Property question
Channel drain
French drain
What shape does the water follow?
A visible sheet or band of runoff crosses a driveway, patio, walkway, paver field, or threshold edge.
A broad strip of soil remains wet, or water moves through saturated ground rather than only across the surface.
Where does water enter?
Through a removable grate along a continuous surface collection line.
Through stone and filter fabric into a perforated pipe along a subsurface collection trench.
What surface is being treated?
Usually hardscape where the surrounding finish can slope toward the channel.
Usually lawn, planting bed, or another soil area where an excavated collection zone can intercept water.
What must the scope explain?
Channel location, grate and load context, transitions, connected solid pipe, access for cleaning, and the outlet.
Trench location, stone and fabric, perforated collection pipe, solid conveyance where needed, cleanouts, and the outlet.
What maintenance remains visible?
Leaves, mulch, sand, and sediment on the grate or inside the channel; removable sections and pipe access matter.
Accessible inlets, cleanouts, stone condition, settlement, roots, sediment, and outlet flow should be reviewable where the layout allows.
What can change the answer?
Hardscape elevations, flow direction, threshold risk, traffic or load conditions, available depth, pipe route, and discharge location.
Water source, soil behavior, trench depth, utilities, roots, available fall, route length, outlet condition, and nearby hardscape.