A basement waterproofing system keeps water from entering a basement, but the system can only be effective if it is installed properly and professionally. There are a variety of components to a complete basement waterproofing system.
Interior Basement Drainage
6 Locations Your Basement Leaks
1. Floor/Wall Joint Floor/wall joint is also known as the cold joint, the floor/wall joint is the most common entry source of water entering a basement. This area is where the foundation wall meets the basement floor. The water comes in from the outside over the footing under the foundation wall and up through the intersection where the basement floor and foundation wall meet. This type of wall seepage is seen most of the time when it rains. If you have 3 to 4” or more of water in your basement, the source of the water is most likely from the floor/wall joint. Water can seep in from other locations as well, yet the most heavy water entrance will be from the floor/wall joint.
2. Basement Floor Cracks Water does not enter into the basement without having a visible crack, breaks or seams. Concrete does not “leak”. Unless there is a visible floor crack in the poured floor, the water can enter from underneath the slab floor, through visible cracks.
3. Basement Windows It is not uncommon for basement windows to be below the grade of the lawn. Rain runoff can penetrate windows and leak down the wall onto the floor.
4. Bulkheads It is not uncommon for some homes to have an entrance into the basement from the outside yard. It is typical in this case to build three walls protruding from the primary foundation wall and installing stairs to and from the basement as well as a cover for access. This area can be a large source of water entrance. There are many different types of bulkheads and bulkhead styles and the best solution for water entering is to stop the water from getting onto the floor of the basement.
5. Sill Plate This is the section of where the wood framing sits on top of the foundation wall. This area can let water enter depending on the grade of the lawn. If a house is located at the base of a hill, water will flow down and pool at the foundation. If this happens, water can come in over the foundation wall and underneath the sill plate.
6. Wall Cracks As foundations settle the walls can crack and leak in water from what is called the "bowl effect" most homes have.