Apr 1, 2025 · In addition, overflow scuppers must be sized with a minimum opening height of 4 inches (102 mm) and have an opening area at least three times that of the roof drains. The …

Description: Scuppers are used to provide an outlet through parapet walls or gravel stops on flat and built-up roofs to allow drainage of excess water. They can be used in conjunction with …

Oct 28, 2009 · Where you must drain through the wall with a scupper the overflow must be three times the required size of the roof drain and have a minimum height of 4″ and again be …

Jul 20, 2024 · Roof scuppers effectively drain rainwater and melting snow from the roof surface. In flat or low-sloped roofs, water tends to pool and needs an efficient drainage system to prevent …

Aug 22, 2020 · Where roof drains are required, secondary (emergency overflow) roof drains or scuppers shall be provided where the roof perimeter construction extends above the roof in …

Sep 29, 2021 · So, roof scuppers are defined as the drainage to your roof system as it allows the water runoff from the roof through the parapet wall or metal edge. This guide provides you with …

Overflow scuppers for flat roofs support primary drains when they are overwhelmed. You can see them on large residential properties that experience seasonal storms or high rainfall. Closed …

Oct 22, 2024 · Overflow scuppers serve as a secondary drainage system, providing an outlet for water if the primary system is overwhelmed. Positioned higher on the parapet wall or roof …

Oct 22, 2020 · At one time an overflow scupper was required to be 3 times the area of the primary drain. I size scuppers based on the scupper being clogged (with branches, leaves, & other …

Jul 2, 2024 · There are also angle scupper designs, which direct water flow from the roof at a particular angle, typically to a downspout or a designated drainage area. Additionally, some …

Jun 27, 2023 · When the primary scupper drains become overwhelmed by heavy rainfall or obstructed, overflow scupper drains serve as backup drainage systems. They keep water off …

Nov 8, 2011 · The scuppers can serve as overflow drainage — where the scupper is elevated above the deck a minimum of 2 inches — or as primary drainage — where the scupper is flush …

Jul 23, 2020 · Overflow drainage scuppers are typically holes with no downspout or other intricate designs. This is because these scuppers are specifically designed to remove water when there …

Installing scuppers is a relatively affordable and straightforward method of enhancing your roof’s drainage system. Unlike internal drainage systems, scuppers do not require extensive …