Interior basement systems often include the installation of a French drain and a sump pump. The drain works to help relieve hydrostatic pressure that may build up against the walls and floor of your foundation. These drains guide water away from the foundation wall and floor into a well. The water is then pumped out of the well by a sump pump.

While some people will argue that interior systems still allow water into the basement and therefore are essentially about managing water rather than waterproofing, there are various instances where these systems are a better option to exterior waterproofing.

1. If you have drainage issues: If your land has issues with drainage, then you will need a way to reduce the hydrostatic pressure against the foundation wall. An interior drain will help to guide water away from the wall and therefore not only prevent seepage, but also bowing of your foundation wall.
2. When you want to save money: If you want to save as much money as you can and still ensure that your basement remains dry, you should opt for interior waterproofing. Having these systems installed is often cheaper than exterior waterproofing systems.
3. There isn’t enough space: If your foundation wall is too close to the perimeter of your property, you should consider waterproofing from the interior. This will ensure that you do not interfere with your neighbor’s property. You can keep the peace and still ensure a dry basement.
4. If you want to save your landscaping: If you’ve invested a fortune to achieve curb appeal, you may not want to have the landscaping ruined by excavation works. You can avoid excavation of your landscape by having the drain installed inside the basement. Your landscape will remain safe.