Gutters

The term “gutters” can be applied to all roof drains, but “spouting” refers specifically to external gutters.

Types of gutter:

• External gutters – positioned outside the building envelope.
• Concealed Fascia-Gutter Systems – gutters installed directly behind a fascia.
• Internal Gutters – formed inside a parapet wall or where two connected gables meet at an internal draining point.
• Valleys – where two roof planes meet at an angle of less than 180°.
• Roof Gutters – where a penetration obstructs and concentrates the flow of water, often into a single pan.
• Secret Gutters – where a roof discharges into a raked barge.

The definition of gutters in the COP includes the troughs of a profile adjacent to an obstruction (such as a penetration) or where a secret gutter is required, i.e., at the barge line of a swiss gable roof.