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What Is

Chemical Grouting?


Chemical grouting piers are a specialized method used to stabilize and strengthen weak or unstable soils beneath foundations. This technique involves injecting a chemical grout, typically a polyurethane or similar resin, into the soil through strategically placed holes. The process begins with an in-depth analysis of the soil composition and the specific requirements of the foundation.

Once the appropriate injection points are determined, the chemical grout is carefully injected into the soil.


As the chemical grout permeates the soil, it reacts and expands, filling voids and binding soil particles together. This reaction forms solid, pier-like structures within the soil, significantly enhancing its load-bearing capacity and stability. Chemical grouting is highly effective in treating a variety of soil-related issues, such as soil erosion, water infiltration, and soil settlement, making it a versatile solution for foundation repair.


One of the primary benefits of chemical grouting piers is their ability to target specific problem areas with precision. This method allows for the direct treatment of the affected soil without the need for extensive excavation or disruption to the surrounding area. Additionally, the quick setting time of the chemical grout ensures a rapid stabilization process, which is particularly beneficial in urgent or time-sensitive scenarios.

Benefits of

Chemical Grouting


Chemical grouting piers offer several advantages, making them a popular choice for addressing complex foundation and soil stability issues. The most notable benefit is the precision and effectiveness of the technique. The injected chemical grout can be accurately targeted to specific areas, allowing for focused stabilization and strengthening of the foundation's support system.


The process is minimally invasive compared to traditional foundation repair methods. With chemical grouting, there's little to no need for large-scale excavation, significantly reducing the disturbance to the property and the environment. This makes chemical grouting an ideal solution for urban areas or sites where maintaining the integrity of the landscape is essential.


Another significant advantage is the speed and efficiency of the process. Chemical grouting typically has a fast curing time, allowing for quick stabilization of the soil and reducing the overall duration of the repair project. This efficiency is particularly valuable in commercial settings where minimizing downtime is crucial.


Chemical grouting is also known for its durability and long-term effectiveness. The chemical grout forms a strong, cohesive bond within the soil, creating a stable and durable foundation base that is resistant to future soil movement or degradation. This long-lasting solution can significantly reduce the likelihood of recurring foundation issues.


Additionally, the use of chemical grouting can be environmentally friendly, depending on the composition of the grout used. Many chemical grouts are designed to be non-toxic and have minimal environmental impact, aligning with sustainability and environmental preservation goals.


Lastly, the implementation of chemical grouting can lead to an increase in property value. By effectively addressing and resolving foundation and soil stability issues, it enhances the structural integrity and longevity of the building. This improvement, combined with the reduced need for future repairs, makes chemical grouting a valuable investment for property owners facing challenging soil conditions.


Signs You May Need Helical Piers


Floor & Wall Cracks

Cracks aren’t always scary. Sometimes they are superficial, such as minor or hairline cracks in plaster, cornices and skirting boards. Bigger cracks are another story and usually point to bigger underlying problems, such as uneven weight distribution due to weak foundations.


Cracks to look for could be interior (plaster, wall and floor tiles) or exterior (brickwork, render, concrete slab).


Ideally try to observe the cracks over a period of weeks or months to determine if the cracks you’ve noticed get bigger, wider or longer - or if new cracks appear. If they remain unchanged over a long period, the subsidence has likely run its course and the house has settled.


Unlevel Floors

Something that isn’t always as obvious as cracks is unlevel floors. When you are able to identify them however, a lean to one or more sides of your home is a strong sign that there are significant foundation issues at play.

In serious cases we’ve seen, you can stand at one end of a hallway and see the fall of the house as you look down the hall. Other times, unlevel floors will contribute to misaligned doors.

Generally you can use a spirit level to get some idea of how unlevel a room is. Or place a ball in a room and see if it remains still or if it rolls in a particular direction. But to understand how significant this is usually will require a professional.

Another thing to look for are irregular trenches forming around the edge of the building or slab, in the top layers of the soil. This is another sign of subsidence.


Unaligned Doors & Windows

Doors and windows can be good indicators of foundation problems.

Gaps appearing and getting wider around your windows and doors. Finding it hard to close (or reopen) your doors or windows, or not being able to lock them.

In more advanced cases, there are more visible leans to door, and door or window frames may begin pulling away from their surrounding walls.


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