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  2. Rain gutter - Wikipedia

    en.wikipedia.org/wiki/Rain_gutter

    A roof must be designed with a suitable fall to allow the rainwater to discharge. The water drains into a gutter that is fed into a downpipe. A flat roof should have a watertight surface with a minimum finished fall of 1 in 80. They can drain internally or to an eaves gutter, which has a minimum 1 in 360 fall towards the downpipe.

  3. Cricket (roofing) - Wikipedia

    en.wikipedia.org/wiki/Cricket_(roofing)

    In some cases, a cricket can be used to transition from one roof area to another. On low-slope and flat roofs with parapet walls, crickets are commonly used to divert water to the drainage, against or perpendicular to the main roof slope. The pitch of a cricket is sometimes the same as the rest of the roof, but not always. For Steep-slope roofs ...

  4. Leader head - Wikipedia

    en.wikipedia.org/wiki/Leader_Head

    Copper Leader Head at Penn's Quadrangle, Philadelphia 1894 Copper Leader at Shofuso Japanese House and Garden in Philadelphia. The purpose of a leader head is to help transfer excess water from the roof onto downspouts, thus preventing the gutters from overflowing and water washing over the walls, which is a common occurrence in areas susceptible to heavy rain cycles.

  5. Domestic roof construction - Wikipedia

    en.wikipedia.org/wiki/Domestic_roof_construction

    Section view through a house roof drawing showing names for parts of the structure. [clarification needed] (UK and Australia). Ctrs. means centers, a typical line to which carpenters layout framing. Domestic roof construction is the framing and roof covering which is found on most detached houses in cold and temperate climates. [1]

  6. Rainwater harvesting - Wikipedia

    en.wikipedia.org/wiki/Rainwater_harvesting

    configuration of domestic rainwater harvesting system in Uganda. [1]Rainwater harvesting (RWH) is the collection and storage of rain, rather than allowing it to run off.. Rainwater is collected from a roof-like surface and redirected to a tank, cistern, deep pit (well, shaft, or borehole), aquifer, or a reservoir with percolation, so that it seeps down and restores the ground w

  7. Ponding - Wikipedia

    en.wikipedia.org/wiki/Ponding

    Ponding water accelerates the deterioration of many materials, including seam adhesives in single-ply roof systems, steel equipment supports, and particularly roofing asphalt. On low-slope asphalt roofs, ponding water allows the oil solvent components of the asphalt to leach out and evaporate, leaving the roof membrane brittle and susceptible ...

  8. Drainage divide - Wikipedia

    en.wikipedia.org/wiki/Drainage_divide

    A valley floor divide is a low drainage divide that runs across a valley, sometimes created by deposition or stream capture. Major divides separating rivers that drain to different seas or oceans are continental divides. The term height of land is used in Canada and the United States to refer to a drainage divide. [2]

  9. First flush - Wikipedia

    en.wikipedia.org/wiki/First_flush

    The term "first flush effect" refers to rapid changes in water quality (pollutant concentration or load) that occur after early season rains. Soil and vegetation particles wash into streams; sediments and other accumulated organic particles on the river bed are re-suspended, and dissolved substances from soil and shallow groundwater can be flushed into streams.

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