A Guide to Understanding Pressure Grouting Concrete Repair

February 6, 2024

It is no surprise that concrete is one of the most commonly used building materials today—that is, after all, where the term “concrete jungle” came from. Strong, durable, and relatively impact-resistant, concrete is a popular choice for many construction projects.

Unfortunately, the ground that the concrete developments are built upon is not as always strong or durable. For such structural and foundation issues, concrete pressure grouting may be necessary. Read on to learn more about the process.


What Is Pressure Grouting? 

Pressure grouting (or “jet grouting”) refers to injecting grout material into an underground void, weakness, or fault. The grout may consist of various compounds and mixtures, including (but not limited to) chemicals, resins, and cement.

It aims to enhance the soil’s bearing capacity, reduce settlements, and improve structural support. The process can be applied to a wide range of soil types, from soil to gravel, to prevent sinking and settling.

Pressure grouting is a cost-effective way to address settlement issues and improve foundational stability; other reparation and excavation solutions are much more expensive and time-consuming. 


Applications of Pressure Grouting 

A versatile and effective form of soil stabilisation, pressure grouting can be used in various applications.

Firstly, it is often used to reduce settlement issues, such as sinkholes, subsidence, and voids, which lead to uneven floors and foundational issues. Over time, the soil may shift and compromise the structural integrity of the development resting above. During the pressure grouting process, the grout material fills such cavities, thus improving the soil’s bearing capacity and the foundation’s stability.

Additionally, pressure grouting can be used to seal cracks in walls and the foundation, providing extra support for the structure.

Pressure grouting can also be used for waterproofing purposes. Water ingress may lead to soil erosion and structural damage. Hence, it is best to inject a waterproof material to seal leaks.


Signs You May Need Pressure Grouting

If you suspect your building is experiencing foundation problems, you must consult a pressure grouting contractor to address the problem immediately. If left alone for too long, you may be forced to pay for costly repairs in the future.

Some signs to watch out for include:


1. Cracks in Walls and Foundation

When soil settles, voids and gaps may appear in the foundation, resulting in cracks in your development.


2. Uneven Floors

Soil settlement may cause the foundation to shift. As such, you may notice your floors sloping, sagging, or dipping.


3. Doors and Windows Cannot Close Properly

As the foundation settles or shifts, the frames of your doors and windows become misaligned and are consequently difficult to open and close.


4. Water Leakage and Damage

When soil settles, gaps and voids in the foundation are created, allowing water to seep through. Hence, you may notice signs of water damage or leaks.


Water Leakage and Damage



If your foundation is shifting or settling, engaging a pressure grouting contractor is critical. The earlier the problem is detected, the less costly and time-consuming the reparation project will be. Therefore, we recommend watching out for the abovementioned signs and issues.

If you’re looking for pressure grouting concrete repair services, check us out at OCL Building Services. As a general contractor in Singapore, we provide a range of building services, such as roof leakage waterproofing services and swimming pool maintenance.