RoofFlashing

3-4" Combo Roof Flashing

The 3–4” Combo Roof Flashing is designed for reliable performance and easy installation around roof pipe penetrations. It slides over pipes on roof pitches up to 45° and features a rigid black thermoplastic base that resists fading and cracking in harsh weather. A non-fading sealing collar creates a tight seal to help prevent water intrusion while allowing normal expansion and contraction. The flashing is rated for continuous heat up to 180°F, approved for Type B installations, and should not be used with petroleum-based products, which may damage the plastic base or rubber collar.

Benefits

• Slide over the pipe for quick installation on roof pitches up to 45 degrees.
• Rigid black thermoplastic base that resists fading and cracking, for long lasting durability.
• Non-fading sealing collar creates a tight seal around the pipe to help prevent leaks.
• Rated for continuous heat up to 180°F, it seals pipes to prevent leakage.
• Avoid petroleum-based products on the plastic or rubber collar to maintain material integrity.
• Approved for Type B installations, ensuring compatibility with approved venting systems.

 

How To Install

Installed over a 3 inch to 4 inch plumbing vent stack to seal the roof opening. Press fit application, no sealant needed. The flashing will be secured to the roof and shingled around as part of the roofing application. Features a rigid plastic base.

Related Products

Related Products

Standard RoofBoot™ Square Flexible Sleeve

Our Standard RoofBoots feature a flexible square base designed to form a seal on almost any panel configuration and roof pitch, regardless of the pipe location or type of roofing surfaces (including metal, plastic, tile and more).

Specialty Boots

Extreme angles, retrofits, multi-flash, solar, multi-port and more, we have the specialty boots to provide the perfect fit and seal your unique roofing designs. All with great warranties and proven performance.

Box Gutter Expansion Joint

Our “stretch and seal” roof flashing system is ideal for square ducts, chimneys, skylights and more. It joint flashes hi-rib and standing-seam profiles and easily flashes between dissimilar materials with a superior fit and seal.
Additional Resources

ADDITIONAL RESOURCES​​

VENTILATION CALCULATOR​​

Calculate the exact amount of ventilation needed for a well-balanced system.

TECHNICAL TOOLS​​

Dive deep into product sheets, diagrams, and full spec breakdowns. 

Roofing FAQ

Learn everything you need to know about ventilation.

Marco Industries