The voids under the concrete slab must be filled. The best solution is to use polyurethane foam or polyjacking. This process involves the injection underneath the slab through penny-sized holes drilled in the concrete. Once injected beneath the concrete, the polyurethane expands to fill the voids and compact the soil around the voids. This helps to create a more stable base for the entire foundation.

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Some of the most common issues that result in void formation are:

• Soil Shrinkage: When the weather is extremely hot and dry, the soil under the slab will shrink, forming voids and gaps underneath the foundation.

• Erosion: These voids form due to erosion from excessive rainfall, which washes away the soil under and around the concrete slab.

• Hydrostatic Pressure: Heavy precipitation can lead to an increase in hydrostatic pressure in the soil. This pressure pushes on the concrete, causing it to shift, settle, and even develop slab cracks.

• Shifting Soil: Erosion, shrinkage, and poor compaction may cause the soil under your slab to shift and form voids. 

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We use underground cameras to detect sizable voids. It is a fast, accurate, and inexpensive method for void detection. The cameras help to accurately locate voids, underground structures, embedded utilities, and other objects.

 

Polyurethane foam is commonly used for:

• Seawall Repair, Boat launches

• Roadway voids: Highway, city streets, sidewalk

• Residential Void filling beneath driveways, patio, and foundation 

 

Polyurethane foam can flow long distances beneath the surface directly from access points. Void filling is faster and more cost-effective than demolition and alternative methods.
With On The Level void filling, you can avoid heavy trucks and equipment required for using backfill or cement. Polyurethane is a great replacement for washout eroded soils.

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 No mess left behind, any excess polyurethane foam will be neatly cleaned off the surface.

 Ready to use immediately!

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