Flashing and waterproofing are essential processes to ensure the longevity and durability of flat roofs. United Contracting & Roofing LLC in Greenville, SC, offers expert services to properly flash and waterproof lines through flat roofs, preventing leaks and extending the roof’s lifespan.

Rooftop Penetrations

One of the primary challenges in maintaining a flat roof is managing penetrations for electrical lines, refrigerant lines, and ductwork, especially when HVAC units are installed on the roof. These penetrations can cause leaks and ongoing maintenance issues if not properly managed. Here are key considerations:

Designing for Service Life Compatibility

  • When installing a new roof system, it is crucial to compare the service life of the roof with the life expectancy of existing equipment. This ensures that HVAC contractors can perform maintenance and upgrades without compromising the roof’s integrity.

Solutions for Proper Penetration Management

  • Line Shack: This solution allows multiple lines to be flashed watertight while providing easy access for HVAC technicians. It ensures that service work and future modifications can be performed without compromising the roof.

Sealant Pockets

Sealant pockets are a common solution for flashing, but they come with several disadvantages:

  • Service Limitations: Sealant pockets do not facilitate easy service or future system modifications.
  • Durability: While they can be warrantied for up to 20 years, other flashing options offer longer warranties up to 30 years.
  • Complexity: They are complex to install and often improperly executed by untrained contractors.

Properly designed sealant pockets should include a 1-inch gap between pipes and the edges of the pocket to accommodate expansion, contraction, and movement. This prevents leaks and ensures the longevity of the sealant.

“J” Housings

For smaller line penetrations, “J” or candycane-shaped housings are an effective solution. These housings are typically made from PVC or black ABS pipe. However, PVC is less durable due to UV degradation, making ABS a better choice for long-term performance.

Installation Process

Installing penetration management systems requires careful planning and execution. United Contracting & Roofing LLC ensures that all installations are performed to the highest standards:

  • HVAC Coordination: A licensed HVAC contractor is hired to handle the specialty work, including testing HVAC units, recovering refrigerants, and extending electrical lines.
  • Protective Measures: New slip sheets and pressure-treated blocking are installed underneath freestanding units to provide additional protection.
  • Penetration Management: Line shack or “J” housings are installed to ensure watertight and service-friendly penetrations.

Conclusion

Proper flashing and waterproofing of lines through flat roofs are critical for maintaining roof integrity and preventing leaks. By choosing the right penetration management solutions and ensuring professional installation, you can protect your roof and extend its service life. For expert services in flashing and waterproofing, contact United Contracting & Roofing LLC. Their experienced team provides quality solutions to keep your flat roof watertight and trouble-free.If you want to know more about Determining When It’s Time for a Commercial Roof Replacement, click here.