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French drains are typically placed around the exterior of the foundation and are used to divert water from standing or pooling that can cause structural damage. Similar to a roof gutter where rain water is directed to a downspout, French drains manage water at ground level. The simple design consists of a sloped trench filled with gravel and pipe. As rainwater and other surface water soaks into the ground, it is filtered through the gravel into the pipe and channeled through the trench to a collection point away from the foundation.
Occasionally, an existing system may fail, allowing water to infiltrate the foundation. In this instance, an interior French drain system may be installed under the basement floor. The principal is similar to an exterior system with a sloped trench, piping and gravel. The water is re-routed to a sump pump and then transported through pipes to an exterior storm sewer.
Top to Bottom Home Improvement Company LLC installs French drain systems for basement floors and outside gutters.