TRI-BUILT 4 in. Galvanized Steel T-Top Roof Jack Flashing Base

This TRI-BUILT T-Top is a galvanized roof jack flashing base with a 4 in. diameter for flat shingle installations. Sold as a single piece, it forms the base of a roof jack assembly over vent pipes. Pair it with the matching T-top cap and pipe size in the TRI-BUILT roof jack line.

Key Features:

• Galvanized construction: Galvanized steel construction resists weathering at the pipe penetration.
• 4 in. diameter: Sized for a 4 in. pipe diameter.
• Flat shingle base: Flat base (FHA) style designed for shingle roof installations.
• Roof jack component: Functions as the base element of a T-top roof jack assembly.
• Single piece unit: Sold by the piece; one base per unit.

Specifications Table:

Fit and Compatibility:

Designed as part of a T-top roof jack assembly for 4 in. pipes on shingle roofs; matching TRI-BUILT T-top caps and other diameters are available in the line. Confirm pipe diameter before ordering.

Frequently Asked Questions (FAQ):

Q: What is included?
A: One 4 in. galvanized T-top roof jack flashing base, sold as a single piece.

Q: What pipe size does it fit?
A: It has a 4 in. diameter.

Q: What is a T-top used for?
A: It is the base component of a roof jack assembly that flashes a vent pipe penetration.

Q: What material is it?
A: Galvanized steel.

Q: Are other sizes available?
A: The TRI-BUILT T-top line includes other diameters, including a 7 in. version.

Expert Verdict Reviewed by the SuperArbor Pro Desk

Verify the vent pipe diameter before ordering so the T-top slips over the pipe cleanly. Set the flat base into the shingle courses with the uphill side lapped above the flashing so runoff sheds around the penetration. Combine with the matching T-top cap for a complete roof jack assembly, and follow the manufacturer’s installation instructions and local code.

Use proper fall protection and OSHA-compliant practices when working on a roof.

Order the TRI-BUILT 4 in. galvanized T-top roof jack base for dependable vent pipe flashing.