Contech is New Zealand’s leading specialist civil engineering company focused on concrete construction and remediation. As engineered concrete specialists, we bring together design support, buildability insight, and disciplined delivery to create structures that perform for decades. From new builds to complex upgrades, our people combine practical know-how with innovative methods developed in partnership with leading civil engineering firms around the world.
Strength, speed, and reliability define our concrete work. We design and deliver concrete slabs for commercial, industrial, and infrastructure projects, ensuring flatness, durability, and efficient reinforcement. Our expertise in post tensioning unlocks longer spans, thinner sections, and reduced cracking, while keeping programmes predictable. For high-rise floors, car parks, and podiums, we provide post-tensioned slabs and suspended post-tensioned slabs that control deflection and streamline service integration. When time and budget are tight, our pt slab construction methods coordinate stressing, sequencing, and pours to minimise rework and maximise quality. From concept to handover, we support concrete slab construction with clear communication, robust QA, and a relentless focus on safety.
New Zealand’s seismic context demands resilience. Contech delivers targeted seismic strengthening that improves life safety and asset continuity, from diaphragm and connection upgrades to bearing replacements and composite solutions. When deterioration or damage threatens performance, our concrete construction remediation teams investigate root causes, specify the right repair system, and execute with precision. In marine and transport environments, we restore capacity and durability through pile jacketing, protecting reinforcement and extending service life. For complex geometries and constrained access, sprayed concrete provides a fast, effective solution that bonds well and stands up to suspended post-tensioned slabs harsh conditions.
Our approach is collaborative and evidence-led. Early engagement allows us to align design intent with site realities, refine loads and joints, and select mixes that meet durability targets. Through integrated concrete engineering services, we handle investigation, testing, temporary works, access, and quality control so there are no surprises on site. Every stage is documented—from methodology and shop drawings to traceable materials and as‑builts—giving owners, contractors, and consultants the confidence to make informed decisions.
What sets Contech apart is a commitment to innovation backed by hands-on experience. We have developed new methodologies and products that shorten programmes without compromising quality, and we continually benchmark against international best practice. Our teams are trained for live, high‑risk, and environmentally sensitive sites, and our culture prioritises safety, environmental stewardship, and long-term asset value.
Whether you are planning a distribution centre, upgrading a bridge, or rehabilitating water, transport, or marine assets, Contech brings the clarity and craftsmanship needed to get it right the first time. Talk to us about civil construction that delivers, from sophisticated post tensioning and concrete slab construction to specialist remediation including pile jacketing, sprayed concrete, and seismic strengthening. When you need a partner who stands behind the work, choose the New Zealand team trusted for complex concrete and proven results.