Many homeowners in Toronto and GTA face house foundation issues due to high water table area, seasonal snow melting, and occasional flooding.
A compromised foundation is one of the most critical structural problems that homeowners face. Foundation is essential to provide structural integrity of the house by transferring live and dead loads to the ground. A leading concern that can damage the structural integrity of the building is water ingress into the foundation.

Mold Spores. Magnified Image.


Risks of not waterproofing the foundation

Structural damage: Foundation has wet soil underneath it, which can shift due to swelling or loss of strength. A dry foundation is critical since these shifts harm the building's structural integrity. If the foundation is not waterproofed, the changes can result in cracks in the floor and walls, which can further lead to expensive repairs.

Mold and mildew: Besides, dampness in the foundation presents a conducive environment for the growth of mildew and mold. While mold is a severe health hazard that can cause respiratory and skin problems, it can also lead to unpleasant smell in basement and surroundings.

Poor water flows: Conventional concrete may keep out water if there are no cracks in the foundation, but it is not entirely waterproof. Water vapor from damp soil can penetrate easily into the concrete. Preventing water from traversing the pavement and channeling it away from the foundation is crucial to maintaining structural integrity.
If adequate channels are not provided for water drainage, there can be ongoing problems with leaks and water seepage.


Foundation wall damaged.
Wall crack occurred due to aging, allowing water to penetrate the house.

Humidity Concerns:
Without waterproofing the foundation, humidity levels can be high. Waterproofing enables optimal control of humidity in the basement and in the house, which also helps prevent the growth of mold.

Flood Exposure: Cracks or leaks in the foundation can lead to flooding of the basement, which can cause long term structural damage.
Internal and external waterproofing
Waterproofing can be done internally and externally to provide maximum protection against leaks and flooding.
Cracks in concrete foundations are the standard source for water entry. In internal waterproofing, experts use a special sealant on the openings of such cracks from the interior while ensuring it penetrates to the outside all the way. The sealants used are strong enough to prevent leaks in the face of high humidity levels.
Watertight coatings are viable alternatives as they adhere to concrete walls permanently and are able to effectively function when subjected to condensation or dampness.
Exterior waterproofing carried out by professionals involves excavation to the base of foundation and around the house. After excavating, professional waterproofing experts use a waterproof coating to ensure the walls are sealed and are watertight. This helps direct the water away to the drainage system. Exterior waterproofing enables protection of interiors of the home as well from moisture damage.
09/17/2019