Panels Needed
22 panels
Soffit Area
240.0 sq ft
Vents
40
Total Cost
$874
22
40
240.0 sq ft
$874
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Price as of Jul 24, 2026. Product prices and availability are accurate as of the date indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
Inputs
Result
Soffit area = 160 × 1.5 = 240 sq ft. Panel coverage = (12/12) × 12 = 12 sq ft. Panels = ceil(240/12 × 1.1) = 22. Vents = ceil(160/4) = 40.
Inputs
Result
Soffit area = 200 × 2 = 400 sq ft. Panel coverage = 12 sq ft. Panels = ceil(400/12 × 1.1) = 37. Vents = ceil(200/4) = 50.
Multiply your house perimeter by the overhang depth to get the soffit area in square feet. Then divide by the panel coverage area (width x length) and add 10% for waste and cuts.
Soffit vents should be spaced every 4 to 6 feet along the eave. Building codes typically require 1 square foot of net free vent area per 150 square feet of attic floor space.
| Ventilation Method | Net Free Area | Cost | Maintenance |
|---|---|---|---|
| Individual soffit vents | 32–50 sq in each | $3–$6 each | Low – may clog with debris |
| Perforated soffit panels | Continuous strip | $2–$4/ft | Very low |
| Continuous strip vent | 9–18 sq in/ft | $1–$3/ft | Low |
J-channel is trim that holds the soffit panel edges and runs along both the fascia and wall sides. F-channel (or F-trim) is used on the wall side as an alternative to J-channel, providing a cleaner finished look.
Vinyl soffit is the most popular due to low cost and zero maintenance. Aluminum is more durable and fire-resistant. Wood offers a traditional look but needs regular painting. Fiber cement is the most weather-resistant.
| Material | Cost/sq ft | Lifespan | Maintenance |
|---|---|---|---|
| Vinyl | $1–$3 | 20–30 years | None |
| Aluminum | $3–$6 | 30–40 years | Minimal |
| Wood (T&G) | $4–$8 | 15–25 years | Paint every 3–5 yrs |
| Fiber cement | $5–$10 | 40–50 years | Paint every 10+ yrs |
| PVC | $3–$5 | 25–35 years | None |
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Last Updated: Jul 24, 2026
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