Cor-A-Vent V300 7 in. x 4 ft. Ridge Vent

This is a Cor-A-Vent V300 ridge vent, 7 inches wide by 4 feet long per piece, delivering 13.5 sq. in. of net free vent area per lineal foot. Sold one piece per order, with 12 pieces per box. Use it along the ridge of shingle roofs as the exhaust component of a balanced attic ventilation system.

Key Features:

• 13.5 sq. in. NFVA: Provides 13.5 sq. in. net free vent area per lineal foot.
• 7-inch width: 7 in. wide by 4 ft long pieces for standard ridge applications.
• Lightweight: About 1 lb per 4-ft piece for fast handling on the roof.
• Boxed 12 pieces: 12 pieces per box and carton for whole-roof jobs.
• Proven V300 series: A widely used ridge vent profile in the Cor-A-Vent lineup.

Specifications Table:

Coverage & How Much You Need:

One piece spans 4 lineal feet of ridge with 13.5 sq. in. NFVA per foot. Calculate required exhaust NFVA for the attic area, divide by 13.5 for the needed run, then divide by 4 ft to order pieces.

Fit and Compatibility:

Fits under standard ridge cap shingles and pairs with Cor-A-Vent intake products such as vented drip edge for a balanced system. Intake vents and fasteners are sold separately.

Frequently Asked Questions (FAQ):

Q: What size is each piece?
A: Each piece is 7 inches wide by 4 feet long.

Q: What is the net free vent area?
A: 13.5 sq. in. per lineal foot.

Q: How many pieces per box?
A: 12 pieces per box and 12 per carton; each order unit is one piece.

Q: Does it include intake venting?
A: No, it is exhaust venting only; pair it with a separate intake product for balanced ventilation.

Expert Verdict Reviewed by the SuperArbor Pro Desk

Size ridge vent length so exhaust NFVA matches or slightly exceeds intake NFVA per ventilation guidelines; the 7-inch V300 is a common choice for comp shingle ridges. Fasten through the vent into the ridge framing per instructions and cap with ridge shingles, keeping the slot within the manufacturer’s specified width.

Ridge sheathing cuts affect roof structure; follow the manufacturer’s instructions and local code, and use roof fall protection.

Get Cor-A-Vent V300 7 in. x 4 ft. ridge vent for a clean, high-flow ridge exhaust.