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Roof Scupper: What It Is, How It Works & More

Welcome, property owners and business managers, to your crash course on roof scuppers! Whether you’re a seasoned property owner or just diving into the world of building management, understanding the ins and outs of roof scuppers is crucial. These unassuming components play a significant role in maintaining the integrity of your property and keeping it safe from water damage. So, let’s unravel the mystery behind roof scuppers and discover how they work their magic.

Inside this blog:

  • An overview of how roof scuppers work
  • 4 key benefits of roof scuppers
  • How to properly maintain your roof scuppers

Keep reading to learn everything you need to know about roof scuppers so you can protect your investment from water damage and extend your roof’s lifespan!

🤔 What Exactly is a Roof Scupper?


Imagine rainwater pouring down your building’s roof during a storm. Without a proper drainage system, that water would accumulate, leading to potential leaks, structural damage, and even mold growth. This is where roof scuppers come into play.

In simple terms, a roof scupper is a specially designed opening or outlet located on the edge of a roof or parapet wall. Its primary function is to redirect rainwater away from the building, preventing it from pooling on the roof surface and causing damage.

🛠️ How Do Roof Scuppers Work?

Understanding the mechanics of roof scuppers is like uncovering the secrets of a well-oiled machine. Here’s a breakdown of how they work:


When rain falls on your building’s roof, it doesn’t just vanish—it needs somewhere to go. That’s where the collection comes in! Picture your roof as a tilted surface, gently guiding rainwater towards its lowest point, much like a slide leading to a puddle. Instead of letting the water sit there and potentially cause trouble, we give it a purposeful path to follow.


Once the rainwater reaches the edge of the roof, it’s time for it to make a graceful entrance into the world of roof scuppers. These scuppers aren’t just holes in your building; they’re openings designed specifically for rainwater. Think of them as doors welcoming guests to a party. As the rainwater arrives, it slips through these openings, eager to begin its journey to a new destination.


Now that the rainwater has made its grand entrance, it’s time for it to embark on a journey through the world of roof scuppers. Inside the scupper, the water finds itself in a special channel or pipe, like a passenger on a train headed to its next stop. This channel ensures the water stays on track, guiding it safely away from the roof’s surface. It’s like a helpful hand guiding you through a crowded room!


After its journey through the scupper, our rainwater friend has reached its final destination: the exit. Here, it bids farewell to the building and begins a new adventure down a downspout or drainpipe. It’s like saying goodbye to a friend at the end of a party—you wish them well on their way.

By exiting the building, the rainwater leaves behind the risk of damage and instead finds itself on a path to join other rainwater friends on the ground below.

4 Benefits of Roof Scuppers

Now that we know what roof scuppers are and how they operate, let’s explore some of the benefits they offer:

1. Prevents Water Damage

Imagine your building as a fortress, protecting everything inside from the elements. But even the sturdiest fortress can be breached by water. That’s where scuppers come in, acting as guards against the rain. By whisking rainwater away from the roof, they ensure that your property remains strong and impervious to water damage.

2. Reduces Maintenance Costs

Maintaining a building can sometimes feel like trying to plug leaks in a sinking ship. But with scuppers on your side, the task becomes much simpler and more affordable. Instead of spending a fortune patching up water damage, you can invest a fraction of that cost in regular scupper maintenance.

3. Protects Against Mold and Mildew


Mold and mildew are like silent invaders, creeping into your building when you least expect it. But with proper drainage provided by scuppers, you can keep these unwelcome guests at bay. By swiftly removing excess moisture from your roof, scuppers deprive mold and mildew of the damp environment they need to thrive.

4. Preserves Roof Lifespan

Scuppers keep your roof dry and extend its lifespan. By preventing water from pooling on the roof’s surface, roof scuppers ensure that your building remains strong and resilient, saving you from the costly headache of premature roof replacements.

Types of Roof Scuppers

Roof scuppers come in various shapes, sizes, and materials to suit different building designs and drainage needs. Here are some common types:

  • Box Scuppers: These are rectangular-shaped scuppers typically installed along the edge of flat or low-slope roofs.
  • Crimped Scuppers: Crimped scuppers feature a folded edge, providing additional strength and stability.
  • Overflow Scuppers: Designed to prevent water buildup during heavy rainfall, overflow scuppers act as emergency outlets.
  • Custom Scuppers: For unique architectural designs or specific drainage requirements, custom scuppers can be fabricated to meet your needs.

Maintaining Your Roof Scuppers

Like any other component of your building’s exterior, roof scuppers require regular maintenance to ensure optimal performance. Here are some tips to keep them in top condition:

  • Inspect Regularly: Schedule routine inspections to check for any signs of damage, blockages, or corrosion.
  • Clear Debris: Remove leaves, twigs, and other debris from the scupper and downspouts to prevent clogs.
  • Check Seals and Joints: Ensure that seals and joints are intact to prevent leaks.
  • Trim Surrounding Vegetation: Trim overhanging branches or foliage that could obstruct water flow to the scuppers.
  • Professional Cleaning: Consider hiring professionals for thorough cleaning and maintenance, especially in hard-to-reach areas.

Keep Your Property High and Dry with Roof Scuppers

In the world of building maintenance and management, every component plays a vital role in ensuring the longevity and safety of your property. Roof scuppers may seem inconspicuous, but their importance cannot be overstated. By understanding what roof scuppers are, how they work, and how to maintain them, you can protect your investment and safeguard against water damage. So, here’s to keeping your property high and dry with the help of reliable roof scuppers! 

Contact our team of expert contractors at Kornerstone Roofing today and we’ll answer any questions you have about your next roofing project. We guarantee you’ll get responsive communication and top tier results when you work with our roofers!

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