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:
-
Demolishing the existing floor
-
Excavating and pouring new foundations
-
Installing a waterproof membrane
-
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 member of our team, typically a structural engineer, will first assess the strength of your existing foundation to determine whether excavation is feasible. They will also conduct tests to identify the type of soil on your property and assess the water table level.
Step 2: Site Preparation
Our team will then install steel beams and jacks to reinforce the structure and support the house during the work. They will also inspect water lines, sewage systems, and electrical wiring, and install temporary conduits if necessary.
Good to know
This type of structural work requires obtaining a building permit from your municipality.
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.
Learn More
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.
Other Residential Solutions
Formwork
Looking to expand your home or modify your foundation? We can handle the excavation, construction, and waterproofing of the new foundation—all done in-house, with no subcontracting. This streamlines the process and ensures top-quality workmanship.
Double Wall
When a foundation crumbles, it’s not always necessary to replace it. If a large portion of your foundation is still solid and in good condition—whether it’s concrete blocks or poured concrete—we can restore it without changing the structure. Our technique focuses on reinforcing the foundation, is non-invasive, and is carried out mainly outside the building.
Custom Projects
Our specialized team can support you in your custom concrete projects. With our experience and attention to detail, we will bring your ideas to life using high-quality materials to ensure the best results.
Why repair cracks by injection from the inside?
Foundation crack repair by epoxy or polyurethane injection from the inside offers many advantages:
No noise, no odor, no pollution
No excavation required outside
Concrete solidification thanks to liquid epoxy
More flexible repair thanks to polyurethane
Can be performed year-round, regardless of weather conditions
Free quote
Don’t ignore the early signs!
