How Do You Handle Drains and Scuppers in This System?

Drains and scuppers are critical parts of a flat or low-slope roof—they control how water leaves the roof. In a modified bitumen roofing system, these details require careful workmanship to avoid leaks and ponding. At L&L Roofing & Construction, we use proven methods to make sure your roof drains water properly and stays watertight.

How We Handle Drains

• Integrated Flashing: Modified bitumen plies are sealed directly to drain bowls with adhesives or torch application.

• Clamping Rings: Secure the membrane in place and provide extra protection against leaks.

• Reinforced Layers: Extra plies of material strengthen the area around drains.

• Slope to Drain: We ensure water flows toward drains, sometimes using tapered insulation.

How We Handle Scuppers

• Metal Scuppers: Installed through parapet walls to let water exit the roof.

• Sealed Connections: Modified bitumen membranes are heat-welded or adhered to scupper boxes and flanges.

• Overflow Protection: Secondary scuppers are often installed as backups in case primary drains clog.

• Durability: Metal scuppers are reinforced with flashing and sealants to resist leaks.

Why It Matters

• Prevents ponding water that can damage the membrane.

• Protects the building from leaks at vulnerable drainage points.

• Ensures compliance with code and warranty requirements.

FAQ: How Do You Handle Drains and Scuppers in Modified Bitumen Roofing?

Q: Are drains more reliable than scuppers?
A: Both work well when installed correctly. Many roofs use a combination for added protection.

Q: Can clogged drains cause roof failure?
A: Yes. That’s why regular maintenance to keep drains and scuppers clear is essential.

Q: Do drains and scuppers need reinforcement?
A: Absolutely. We add extra plies and sealants because these are high-stress areas.

Q: Can existing drains be reused with a new roof?
A: Sometimes. If they’re in good condition, we integrate them into the new system. If not, we replace them during installation.

At L&L Roofing & Construction, we believe in honesty, integrity, and doing the right thing. That means paying close attention to drains and scuppers—because even the best roof won’t last without proper water management.

Call us today at (770) 874-0372 to schedule a consultation and see how we can protect your Gainesville property with a properly installed modified bitumen roofing system.