Voids Filling under concrete

Voids or cavity under foundation slab? Don’t Replace It. We Can Help!

Voids Filling under concrete Services in Maryland

If you have voids under your concrete slab or foundation, we can help! We specialize in voids filling under concrete using Polyurethane Foam Injection. Contact us today for a Free Estimate.

What Causes Voids under Concrete Slabs?

There are various reasons why voids form underneath concrete slabs. While erosion is a commonly cited culprit, there are also naturally occurring reasons for the presence of voids under slab foundations.

Erosion Due to Poor Water Drainage and Plumbing Leaks

Without proper measures to drain water around slab foundations, there is an increased possibility of erosion of the topsoil. Lack of drain channels and poor foundation sloping will all result in a loss of foundation soil. This frequently leads to the formation of voids beneath concrete slab foundations.

Faulty plumbing can also contribute to the creation of voids. The accumulation of water leaking from the faulty pipes underneath building structures will trigger further soil erosion.

Soil Settlement and Consolidation

These cause voids under concrete slabs. These two processes develop slowly and are worsened by the erosive behavior of poorly drained water.

Potential Effects of a Void under a Concrete Slab

Defects underneath concrete slab foundations will manifest in several ways including:

Tilted/leaning building walls
Wall buckling
Uneven floor surfaces with bowls and dips
Total foundation disruption

Our steps to Polyurethane Voids Filling Under a Concrete Slab

The voids filling process generally begins with drilling 3/8″ holes into the concrete, strategically located to maximize voids filling.
When the Polyurethane is injected under a high pressure into the concrete slab, the air bubbles expands and the resin reacts and become solid foam.
During the injection, the Polyurethane will expand in all directions and fill any void in week soils under the slab causing the sub-soils to become more dense and stable.
Once the void space is filled, the access holes are patched and the work is complete.

The benefits of using Polyurethane Voids Filling

Cost Effective: cheaper than demolition, soil remediation, and slab replacement.
Quick Cure Time: typically, polyurethane cures within 15 minutes after injection. With this short time span, you’re able to walk the area, even on hot days.
Hydrophobic: specifically designed polyurethane can be used underwater or in wet conditions.
Strength: The foam will retain its structure and strength, reducing the possibility of new gaps or settlement.
Lightweight: concrete weighs 150 lbs. per cubic foot, where polyurethane weighs 3 lbs. per cubic foot (meaning it will not overburden your soil).
3/8″ Injection Holes: the injection holes for a polyurethane leveling are approximately the size of a dime. This allows for less visible patching.
Eco-friendly: Polyurethane foam is made in part from recycled and renewable materials. It won’t rot underground, nor will it pollute the surrounding soil and groundwater. The longevity of polyurethane foam also makes it less likely that property owners will have to repeat the repair process, helping them to conserve resources.