Basement lowering
Basement Extension
With property values rising across Quebec, it’s only natural for homeowners to want to optimize their space by developing the basement.
Basement lowering, also known as underpinning or basement excavation, involves digging beneath a home to increase ceiling height or reinforce the foundation. This type of project is often undertaken to make a basement livable, improve the structural stability of a building, or add a new level to the property.
Expanding from below involves underpinning work, which typically includes:
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Demolishing the existing floor
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Excavating and pouring new foundations
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Installing a waterproof membrane
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Installing an interior drainage system
We can take care of the underpinning work on your home to create a brand-new basement and increase your property’s value.
THE GOUDRONS DU QUÉBEC SOLUTION
Step 1: Assessment and Planning
A structural engineer will first assess the stability of the existing foundations to determine the feasibility of the excavation. They will also perform tests to check the soil type on your property and the groundwater level, and will calculate the specifications to be followed during construction for the underpinning work.
Step 2: Site Preparation
Our team carries out the demolition of the existing concrete slab while ensuring optimal support for the existing structures, maintaining safety and stability on the site.
Step 3: Excavation and Lowering
Our team will carry out the excavation in sections to avoid destabilizing the foundations. They will perform the formwork and build a new concrete underpinning foundation beneath the existing foundations.
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Our team will then install a French drain and a waterproof membrane to prevent moisture and water infiltration in your basement.
Step 4: New Floor Construction
Our team will add insulation made of extruded polystyrene or polyurethane foam under the slab, and finally, pour a new concrete slab.
Good to know
This type of structural work requires obtaining a building permit from your municipality.
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