BASEMENT FLOOD PROBLEMS

Capillary Action

When groundwater comes up through the foundation and slab. This type of basement flood problems generally occur when the groundwater table is higher than the basement floor and foundation and can be somewhat offset by the use of a sump pump.

Leakage or Intrusion

Water leaking in through the basement walls and foundation, usual runoff from improper grading and drainage. This can be prevented by proper grading to aid water runoff and drainage away from the foundation, and by the application of a basement waterproofing product to the outer surfaces of the basement wall and foundation.

Sewage and/or Storm Drain Backflow

This is much less common than 1 & 2 above. This basement flood happens when water or waste materials come up through basement floor drains, a sink or bathtub drain or toilet, during heavy rainfall or snowmelt. This may mean that the city main is blocked or overwhelmed by the volume of water; as a result, wastewater is backing up into your drain line and home.

If you experience a backflow, call your local sewer or sanitation district immediately. Even if the cause of the backflow damage lies with the city or sanitation district, the homeowner must act quickly to manage the cleanup.

Unlike 1 & 2, a backflow can inflict serious damage, including flooding a room or an entire home. Sometimes, homeowners must move off the property during restoration. The cost of restoration after flooding and the hassle of dealing with insurance can be a major headache for homeowners.

General Solution for Any of The Three Basement Flood Causes

A properly installed, basement waterproofing systems. A sump pump with drain tile can greatly reduce the chances of getting water in your basement. Be sure to direct the discharge hose away from the house, out towards the street if possible. Otherwise divert it to a low point in the yard, clear of neighbours’ property. Discharge hose cannot cross city sidewalks. Periodically clean sump pit and check the operation of the pump. Ontario building code and City by-laws prohibit discharge into the sanitary sewer.

basement flood repair

Installing a complete basement waterproofing system during the construction process is highly recommended. Basement wall waterproofing, foundation waterproofing, and concrete waterproofing can all be done as a retrofit. However considerable excavation may be necessary to expose surfaces for application of waterproofing material, and obviously, this can become quite expensive.

The best-laid plan involves proper grading and drainage, application of a basement waterproofing product to seal exterior surfaces, and a sump pump system that can adequately handle fluctuating water tables at their peak levels.

Waiting until a problem is detected carries with it some consequences, and considerable damage will probably already have been done by this stage, including the formation of mould or mildew on surfaces or in basement framing.

This may necessitate recruiting a waterproofing contractor, who also provides mould remediation services to help with the basement flood problems.

The post BASEMENT FLOOD PROBLEMS appeared first on ACCL Waterproofing.

By Fernando Rebeles June 25, 2026
Many homeowners believe that applying a waterproof coating to a foundation wall is enough to keep water out of their basement. While waterproofing membranes play a critical role in preventing water penetration, the most effective exterior waterproofing systems combine a waterproof membrane with a drainage board.  Together, these components create a complete defense system that protects your foundation from moisture, hydrostatic pressure, and long-term structural damage.
By Fernando Rebeles June 18, 2026
Water is leaking in the basement
By Fernando Rebeles June 10, 2026
Water damage often starts silently behind walls and foundations. Learn how hidden moisture affects your home and how waterproofing prevents costly repairs and mold growth.
By Fernando Rebeles June 9, 2026
Basement waterproofing is most effective before damage occurs. Learn how early prevention protects your foundation, reduces repair costs, and prevents mold growth.
By Fernando Rebeles June 9, 2026
Rainy days ahead....
By Fernando Rebeles April 9, 2026
Spring Has Arrived. Is Your Basement Ready?
basement moisture prevention Ontario, basement waterproofing Ontario, prevent basement dampness, wet
By Fernando Rebeles February 25, 2026
Prevent basement moisture in Southern Ontario year-round. Learn tips to keep your basement dry, safe, and avoid costly water damage today!
By Nkeiruka Iro July 24, 2025
Basements are a valuable part of any home, providing additional space for storage, entertainment, or even living areas. However, basements are also prone to water damage, mold, and mildew due to their underground location. One effective way to protect your basement and enhance its durability... The post The Benefits of Coating Your Basement appeared first on ACCL Waterproofing.
By Nkeiruka Iro July 24, 2025
Waterproofing is a crucial step in protecting buildings and structures from water damage. However, waterproofing systems can degrade over time due to various factors such as weather conditions, wear and tear, and poor maintenance. To ensure that your waterproofing lasts longer, here are some tips... The post Making Waterproofing Last Longer: Tips and Strategies appeared first on ACCL Waterproofing.
By Nkeiruka Iro July 23, 2025
Layering is a crucial concept in waterproofing, involving the application of multiple layers of materials to create a robust and effective barrier against water penetration. In this article, we’ll explore the importance of layering in waterproofing, the different types of layers, and best practices for... The post Layering in Waterproofing: A Key to Effective Protection appeared first on ACCL Waterproofing.