Michigan Gutters (O) Maintenance & Alteration Contractor License Exam

What is a French drain and when is it recommended in conjunction with gutter downspouts?

A decorative drain cover only A trench filled with gravel and a perforated pipe that redirects groundwater away from the foundation A drain installed in the gutter channel An underground cistern for collecting rainwater

Correct Answer:

A trench filled with gravel and a perforated pipe that redirects groundwater away from the foundation

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