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Cor-A-Vent V300 8-1/2 in. x 4 ft. Ridge Vent
Regular price $17.85Orders start at $399 — combine any items to reach the minimum. Learn more
Cor-A-Vent V300 8-1/2 in. x 4 ft. Ridge Vent
This is a Cor-A-Vent V300 ridge vent piece measuring 8-1/2 in. wide by 4 ft. long, delivering 13.5 sq in. of net free vent area per lineal foot. Sold per piece with 12 pieces per carton, it provides continuous ridge exhaust ventilation for shingle roofs. Pair with adequate intake ventilation such as soffit or eave vents.
Key Features:
- 13.5 sq in. NFVA: Provides 13.5 square inches of net free vent area per lineal foot.
- 4 ft. sections: Each piece is 8-1/2 in. wide and 4 ft. long for manageable handling and installation.
- Continuous exhaust: Installed along the ridge for balanced, continuous roof exhaust ventilation.
- Carton of 12: Ships 12 pieces per box and per carton, covering 48 ft. of ridge per carton.
- Lightweight: Each 4 ft. piece weighs about 2 lb for easy installation.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Cor-A-Vent |
| Manufacturer model | V-300-CS |
| Sell unit | 1 piece, 8-1/2 in. x 4 ft. |
| Product line | V300 |
| Profile / style | Ridge vent |
| Dimensions | 8-1/2 in. wide x 4 ft. long |
| Coverage per unit | 4 linear ft. per piece; 13.5 sq in. NFVA per lineal ft. |
| Net free vent area | 13.5 sq. in. per lineal ft. |
| Pack quantity | 12 pieces per box / 12 per carton |
| Weight | 2 lb per piece |
| Intended use | Ridge exhaust ventilation |
Coverage & How Much You Need:
One 4 ft. piece covers 4 linear feet of ridge and supplies 54 sq in. of net free vent area (13.5 sq in. x 4 ft.). A 12-piece carton covers 48 linear feet of ridge. Size total vent area to balance with intake ventilation per code and manufacturer guidance.
Fit and Compatibility:
Part of the Cor-A-Vent V300 ridge vent line for sloped shingle roofs; must be paired with compatible intake ventilation to achieve balanced airflow. Fasteners and ridge cap shingles are installed over the vent per the manufacturer's instructions.
Frequently Asked Questions (FAQ):
Q: How much ridge does one piece cover?
A: Each 4 ft. section covers 4 linear feet of ridge; a 12-piece carton covers 48 linear feet.
Q: What is the net free vent area?
A: 13.5 square inches per lineal foot, or about 54 square inches per 4 ft. piece.
Q: How is the vent installed?
A: Cut the ridge slot per the manufacturer's instructions, fasten the vent along the ridge and cap with ridge shingles.
Q: Do I need intake ventilation?
A: Yes, ridge exhaust must be balanced with adequate intake such as soffit venting for the system to work properly.
Q: How many pieces are in a carton?
A: 12 pieces per box and 12 per carton.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
When sizing exhaust ventilation, match the 13.5 sq in./ft. NFVA of this vent to at least an equal amount of intake NFVA, since undersized intake is the most common cause of poor attic airflow. Follow the manufacturer's slot-cut dimensions carefully to avoid over-cutting the sheathing. This 8-1/2 in. V300 width suits standard shingle-over ridge installations.
Work on ridges presents a fall hazard; use appropriate fall protection and follow OSHA roof work requirements.
Order the Cor-A-Vent V300 ridge vent for continuous, code-conscious roof exhaust ventilation.
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