There are two types of exterior drains. The first, a shallow exterior drain, is excellent for draining wet yards easily, and is inexpensive.
Footing exterior drains run around the outside perimeter of house foundations and are much deeper. Water drains away to a sump pump inside the house or flows away down through a declined pipe. This basement waterproofing option requires removing and replacing landscaping and home structures.
This common basement waterproofing solution is also known as a basement perimeter drain, weeping tile, or sub-surface drain. These interior drains are installed around the edges of the basement floor. The pipe is cut into and laid in between the basement foundation floor and wooden main floor. The drainage pipe allows water to drain behind the wall where it can then be pumped away from the foundation.
These help keep your basement dry and prevent concrete from absorbing excess water. The advantage of completing a project like this is that once the drain is installed, you likely won't need to do any maintenance or replacements.
The perforated pipes allow water seepage and flow in waterlogged areas, to channel excess water away. Water filters down through the gravel, or moisture in the soil seeps in, through the holes, to then be directed away by the pipe. With a downwards slope, gravity will pull the water along as directed.
This makes them an effective water control method for a basement or yard. They are a relatively inexpensive interior or exterior waterproofing solution that works well.
French drains can protect building foundations, lawns and gardens, by clearing groundwater and surface water away, rather than letting the water sit and cause damage. Drainage problems in your yard can lead to flooding, pooling, mould and water damage in your home and garden.
French drains are often installed underground, around the outside edge of a home's foundation walls, or inside and underneath the floor of the basement.