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Underpinning Your Basement: Methods for Strengthening Foundations

Updated: Apr 29, 2024

Why You Should Consider Underpinning Your Basement

Underpinning is a foundation repair method that strengthens and can lift sinking slab foundations. It’s a specialist job, so you should use a reputable company with experience in this area.


Underpinning basement, Underpinning foundations methods and Underpinning concrete slab

Basement underpinning can strengthen the foundations of your home, prevent further damage and create additional space for a livable space. It can also bring your house up to code and eliminate structural issues.


Securing Your Foundation: Underpinning Basement

Piling contractorsPiling contractors strengthen foundations to make homes safer and more livable. While it can be expensive, it boosts your home's value and adds living space. It also shields your house from future issues like disasters and floods. Choosing a skilled contractor is crucial for using the correct methods, materials, and tools to secure your foundation effectively.


The primary purpose of underpinning is to address structural issues such as cracks, shifting, and settling. In addition, it can help with drainage and prevent water intrusion into the basement. This can be caused by poor construction, changes in soil conditions, or natural disasters. Underpinning will restore your foundation to its original state and prevent further damage to your home.


Once completed, underpinning will leave you with additional livable space that can be used for a home theater, family room, or a playroom. This is a great way to increase the value of your home without sacrificing valuable yard space. Additionally, it is less expensive than a traditional addition. It will also save on energy costs and reduce your carbon footprint. The team at City Wide Group is experienced in basement underpinning and will help you achieve the home of your dreams.


Underpinning foundations methods

Groundworks near meNearby groundworks often involve underpinning, which is a complex and time-consuming task. Skilled foundation builders are needed for this work. Despite its challenges, a solid foundation ensures safety and protects homes from structural damage, making it a worthwhile investment.


Different underpinning methods exist, but all of them involve extending the existing foundation either lengthwise or breadthwise and laying it over a stronger soil stratum. This method is ideal for sites where excavating to extraordinary depths is impossible or unfeasible. Screw pile underpinning is another method for this purpose, as it involves driving long screw-like piles into the ground.


Underpinning basement, Underpinning foundations methods and Underpinning concrete slab

The most common reason for underpinning is to prevent subsidence, which occurs when the foundation of a building sinks below its original height. This can cause cracks in the walls and floors, and it is dangerous for the occupants of the building. Underpinning can prevent subsidence from occurring, or it can stabilise a foundation that is already sinking.


Underpinning can also be used to expand a property’s living space. Traditional basements are often underutilized, and converting them to living space can add value to a home. This can also be a cost-effective way to increase the liveable space of a home without increasing its footprint. Basement underpinning can be done in a variety of ways, and it is important to choose a professional company with extensive experience in this type of work.


Underpinning concrete slab

Underpinning concrete slab: The underpinning process is relatively safe, provided an experienced and qualified contractor carries out the work. The process involves digging holes beneath the foundation of your home and pouring concrete into these spaces to raise the existing slab. Using this method, you can add additional square footage to your home and give it a new lease on life. This space can be used for a variety of purposes, from an extra bedroom to a home office.


Another benefit of underpinning is that it can help restore your home’s structural integrity. It will help you avoid costly repairs and re-building, and make your home more valuable. It will also give you peace of mind by ensuring that your family’s home is stable and safe for everyone to live in.


Mudjacking is a popular underpinning method that uses a combination of slurry and cement to lift existing concrete slabs. Once access points have been created around the slab, a high-pressure pump is used to inject a mixture of slurry and cement into the soil below the footing. As the slurry is pumped, it raises the existing concrete slab to its original height.


Underpinning your home can increase the headspace in your basement and allow you to transform it into a more usable space. It can be turned into a cozy reading nook bathed in natural light, or a sleek home office with a minimalist aesthetic.


Final Words

Underpinning is a term that describes a number of methods to re-support a building’s foundation. These techniques are used when the existing foundation system is compromised, or if work needs to be carried out that would otherwise damage the structure. Underpinning can also be used to add more living space, such as a basement or loft conversion.


It’s important to find a qualified and experienced company to perform underpinning work. This type of specialty construction is extremely complicated, and if done incorrectly, it can lead to serious structural problems. It’s also important to ensure that all excavation is conducted in a safe and controlled manner.

A professional company will conduct a thorough inspection and survey of the site before beginning the underpinning process. 


During the survey, the engineer will examine the site and recommend any necessary repairs. After the inspection, the company will dig down to the appropriate bearing depth and install the new foundation. The work is typically completed in stages to maintain the stability of the structure throughout the process.


Underpinning your basement is a great way to add more living space without having to build a costly home addition. It’s also a good option if you’re looking to expand your family or want to convert a basement or crawl space into a rental unit. In Toronto, this upgrade is much more affordable than adding a second floor or home addition and doesn’t require rezoning or Committee of Adjustment approvals.


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