When it comes to roof drainage, scuppers are often the unsung heroes. Whether you're working on a commercial roof, balcony, or podium, scuppers offer a simple yet effective solution for removing water from low-lying areas — and preventing costly damage in the process.
In this guide, we break down everything you need to know about scuppers, including the different types available, when to use them, and what sets our range of scuppers apart.
💧 What is a Scupper?
A scupper is a drainage outlet installed in the side of a roof or deck to allow water to exit directly through a wall, rather than relying solely on internal downpipes. Scuppers are particularly useful in flat-roof designs, podium levels, and areas with high rainfall or limited drainage fall.
Unlike internal drains, scuppers are gravity-fed and allow water to flow off the edge of the structure or into a downpipe collector box, reducing the risk of ponding and structural strain.
🔍 When and Where Are Scuppers Used?
Scuppers are commonly used in:
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Commercial and industrial roofs
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Multi-residential balconies
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Green roofs and podium decks
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Water features and planter boxes
They’re especially valuable in situations where space constraints, architectural design, or waterproofing needs make traditional roof drainage difficult or risky.
🛠 Types of Scuppers (and When to Use Them)
1. Standard Scupper Drain
Allproof Scupper Drain
Designed for primary roof or deck drainage, this unit integrates directly into membrane systems using a fully welded flange and is built from stainless steel for corrosion resistance. It connects directly to PVC or HDPE pipework for rapid outflow.
💡 Ideal for:
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Primary drainage points on flat roofs
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Balconies and garden beds
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Integration with sheet membrane systems
2. Scupper Overflow
Allproof Scupper Overflow
Required by building codes to prevent roof flooding, overflow scuppers provide a failsafe when the primary drainage is blocked or overwhelmed. These are typically installed at a higher level than the primary scupper.
💡 Ideal for:
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NCC/BCA compliance (overflow requirement)
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Preventing structural and water damage
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Podium drainage redundancy
✅ Use in tandem with your main scupper drain for code-compliant systems.
3. Stainless Steel Scupper
Allproof Stainless Steel Scupper
With a sleek finish and superior strength, these scuppers are perfect for high-end projects where aesthetics, hygiene, or durability are critical — like hospitals, schools, and architectural builds.
💡 Ideal for:
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Exposed or visible applications
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Projects with strict durability/hygiene specs
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Long-term coastal or corrosive environments
👉 Order Stainless Steel Scuppers Here
🧱 Installation Considerations
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Membrane Integration: Choose a scupper with a wide flange suitable for torch-on or sheet membranes.
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Pipe Compatibility: Ensure connection to the correct pipe type (HDPE, PVC, or stainless).
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Overflow Compliance: Always install secondary overflow points for roofs with only one primary outlet.
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Maintenance Access: Choose models that allow for inspection or flushing, especially in high-leaffall areas.
✅ Why Buy Scuppers from PlumberSupplies.com.au?
At PlumberSupplies.com.au, we offer premium-quality scuppers sourced from trusted brands like Allproof. Whether you're after a simple membrane-integrated scupper or a sleek stainless steel finish, our range is designed for Australian conditions and built to meet BCA requirements.
🛒 Explore our range now:
👉 Shop Scuppers at PlumberSupplies.com.au
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Competitive trade pricing
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Nationwide shipping
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Expert customer support
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Stock ready to go or fast lead times
🧠 Final Thoughts
If you’re designing a drainage system for a balcony, podium, or flat roof, don’t overlook the importance of a quality scupper. They’re cost-effective, easy to install, and often essential for code compliance.
💡 Want help choosing the right scupper? Reach out to our team or explore our collection online.