Foundation Repair Methods

Foundation Repair Methods

Deciding which pier system will provide the best support for your home Foundation Repair Methods can be confusing. Below I have listed the advantages and disadvantages of the most commonly used foundation repair methods. Spread Footing, Drilled Piers, Pressed Piling and Steel Piers. The concrete piers all share the same problem, they are not installed as deep as Steel Piers.

For a repair pier to be effective, it has to be installed below the weather effective zone. The weather effective zone is the area of soil that is 3 to 4 feet under your homes foundation. This area of soil expands when wet and shrinks when dry, this movement will cause the concrete methods of repair to eventually fail. Contact us today and we will answer any questions you have about foundation repair.

Commonly Used Foundation Repair Methods

When it comes to foundation repair, many different types of methods are used by contractors to stabilize the foundation. Most of the methods can be divided into two broad categories. One category of methods involves supporting the foundation by building years under the foundation.

The other category of methods involves raising the foundation by pouring concrete underneath it. Here is a list of some of the most common methods used for repairing foundation.

Concrete Piers

These concrete piers are made by pouring concrete into the already drilled holes below the foundation. One of the biggest advantages of these concrete piers is that they can take on virtually any kind of load. Each of the columns is usually between 20 to 20 feet in depth. The concrete column also has reinforcing steel bars.

Once the concrete columns have hardened for a period of seven days, these are lifted with the help of hydraulic jacks and then foundation is lifted with the help of these columns. Once the foundation has been lifted, spacers are used to support the foundation on these columns.

This method involves drilling holes through the floor which means that the contractor will need to destroy the floors and tiles. Ultimately, it is a very expensive method of repair.

Concrete Pilings

As the name suggests, these pre-made concrete pilings are pushed into the holes under the foundation. One of the biggest advantages of this method is that it can be done extremely fast as there is no need to wait for concrete hardening.

It is not necessary to cut holes through your floors to install the concrete pilings. The contractor can also dig tunnels under the house to install the pilings. If tunnels are used to install these concrete columns, one can still live inside the house while the repair work is being done.

Soil Injection Method

This method is used by contractors when the soil underneath the foundation expands due to rainwater and starts moving upward. It is recommended to use this method when the uplift has been less than 1.5 inches and does not extend over 10 feet in the building. In this method, non-toxic chemicals such as ammonium salts and potassium ions are poured into the ground under the building.

These chemicals do not allow the soil under foundation to absorb water which means that the soil won’t swell when there are rains.

The injection is done around the foundation. Internal injections can also be done but the contents of the house will need to be removed due to use of chemicals.

Slabjacking

This is one of the most common methods used for repairing foundation. In this method, concrete is pumped underneath the foundation to lift it. Some of the contractors may also use polyurethane resins. One of the advantages of using these resins is that they offer more control and are more precise as compared to concrete.

Another advantage of this method is that it is extremely fast and much cheaper as compared to other methods. This method should not be used in a place where there is a chance of soil expansion underneath concrete.