A perimeter drain can prevent the headache and worry of how safe your crawlspace or basement is during a rain storm, and truly give you peace of mind that your house and belongings are secure. If your system is not working properly, or worse, you do not have a system, you are going to end up with a wet basement/crawl space. A perimeter drain is a drainage system that is designed to prevent water from seeping into your basement. It carries the water accumulated from heavy rainfall or melting snow, away from your foundation, keeping your basement or crawl space dry.
How do perimeter drains work?The foundation around your house is excavated and perforated pipe is placed around the perimeter of your house. The tiny holes in the pipe allow water to enter the pipe, and be drained away from your home’s foundation. The pipe is covered by gravel, and the trench is then backfilled with soil. The gravel allows the water to flow towards the drainage pipe, without allowing dirt and debris to clog the pipe. The pipe is sloped away from the home, and carries the water to a discharge station. On your homes foundation a waterproof membrane, generally black tar, is installed. When it rains, the water will hit this membrane, which acts as a foundation waterproofing. As the water table rises, the water enters the perforated pipe, and flows to the lowest point of the system, and to its discharge station.
Indicators that there is a problem with your current drainage system
- Your basement or crawl space is flooded
- There are puddles close to your home’s foundation (This is a sign that your yard is not properly sloped away from your home, or that your downspouts are not directing roof water far enough away)
- You have water stains on your basement walls. (Serious flooding can happen if this is not remedied).
- Musty smelling basement from water damage