How Do You Handle Roof Penetrations Like Vents or Pipes?

Every roof has penetrations—things like vents, pipes, HVAC curbs, and skylights. These are often the most vulnerable areas for leaks. At L&L Roofing & Construction, we take extra care to properly seal penetrations when installing TPO, PVC, or EPDM single ply roofing systems.

How We Seal Around Penetrations

• Prefabricated Flashings: Factory-made boots designed for pipes and vents are heat-welded (TPO/PVC) or adhered (EPDM) to the membrane for a watertight fit.

• Custom Flashing: For irregular shapes, we hand-fabricate flashing pieces to ensure full coverage.

• Heat-Welded Seams: On TPO and PVC, seams are welded with hot air to create a permanent, watertight bond.

• Termination Bars & Sealants: Used at walls, curbs, or edges for added reinforcement.

• Extra Reinforcement: High-stress areas (like HVAC units) often get additional membrane layers for strength.

Why It Matters

• Prevents leaks in the most common failure points.

• Protects your investment and keeps warranties valid.

• Extends the overall life of the roof system.

FAQ: How Do You Handle Roof Penetrations Like Vents or Pipes?

Q: Are penetrations the most likely spot for leaks?
A: Yes. That’s why proper flashing and sealing are critical in single ply roofing.

Q: Do TPO and PVC handle penetrations differently than EPDM?
A: Yes. TPO and PVC are heat-welded, while EPDM uses adhesive-based flashing. Both methods are effective when installed correctly.

Q: Can penetrations be added after installation?
A: Yes, but they must be flashed and sealed by a professional to avoid voiding the warranty.

Q: Will my warranty cover leaks at penetrations?
A: Yes—if the roof is installed and maintained according to manufacturer standards.

At L&L Roofing & Construction, we believe in doing the right thing—because it’s the right thing. That means paying close attention to the details, especially around penetrations, so your single ply roof performs at its best for decades.

Call us today at (770) 874-0372 for a free single ply roof inspection or consultation in Gainesville and the surrounding areas.