Gutter and downpipe
In other languages: Υδρορροή · المزراب
The channel and pipe that collect rainwater from a roof and carry it down to the ground or the drains.

Gutters and downpipes carry rain away from the roof: horizontal channels along the edge of a roof and vertical pipes running down to the ground. Flat roofs often have a built-in channel along the parapet that ends in an outlet and a pipe.
A gutter that works properly protects not only the roof but also the walls and foundations. The water needs to end up well away from the foot of the walls, or the ground stays wet and encourages rising damp.
Leaves, soil and nests clog gutters, and then water spills over onto the walls or pools on the roof. Clearing them before and after winter, and checking for rust and open joints, saves a lot of damage.
Where you'll see it
- Quick answersWater pools on my roof after rain. Is that a problem?
- Quick answersAfter rain, water sits on my balcony, mostly by the door. What's wrong?
- Courtyards, Sidewalks and Balconies: A Guide to Outdoor FloorsWhat Goes Wrong with Outdoor Floors
- Courtyards, Sidewalks and Balconies: A Guide to Outdoor FloorsBalconies, Verandas and Falls
- Roof Waterproofing & Insulation: The Complete GuideReading the Warning Signs
- Roof Waterproofing & Insulation: The Complete GuideInsulation, Cost & Maintenance
- Rising Damp: The Complete GuidePrevention & Long-Term Care
Related terms
Floor drainFlat roof (roof terrace)Rising dampFalls (drainage slope)