## What is a scupper on roof?

This drainage system looks like an opening in the parapet or wall of your flat commercial roof. Some scuppers have a simple spout that pours water down the side of your building, while others are connected to downspouts that send the water directly to the ground level.

## How far apart should scuppers be?

10 feet apart
Scuppers should be spaced no greater than 10 feet apart depending on the roof area drained.

How do you size a roof scupper?

Roof Scupper Size The only unconditional guideline for scupper sizing provided by the code is that “scupper openings shall be not less than 4 inches (102 mm) in height and have a width that is equal to or greater than the circumference of a roof drain sized for the same roof area.”

### How does a roof scupper work?

A roof scupper is a drainage system for flat roofs that can’t rely on sloping to naturally move water through a gutter system. Scuppers are essentially small devices that work by giving the water a mechanism through which it can escape the roof without passing through the interior of the building.

### How many GPM can a 4 drain handle?

STEP 3: Choose the number of drainage zones.

Pipe Size Maximum Flow Capacity
3″ 44.0 GPM
4″ 75.0 GPM
6″ 175.0 GPM

How do I calculate roof drainage?

Take the roof’s total square footage and divide by the total square footage handled by one drain. The result is the number of drains needed. For example: 50,000 / 4,400 = 11.36; or 12 drains required.

#### What are roof drains called?

Many people ask, “What are roof drains called?” and they are simply called roof drainage systems. The drainage system starts at the roof line and then you have roof drainage to ground. The components that you need for a roof drainage system is a gutter system and downspout.

#### What are scuppers in construction?

Scuppers are very problematical in construction. If not properly designed and isntalled they can serve as a conduit for water to get into a building as much as to get off of a building. Scuppers are those small openings in exterior walls that allow water from roofs or decks to drain off through a guard wall or parapet.

What is a scupper in architecture?

A scupper, in architectural terms, is not some name for a lowly pirate, but rather a device to get water off a roof and away from a building . Most typically found on flat roof buildings, scuppers project out from the sidewall of a building at roof level and allow rainwater and snow melt to flow not just off the roof, but hopefully also away from the edge of the building.

## What does scupper mean?

Definition of scupper. (Entry 1 of 2) 1 : an opening cut through the bulwarks of a ship so that water falling on deck may flow overboard. 2 : an opening in the wall of a building through which water can drain from a floor or flat roof. scupper.

## What is a scupper vent?

Scupper vents, which use pressure to restrict airflow, are one of the most popular methods to reduce dust ingress into a caravan. The theory behind it is that if you put a vent in the roof of your caravan and leave it open as you drive on dusty roads, the variation in pressure between the inside of your van and the outside world will stop dust from entering.