Poly Foam Injection

Lift Your Concrete & Eliminate Tripping Hazards

Uneven concrete can be a huge liability by creating trip hazards that can lead to injury to yourself, family or guests. Concrete walkways can move slowly over time and often go unnoticed until they become a potential hazard.

Uneven concrete slab repair using polyurethane injections can be performed on walkways, pathways, and driveways to patios, pool decks, and ramps. Bay Area Underpinning offers solutions for concrete lifting in Solano County, Contra Costa County, Yolo County, Sacramento County, our solution can restore the appearance and structural integrity of your sunken slab.

Why Does Concrete Settle?

There are many reasons that concrete can settle such as poor drainage, poor compaction, poor site conditions and tree roots. Often in our area it is most commonly due to the clay rich soils that expand and retract with moisture content. As soil becomes saturated with water, the clay expands and as the clay dries out it retracts. The constant change in the moisture content allows for unstable soil and for your concrete to move freely.

What Is Polyurethane Foam Injection?

Polyurethane foam injection is a method of lifting and leveling uneven concrete surfaces such as walkways, driveways, patios, ada ramps, and pool decks. Typically used on trippings hazards or areas that are experiencing voids. It’s a cost-effective and eco-friendly alternative to tearing up the slab and pouring new concrete.

Steps to Polyurethane Lifting

  1. ⅝ ” holes are drilled into the affected slab in a grid pattern as needed. In some cases we will use ⅜” with our smaller poly machine and for special injections.
  2. Polyurethane foam is injected under the slab via the holes.
  3. The foam immediately begins to expand from the pressure and raises the slab.
  4. Once the slab has been raised, the holes are patched with a compound that best matches the color of the concrete.

Read more about – How to repair uneven floor?

How Long Does Polyjacking Take?

It usually takes no more than a few hours to raise an uneven sidewalk, driveway, patio, etc. Fifteen minutes after the repair is complete, the slab is ready for use again.

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Benefits of Polyurethane Foam: “Raise it, Don’t Replace It”

There are many benefits to using polyurethane foam injection to lift your concrete besides just eliminating trip hazards. The cost of doing the poly injection is usually less than half of what it costs to replace the concrete and once injected can be used immediately which is ideal in high traffic areas because there is no cure time.

Advantages of Polyurethane Foam

  • High Expansion
  • Works to displace water if present
  • Makes bond with soil and concrete
  • Closed cell, low in weight
  • 90% full strength within 15-20 minutes

How Much Poly Foam Injection Costs?

The cost of polyurethane foam injection depends primarily on the size of the affected area and ease of access. Each project is case by case, that is why we offer homeowners a free tripping hazard evaluation. Contact us today to schedule your evaluation and receive a concrete leveling estimate.


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