Drains for below-grade garages

Exterior · Garages and Carports · printed page 336 (PDF page 337)

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Book index entries

Below Grade Garages – Drains Drainage – for Below-grade Garages Garage – Below-grade – Drains

Text in the illustration

house above
floor framing
garage
common problem:
drain heaves or driveway settles and water ponds around drain
ponding water
drain
asphalt
gravel
drainage
driveway
garage floor
drain to storm sewer
drain is ideally full garage width
drainage tile and garage door not shown
cross section

Generated explanation

The cross section depicts a below-grade garage beneath a house, with a grated drain at the junction of the garage floor and the sloping driveway. Arrows show drainage toward the inlet from both the garage floor and driveway, and an outlet pipe is labeled as draining to the storm sewer. The drawing notes that the drain ideally extends the full garage width and that drainage tile and the garage door are not shown. An enlarged detail illustrates a common failure condition in which the drain heaves or the driveway settles, leaving water ponding beside the elevated grate.