Gibraltar Building Products 4-in x 20-in Galvanized Steel T-Top Vent and Pipe Flashing, RJ4B4 in Galvanized T Top Vent & Pipe Flashing Durable T top vent and pipe flashing built from professional grade 26 gauge bonderized galvanized steel. Designed for 4 in exhaust pipes, its paint ready to blend with roofing and suited for residential or commercial installations. Key Features: Professional 26 Gauge Steel: Bonderized galvanized construction delivers long lasting weather resistance. Paint Ready Finish: Pre primed surface allows easy painting

4-in Galvanized T-Top Vent & Pipe Flashing

Durable T-top vent and pipe flashing built from professional-grade 26-gauge bonderized galvanized steel. Designed for 4-in exhaust pipes, it’s paint-ready to blend with roofing and suited for residential or commercial installations.

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Key Features:

• Professional 26-Gauge Steel: Bonderized galvanized construction delivers long-lasting weather resistance.
• Paint-Ready Finish: Pre-primed surface allows easy painting to match shingles and trim.
• Optimized for 4-in Pipes: 4-in diameter opening with low-profile T-top disperses exhaust evenly.
• Easy Roof Integration: Large base flange installs under shingles for a watertight seal.
• Versatile Application: Suitable for bath, dryer, kitchen and other roof exhaust terminations.

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Specifications Table:

Specification	Details
Fits Pipe Size	4 in diameter opening
Material	Bonderized galvanized steel, 26-gauge
Color/Finish	Gray; paint-ready (pre-primed)
Base Dimensions	Approximately 19 in x 15 in (retailer lists 20 in L x 16 in W)
Maximum Temperature	180°F
Use	Roof exhaust termination for bath, dryer, kitchen or other ducts
Design	Low-profile T-top with half-dome shield to distribute exhaust
Warranty	None
UNSPSC	30151600
California Prop 65 Warning	Yes

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Frequently Asked Questions (FAQ):

Q: What pipe size does this flashing fit?
A: It is designed for 4-in diameter exhaust pipes.

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Q: Can I paint the vent to match my roof?
A: Yes, it’s bonderized and pre-primed, so it’s ready to paint.

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Q: What are the base dimensions?
A: Listed as approximately 19 in x 15 in on the spec sheet; Lowe’s also lists 20 in length and 16 in width.

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Q: What temperatures can it handle?
A: Rated up to 180°F according to retailer specifications.

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Q: Is it for residential or commercial roofs?
A: It’s suitable for both residential and commercial use.

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A Clean, Low-Profile Roof Detail

This T-top vent creates a crisp, architectural punctuation on the roofline while keeping the profile discreet. The bonderized steel surface takes paint beautifully, letting you blend or contrast with shingles for a tailored finish. Pair it with a monochrome roof palette for a streamlined silhouette that feels intentional. It’s a small upgrade that elevates curb appeal with quiet sophistication.

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Choose this paint-ready, 26-gauge galvanized T-top flashing to finish your 4-in roof exhaust with durable, low-profile performance.