Precision Concrete Pad Lifting & Sub-Grade Stabilization for Shed in Nobleton, ON
Challenge
In Nobleton, ON, environmental factors and natural drainage patterns can lead to subsurface soil erosion beneath outdoor structures. This project involved a large concrete pad supporting an outdoor shed, where the underlying soil had begun to wash away over time. As the voids expanded, the heavy structure lost physical support, causing the pad to sink and tilt.
One corner of the shed was essentially “floating” over a cavity, putting extreme stress on the frame and creating an entry point for water accumulation and pest intrusion. The instability not only threatened the shed’s structural integrity but also made the area unsafe and prone to future settlement. A precision engineering solution was required to restore stability and prevent recurrence.
Solution
Canadian Concrete Leveling applied a controlled polyurethane injection process to stabilize the sub-grade and lift the concrete pad. High-density, slow-expanding polymer resin was injected directly into the voids beneath the slab. The material’s low-viscosity flow allowed it to penetrate micro-cavities, consolidating loose soil and creating a dense, waterproof mass capable of supporting the shed’s weight permanently.
As the polymer expanded, the pad was gently and precisely lifted back to its original level position, eliminating the tilt and relieving stress on the shed’s frame. After the lift, the surrounding soil was smoothed and the perimeter sealed, ensuring proper drainage and integration with the landscape.
The results were immediate and long-lasting. The shed now rests fully stabilized, protected against future soil erosion and seasonal shifts. This approach demonstrates the effectiveness of precision polyurethane injection for correcting sinking concrete pads and supporting heavy outdoor structures. By stabilizing both the slab and the sub-grade simultaneously, the project delivered a durable, cost-effective solution with minimal disruption, preserving the integrity of the existing structure and landscape.
