Feb 5, 2025 · Overflow roof scuppers will let the water run freely (and visibly) down the side of the building. In many cases, overflow scuppers are a code requirement; they serve as an …

Mar 10, 2024 · Supplementing existing scuppers with overflow scuppers can provide backup drainage during heavy rainfall or in cases of blockages, ensuring continuous water evacuation.

at a reasonable depth of 3.5 inches, you need a 28 inch wide scupper. In other words, an equal flow rate through a scupper when compared to a vertical drain will require a much larger …

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 …

Oct 28, 2009 · Where you can drain over the wall, the overflow drain must be at least the same size as the regular drain and located no more than 2″ above the low point of the roof. Where …

Aug 22, 2020 · The installation and sizing of secondary emergency overflow drains, leaders and conductors shall comply with Chapter 11 of the California Plumbing Code. CRC R903.4.1 …

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 gutters and …

Sep 29, 2021 · In case of overflow scuppers, they must be positioned two or three times higher than the usual. The height of a roof scupper must be at least ten feet depending upon the area …

Aug 26, 2024 · Whether building from the ground up or planning on re-roofing, Menzies has overflow scupper drains to help ensure your roof complies with the latest codes, regulations, …

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 …

Mar 15, 2024 · It's all thanks to the roof scupper. An important factor in maintaining effective water drainage, the scupper is a must-have for flat or low-slope roofs. And don't you forget, it's also …

Dec 30, 2024 · Overflow Scuppers. Overflow scuppers act as a backup drainage system. Also known as emergency roof scuppers, these are installed slightly higher on the roof walls, …

Oct 22, 2020 · I size scuppers based on the scupper being clogged (with branches, leaves, & other debris) up to the maximum ponding depth the roof is designed for (4" for a 20 PSF roof …

Jul 2, 2024 · How does a roof scupper work? A roof scupper functions as an outlet in parapet walls or gravel stops on flat and built-up roofs, enabling the drainage of surplus water and …

Jul 20, 2024 · A roof scupper is an opening in the parapet wall, edge of the roof, or a raised portion of the roof that allows water to drain off the surface. Unlike internal drains which carry …

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 …

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 …

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 …

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 …

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 …