Overflow Scuppers Roofs

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.

Overflow scuppers roofs.

Overflow drains and scuppers roof drainage. 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. 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.

The detail shows an alternate method of constructing either type of scupper. There are different code requirements for scuppers depending on which role they play. Scuppers shall not have an opening dimension of less than 4 inches. On the roof side overflow scuppers can be detailed similar to detail 10 5d.

They are often too small by factors of two or three or more and in the case of overflow scuppers they are often positioned two or three times too high. Prefabricated pitch pans deliver a watertight seal around rooftop protrusions while scuppers provide solutions for drainage challenges. The top of the roof side flange is extended into a masonry joint. This is especially true whenever scuppers are used for primary drains and or overflows.

These metal accessories come with membrane welded to them reducing installation time and providing a clean aesthetically pleasing finish. Discover time off the roof benefits with scuppers and pitch pans from exceptional metals and duro last. Where you have roof drains you are also required to have overflow drains. 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. The scupper is locked and soldered to the closure flange on all sides. Scuppers are rectangular openings in parapet walls that are a minimum of 4 inches in width and height ranging from 4 to 6 inches.