Overflow Scuppers Roofs

Where you have roof drains you are also required to have overflow drains.

Overflow scuppers roofs.

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. Discover time off the roof benefits with scuppers and pitch pans from exceptional metals and duro last. 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. Scuppers can also be provided as primary or secondary drainage points.

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. 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. Prefabricated pitch pans deliver a watertight seal around rooftop protrusions while scuppers provide solutions for drainage challenges. Installing overflow drains to the same lines will eliminate flow due to the primary drains constraints.

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. On the roof side overflow scuppers can be detailed similar to detail 10 5d. Scuppers shall not have an opening dimension of less than 4 inches.

In effect these roofs represent nightmares just waiting to play out in real life. Scuppers are rectangular openings in parapet walls that are a minimum of 4 inches in width and height ranging from 4 to 6 inches. Scuppers shall not have an opening dimension of less than 4 inches. 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.

The top of the roof side flange is extended into a masonry joint. The sides of the flange are sealed against the masonry. The scupper is locked and soldered to the closure flange on all sides. Overflow drains and scuppers roof drainage.