1. What is Continuous Soffit Vent Calculation?

The continuous soffit vent calculation determines the required length of venting needed for proper roof ventilation based on the roof length and vent width factor. Proper soffit ventilation helps prevent moisture buildup and extends roof life.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• Roof Length — The horizontal length of the roof (in feet)
• Vent Width Factor — The vent width per linear foot (in feet)

Explanation: The calculation provides the total linear feet of continuous soffit vent needed for adequate roof ventilation.

3. Importance of Proper Ventilation

Details: Proper soffit ventilation is crucial for maintaining attic temperature, preventing ice dams in winter, and reducing cooling costs in summer by allowing hot air to escape.

4. Using the Calculator

Tips: Measure your roof's horizontal length accurately. The vent width factor is typically provided by the vent manufacturer (common values range from 0.02 to 0.05 ft per linear foot).

5. Frequently Asked Questions (FAQ)

Q1: What's a typical vent width factor?
A: Most continuous soffit vents have a factor between 0.02 and 0.05 ft per linear foot of roof.

Q2: How much ventilation does a roof need?
A: Building codes typically require 1 sq.ft. of ventilation for every 150-300 sq.ft. of attic space.

Q3: Can I use this for different vent types?
A: This calculator is specifically for continuous soffit vents. Other vent types may require different calculations.

Q4: Should vents be evenly distributed?
A: Yes, for best performance, vents should be evenly spaced along the soffit.

Q5: What about ridge vents?
A: Ridge vents work in combination with soffit vents to create proper airflow. They require separate calculations.