New Zealand’s slab lifting and concrete re-levelling specialist since 1989

Warehouse floors and factory slabs can sink when the ground beneath the concrete loses support. Common causes include weak sub-grade soils, voids beneath slabs, water infiltration through open joints, truck or forklift traffic, poor drainage, machinery vibration and long-term ground settlement. If the floor is uneven, cracked or moving, it should be assessed before the issue affects safety or operations.

In many cases, yes. If the concrete slab is suitable, Mainmark can use non-invasive slab lifting and ground improvement methods to fill voids, compact weak ground and raise affected areas back towards level. This can often avoid demolition, slab replacement and extended operational downtime.

Mainmark drills small holes through the affected slab, then injects Teretek® material beneath the concrete. The material expands quickly to fill voids, compact loose or weak sub-grade soils and re-support the slab. Continued injection can raise the slab, and treated areas can often return to full operation immediately after the work is completed.

Misaligned concrete slab joints can create a hazard for forklift traffic. When a forklift travels across a raised or sunken slab edge, the jolt can shift the load, increase wear on tyres and equipment, and create safety risks for operators and nearby workers. Re-levelling can help restore a safer, smoother operating surface.

Yes. Mainmark’s slab lifting and floor re-levelling methods are designed to minimise disruption in operational environments. Because the repair process is targeted, fast-curing and non-invasive, treated slab sections can often be returned to use quickly, helping warehouses, factories and distribution centres maintain productivity.

Yes. Mainmark provides void filling and ground improvement solutions for warehouses, factories, truck yards, hardstands, driveways and loading areas. Filling voids beneath slabs helps restore support, reduce settlement and improve the performance of concrete surfaces exposed to heavy vehicles, machinery or frequent traffic.

Warning signs include uneven slab joints, sunken concrete, rocking slabs, cracks, bouncy floor sections, trip hazards, ponding water, forklift jolts, damaged joint edges or machinery vibration affecting the slab. These issues can indicate weak ground, voids or settlement beneath the concrete floor.

The cost depends on the size of the affected area, the amount of settlement, access requirements, slab condition, ground conditions and the repair method required. A site assessment is the best way to identify the cause of the floor movement and receive a detailed quote for the most practical repair approach.

Mainmark provides warehouse floor re-levelling, factory slab lifting, void filling and ground improvement solutions across New Zealand, including the Upper North Island, Lower North Island and South Island. If your facility has sinking slabs, uneven joints, hardstand settlement or forklift traffic hazards, Mainmark can assess the site and recommend a suitable repair method.

Mainmark has decades of experience delivering non-invasive ground improvement, slab lifting, void filling and floor re-levelling solutions for commercial and industrial facilities. Facility managers choose Mainmark because its methods are fast, cost-effective, immediately trafficable and designed to reduce disruption while addressing the cause of slab movement.