innovation in Structural Reuse & Strengthening

Slabtec delivers next-generation strengthening and remediation solutions that enable the reuse and revitalisation of existing concrete structures.

From advanced CFRP systems to precision concrete repair, we help clients extend asset life, reduce embodied carbon, and meet performance goals with minimal environmental impact.

Recognised for excellence in adaptive reuse and sustainable engineering, Slabtec is redefining how concrete structures are strengthened, restored, and reused to support a lower-carbon future for construction.

Underpinned by a deep understanding of design and structural behaviour, we are engineers first — and this forms the foundation of every solution we deliver.

Our services span all aspects of strengthening and remediation for concrete structures, combining technical expertise with practical, on-site delivery.

Existing Structures

We specialise in helping clients extend the life of concrete structures through advanced repair, strengthening, and carbon fibre solutions.

Adaptive reuse projects are a perfect fit for our expertise, helping to minimise waste while delivering safe, modern outcomes that support community growth.

Notable projects include the award-winning The Space House in London and the Quay Quarter Tower in Sydney.

We promote innovative, proven solutions utilising various CFRP-based strengthening techniques depending on the nature of strengthening required for your project. Our knowledge and experience in this area are second to none, and we’re extremely proud of the work our teams do every day.

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We provide solutions for all types of concrete repair. Whether it is due to deterioration, carbonation, damage, or defective concrete, we put forward a remediation solution to ensure the section’s durability and strength are fully reinstated.

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We understand structures. We know why they crack and how to fix them. Our experienced teams design custom solutions to address any kind of crack that emerges. Typically, a crack is the symptom of a problem, not the cause.

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External post-tensioning is a proven active strengthening method for upgrading existing structures, including bridges, buildings and tanks. It involves installing prestressing cables or bars outside the structural section, guided by deviators along the most effective load path.

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Forensic services are often utilised to assess potential compliance issues between the approved structural documentation and
the built structure. We utilise both non-destructive and destructive testing methods to understand the composition of existing structures.

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We have significant experience with structural grouting, and our pumps can mix and place proprietary grouts with or without cementitious or epoxy-based aggregate.

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Corrosion is one of the most common and expensive durability issues stakeholders encounter in both building and civil structures.

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Quay Quarter Tower-Sydney

PLC Aquatic & Sports Center

New Structures

The Interspan Group brings unique expertise in post-tensioning, construction methodology, and lifting operations that reduce CO₂ emissions, material usage, and construction program.

Through effective design, post-tensioned slabs enable material and embodied carbon reductions versus a conventionally reinforced slab, while maintaining the inherent benefits of concrete construction.

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Interspan has extensive experience in the supply and installation of post-tensioning works in bridges, using state-of-the-art equipment to apply uniform stress to the separate strands of the tendon simultaneously.

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Stress bar post-tensioning systems offer a cost-effective solution for applying post-tensioning forces to short, straight tendons without the need for any profiles.

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Featured Project

Slabtec was established in Sydney in 2014 to deliver specialist concrete strengthening and remediation services.

Partnering with Interspan in 2020 allowed us to optimise the synergies within the businesses and expand Slabtec’s service offerings throughout Interspan’s international network.

Our leaders bring a wealth of experience in Structural Engineering, which underpins our fundamental point of difference: the ability to develop and deliver innovative solutions for our projects.

sirius-building

The Sirius Building

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Interspan Group Joins DYWIDAG

The combination of DYWIDAG, Interspan, and Slabtec brings together decades of specialist expertise in post-tensioning, structural strengthening, and concrete solutions – delivering more value to our clients across Australia, New Zealand, Europe and beyond.

“Interspan is an exceptional business with a strong track record of customer satisfaction and financial performance. The combination of Interspan and DYWIDAG reinforces our position as a global market leader in the provision of post-tensioning, stay-cable solutions, geotechnical products and specialist repair and strengthening solutions” – Hugh Pelham, DYWIDAG Group CEO

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