Overflow Scuppers Roofs

The detail shows an alternate method of constructing either type of scupper.

Overflow scuppers roofs.

Scuppers can also be provided as primary or secondary drainage points. Installing overflow drains to the same lines will eliminate flow due to the primary drains constraints. In effect these roofs represent nightmares just waiting to play out in real life. When scuppers are used for secondary emergency overflow roof drainage the quantity size location and inlet elevation of the scuppers shall be sized to prevent the depth of ponding water from exceeding that for which the roof was designed as determined by section 1611 1.

Discover time off the roof benefits with scuppers and pitch pans from exceptional metals and duro last. Prefabricated pitch pans deliver a watertight seal around rooftop protrusions while scuppers provide solutions for drainage challenges. Overflow drains and scuppers roof drainage. The top of the roof side flange is extended into a masonry joint.

Scuppers shall not have an opening dimension of less than 4 inches. Flat roofs that do not drain over the roof edge and roofs that have parapet walls must utilize roof drains to get the water off the roof. The scupper is locked and soldered to the closure flange on all sides. In short a scupper is a detail that provides drainage to a roof system by allowing the water runoff from the roof to exit the roof through a metal edge parapet wall or through the deck into a downspout or leader not run through the interior of the building.

These metal accessories come with membrane welded to them reducing installation time and providing a clean aesthetically pleasing finish. Scuppers are rectangular openings in parapet walls that are a minimum of 4 inches in width and height ranging from 4 to 6 inches. The sides of the flange are sealed against the masonry. On the roof side overflow scuppers can be detailed similar to detail 10 5d.

When scuppers are used for secondary emergency overflow roof drainage the quantity size location and inlet elevation of the scuppers shall be sized to prevent the depth of ponding water from exceeding that for which the roof was designed as determined by section 1611 1. An overflow drainage system will be designed to function independently of the primary system to drain water from the roof if the primary drains or scuppers become blocked and to prevent overloading of the roof. This is especially true whenever scuppers are used for primary drains and or overflows. There are different code requirements for scuppers depending on which role they play.