Understanding How a Basement Leaks

As your trusted local leader in basement waterproofing, Basement Technologies Calgary enjoys educating and informing our many customers. We hope you find the following information helpful. If you have questions or would like to schedule service, feel free to call or use our contact form.

Floor & Wall Joint
The most common place for basement seepage is the floor and wall joint. The footing, foundation wall and concrete floor are three separate structures and inherently there are seams or joints. The floor wall joint is the most typical location for water entry into a basement.

Importance of Sump Pumps & Secondary Units
Sump pumps are the most important part to a waterproof basement. Not only do they collect and remove water from the weeping tile system, they drain and relief subfloor water pressure as well. The pumps are a mechanical device and can fail. We recommend secondary pumps, battery back pumps and high water alarms.

Entry Points for Water
Foundation wall cracks, tie holes and leaky pipe penetrations are also a very common entry point for water. Wall cracks are usually just stress relief or shrinkage cracks and not a significant structural threat to the home. However they are a waterproofing concern and need to be addressed.

Below Grade Windows & Window Wells
Below grade windows and window wells can also be a source for water entry. Window wells create a catch basin for water and must have a working drain. In addition, there needs to be a proper seal on the window installation

Over the Foundation Wall
Another entry point for water can be from over top of the foundation wall. This usually occurs when the exterior grade or landscaping is brought up past the top of the foundation wall and into the framing. This is not only a waterproofing concern, but can cause structural problems when the wood framing begins to rot.

Floor Cracks & Heaving
Basement floor cracks and heaving can be an issue as a result of hydrostatic pressure beneath the floor slab. If the cracking and heaving is too severe, there may be a need to remove and re-pour the floor. In most cases the cracks and be repaired. The key is that the water issue is addressed as well installing proper weeping tile and sump pump systems.