Robert's All-in-One Install Vent Cap Kit (Black)

The Roberts 4 inch Roof Cap Install Kit is a complete bathroom exhaust vent solution designed for reliable roof ventilation and long-term performance. This all-in-one system includes a 4 inch roof vent cap, a heavy-duty four-layer flexible aluminum duct, and two stainless steel hand-tightening clamps, providing everything needed for a secure and efficient bathroom exhaust fan installation. The roof vent cap features an oversized flange to support proper roof flashing integration and help reduce the risk of roof vent leaks. An integrated backdraft damper helps prevent rain, pests, and outside air from entering the home while maintaining smooth, quiet airflow from bath fan and HVAC exhaust systems. The included four-layer duct combines flame-resistant aluminum and thermoplastic construction for strength, flexibility, and consistent airflow. It routes easily through attic spaces and tight framing conditions without collapsing or restricting ventilation. Two rust-resistant stainless steel clamps create airtight connections without requiring additional tools, helping reduce installation time and prevent disconnected vent hoses. Designed by roofing professionals, this 4 inch bathroom exhaust roof vent system helps prevent moisture buildup, air leaks, and common installation failures that lead to callbacks. Suitable for residential roofing applications, bath fan venting, and general home ventilation projects, the Roberts Roof Cap Install Kit delivers a durable, weather-resistant, and code-conscious solution for dependable exhaust performance.

• Complete 4 inch bathroom exhaust vent kit – Includes Roberts 4 inch roof vent cap, four-layer flexible aluminum duct, and two stainless steel clamps for a full bathroom exhaust vent installation without sourcing extra parts.
• Designed to prevent roof vent leaks and air gaps – Oversized roof flange supports proper flashing integration, helping reduce bathroom vent leaks through the roof and protecting against moisture intrusion and drafts. Heavy-duty flexible duct for attic routing – Four-layer flame-resistant aluminum and thermoplastic ducting bends easily through attic spaces while maintaining strong airflow for bath fan vent and HVAC exhaust applications.
• Integrated backdraft damper for weather protection – Built-in flap helps block rain, pests, and outside air from entering the home, supporting quiet airflow and reliable performance in residential roofing systems.
• Contractor-grade 4 inch roof vent cap system – Engineered by roofing professionals to reduce disconnected vent hoses, prevent callbacks, and provide long-term durability for bathroom exhaust fans and home ventilation projects.