Difference between exterior and interior drains

Exterior French drains are installed around the outside perimeter of a foundation. The drain consists of a flexible perforated drainpipe buried in a trench at the bottom of the foundation footing. Landscape fiber and gravel for manufactured home site prep services are put around the pipe to filter out dirt and sediments.

When water pools around the foundation walls, it enters the pipe and drains away to a sump pump inside the house – or by gravity, but the yard must have a steep incline for the system to easily drain water away.

Installing exterior drainage contractors near me is more troublesome because it involves removing and replacing landscaping, driveways, sidewalks, porches, decks, etc. Another drawback is that maintenance is complicated, involving expensive exterior excavation. The pipe is prone to clogging over time as it’s buried underneath several metres of soil.

An interior French drain also consists of a perforated pipe, but it’s installed around the perimeter of the basement floor. Like exterior drains, the perforated pipe is surrounded by gravel to filter out dirt and sediments. The pipe collects water from the basement wall floor joint as it enters and carries it to a sump pit where a pump removes it away from the foundation.

Moreover, the maintenance of interior drains for site prep services is easier because the pipe is more accessible. Also, the pipe is less prone to clogging because it’s not buried in several metres of dirt. Another plus is that interior systems are protected from the elements, soil conditions or roots growing into the drainage system. Also, they can be installed year-round, no matter the season.

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