How To Replace A Roof Scupper

How To Replace A Roof Scupper
  • Author: Amanda Arnold
  • Posted On: July 7, 2022
  • Updated On: August 21, 2023

Roof scuppers are important since they are considered the drainage system for flat roofs. It’s because flat roofs are independent of the conventional gutter system.

Roof scuppers are sometimes referred to as drainage systems to allow water to drain from your roof system since they allow water to exit the roof through the parapet wall or metal edge.

The roof scupper does not offer any water protection. When an external drainage system cannot be established, you shouldn’t install them. On the other side, a roof drain offers you water protection because it stops water from seeping.

Roof Scuppers Work Approach

You must consider the significance of roof scuppers and why a flat roof needs one. By demonstrating how roof scuppers function, it is possible to demonstrate why they are necessary and significant.

Roof scuppers are necessary on flat roofs to drain water from the roof. Water may accumulate on the roof as a result of rain. Draining this water is necessary to prevent damage to your roof. Water cannot be automatically evacuated from flat roofs due to its design. Roof scuppers are installed because of this.

What Are The Main Reasons To Replace A Roof Scupper?

Roof scuppers have a relatively straightforward operating principle since water drains directly outdoors from the roof or passes through your home’s interior. Your roof may leak if the scupper becomes blocked since it will not let water pass through it.

Inappropriate Installation Of Ladder Headers

If a leader header is clogged with debris, the leader header will detach from the wall, causing water to run down the wall rather than overflowing the rim. Leader headers and scuppers must cooperate. This was the issue that was plaguing the scupper’s exterior wall.

Uncleaned Scupper Filters

The strainer or filter in the leader header’s neck clogs up quickly with minute particles of debris. As a result, water recirculates via the scupper and onto the flat roof. The leader header addition created additional issues.

It is crucial to install a strainer at the scupper’s mouth since a leader header directs all of the water into a drain pipe. Small material should pass through strainers without being stopped by twigs and leaves.

Inappropriately Attached Flashing

The flashing over the scupper is not securely fastened to the wall. Leaks result from this too. The flashing on the stucco wall is not properly sealing. The flashing is not properly sealing against the stucco wall. Water will seep within the structure when a strong downpour hits the wall.

Check the area more closely to see if there is a leaky area where the light is flashing. The cement block cracked as a result of deteriorating stucco on the wall.

Steps To Repair Or Replace Scupper

A Pitch Pocket is one of the most neglected components of flat roofs. Pitch Pockets are open-bottom-flanged storage containers typically installed on roofs close to air conditioners. To create a watertight barrier, these Pitch Pockets must also be filled and sealed around the cables and pipes.

The Pitch Pocket’s tar has frequently dried out and split, causing roof leaks. Every two years, you should have it checked. Water may assemble and spill into the sides of the Pitch Pocket’s divided material.

Once you have covered the issues of the pitch pocket, its time to repair or replace your scupper by following these steps;

  • Install new leader headers.
  • Keep leader headers safe by installing a rubber membrane gasket around them.
  • Use tar or sealant to seal the flashing.
  • Fill the gaps with caulk, sealant or rubber membrane according to the size of each gap or crack.
  • Go for customized and large strainers according to the size of the scupper.

What Are The Other Tips To Keep Scuppers Well-Maintained?

After a significant downpour, flat roofs may accumulate water. So that this doesn’t happen, it is crucial to have a suitable drainage system. The proper drainage off of your flat roof can be achieved by installing a roof scupper.

You might sustain roof damage if the drainage system becomes clogged. The roof should be examined for puddles and blocked drainage. Ensure no nests are being built by birds or rodents, check the roof’s pipes, and ensure the vent is not clogged.

Ensure no one obstructs the vent or the pipe corrosion before continuing. It would help if you spoke with certified roofing professional about roofing matters. It would be more time and effort-consuming to install a scupper on a flat roof yourself than you think.

Additionally, you’ll want to ensure that the state’s numerous construction and roofing codes are adhered to. Therefore, you should speak with a certified roofing contractor for your safety and that of your house.


When a flat roof leaks, it is frequently simple to determine that it needs to be repaired. Installing a roof scupper would be the best option in this situation. Furthermore, ensuring that the drainage system is connected properly will prevent leaks on your flat roof.

A roof scupper can be cleaned by brushing away all the dirt, junk, and weeds. Wearing gloves will allow you to clean it with your hands as well. Additionally, you can clean it by forcing water under pressure via the roof scupper, clearing off all the debris.

Roof scuppers are most advantageous since they are more affordable than other roof drainage methods. Wide in size and simple to install and maintain, roof scuppers are a good choice.

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Author: Amanda Arnold

Amanda has been working with ConstructionHow since 2021. Her experience spans over 5 years in the creative niche such as home decor and trends, landscaping, renovations, and custom architectural values. As a home designer expert, she has a keen eye for the latest home improvement trends with accurate facts that readers find impossible to ignore. Being invested in home-building trends is how she has gained her lucrative expertise exploring more to bring a positive ambiance for all homeowners (and even tenants!). Currently, she lives in a beautiful beach home, a source of fascination for her.