- Buried outside the foundation of the house
- Inside the house, underneath the basement.
What is a French Drain for a Basement French drain is one of the most important steps in basement waterproofing. To make a basement waterproofed a French drain is one of the most commonly used and recommended method. This method prevents the drainage water from damaging the foundation of a building. This basement water proofing method was introduced almost five decades back and due to its positive practical applications is one of the most widely used methods. A basic French drain is a rock and gravel filled trench. In some cases that trench also contains a perforated pipe which channels the ground and surface water away from the basement area. The perforated hollow pipes are placed along the bottom to drain the collected water. To prevent clogging the size of the gravel varies from coarse to fine. The coarse grains are placed in the center and the finest grains are placed in the outermost layer of the trench. For your New Jersey Basement Waterproofing needs, check out All County Waterproofing. Another use of the French drain is to circulate water. They are also used relieve ground water pressure. French drains are installed using two different methods: