Semco Galvanized Large Flat Roof Jack, Mill Finish 5 in.

The Semco Galvanized Large Flat Roof Jack is a non-tapered, uncapped pipe flashing that protects vulnerable roof penetrations on standard pitch roofs. This listing is the 5 in. mill finish size, sold as one piece; the Semco range spans 4 in. to 24 in. diameters measured from the top of the stack.

Key Features:

• Rust resistant: Made from rust-resistant galvanized material.
• Protects penetrations: Shields vulnerable roof pipe penetrations from water entry.
• Non-tapered design: Non-tapered body with no cap, suited to standard pitch roofs.
• 5 in. diameter: This variant measures 5 in. at the top of the stack.
• Mill finish: Unpainted mill galvanized finish blends with most roofing.

Specifications Table:

Fit and Compatibility:

Fits standard pitch roofs with a pipe stack of the matching 5 in. top-of-stack diameter; Semco’s range covers 4 in. to 24 in. diameters if a different size is needed. Pipe boots and cap accessories, if desired, are sold separately.

Frequently Asked Questions (FAQ):

Q: What is included?
A: One 5 in. mill finish galvanized flat roof jack, sold per piece.

Q: How is diameter measured?
A: Diameter measurements are taken from the top of the stack.

Q: Does it have a cap?
A: No, this is a non-tapered roof jack with no cap.

Q: What roof pitch is it for?
A: It is designed for standard pitch roofs.

Q: Are other diameters available?
A: Yes, the Semco range spans 4 in. to 24 in. diameters.

Q: Will it rust?
A: It is made from rust-resistant galvanized material.

Expert Verdict Reviewed by the SuperArbor Pro Desk

Match the jack’s top-of-stack diameter to your vent pipe, not the pipe’s nominal size, before ordering. Seat the base flange in a bed of roofing cement or sealant and integrate it into the shingle courses above so water sheds over, not under, the flange. For taller stacks or capped applications, confirm a capped model instead.

Seal the flashing properly at the penetration; an unsealed roof jack is a common leak pointwork safely with roof anchors when installing.

Order the Semco 5 in. galvanized large flat roof jack to protect your roof penetrations.