Gibraltar Building Products 4-in x 20-in Galvanized Steel T-Top Vent and Pipe Flashing, RJ4B
SKU: 98449554913

Gibraltar Building Products 4-in x 20-in Galvanized Steel T-Top Vent and Pipe Flashing, RJ4B

Sale price$19.39 Regular price$21.54
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Ships within 48 hours · Estimated delivery Jul 7 - Jul 12

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Description

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.


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.

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

Frequently Asked Questions (FAQ):

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


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


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.


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


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


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.


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

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 98449554913

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4.1 ★★★★★
Based on 478 reviews
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Product Reviews
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Verified Purchase
breya fuentes
Phoenix, US
★★★★★ 5
Pink perfect and easy to mount
Super easy. Just mount the bracket with a small level and the shelf slides on perfect. And has screws to keep shelf from sliding off. Easy to Do and the pink was the perfect color
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
R
Verified Purchase
Rumor
Lowell, US
★★★★★ 4
Good quality, but a few issues with the hidden mounts and levelness.
Size: 35x7 2Pcs, Color: Black, Size: 35x7 2Pcs, Color: Black
These are quite nice and also sturdy. Only complaint I have is that I bought a couple of these, and on one of them, only one of them, it was difficult to get the hidden mounts to go into the holes. I think it was probably a manufacturing defect thing. Also, on that particular one, it wasnt as level as the other. Not a show stopper, but if you need a perfectly level type of mounting situation, I would be careful here.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 14, 2025
N
Verified Purchase
NatKenneally
Houston, US
★★★★★ 5
Great value/easy to install.
Size: 24x6 2Pcs, Color: Black, Size: 24x6 2Pcs, Color: Black
Great product and great value. Easy to install and adds a nice touch to a bathroom.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 21, 2026
B
Verified Purchase
Betty D
Massapequa, US
★★★★★ 5
Easy hanging
Size: 31x7 2Pcs, Color: Black
Great size and easy to hang. Have purchased many for my home.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2026
D
Verified Purchase
David S.
Draper, US
★★★★★ 5
Look great!
Size: 40x7 2Pcs, Color: Black
Love the way these turned out in my office! I connected 3 shelves in a row across the wall to make one long shelf and it looks great!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 16, 2026

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