Cobra Vents - Cobra Fascia Vent

Cobra® Fascia Vent

Attic Intake Ventilation on a Coil!

Effective attic ventilation is critical for a long-lasting roof! A properly balanced attic ventilation system will help to:
  • Remove excess heat and moisture to help protect your roof from premature deterioration

  • Prevent roof rot in your attic or roof deck

  • Minimize peeling and extend the life of exterior and interior paint

  • Limit the growth of harmful mold

  • Safeguard your attic possessions against mildew damage

  • Guard against ice damming in harsh winter climates Good Housekeeping

  • Promotes energy efficiency by reducing excessive heat in your attic

Cobra® Fascia Vent is a key part of the GAF Lifetime Roofing System, and has even
earned the prestigious Good Housekeeping Seal. (See Details)

Homeowner’s Best Choice

  • Great Solution…
    Provides excellent air intake in homes without soffits

  • Safeguards Possessions…
    Reduces condensation which can lead to mold growth by allowing cooler air to enter through fascia, forcing heat out at the roof’s exhaust vents

  • Looks Terrific…
    Virtually hidden at the bottom of your home’s fascia for a clean and finished look

  • Protects Your Home…
    Helps to prevent wood rot and extend the life of your exterior paint

  • Resists infestation…
    Cobra® Fascia Vent provides effective air intake, while helping to protect your attic space from insects, birds, and other unwanted infiltration

  • Lifetime Roofing Badge Peace of Mind…
    Up to a Lifetime ltd. warranty when installed on Lifetime Shingle roofs (See Details)

Professional’s Best Choice

  • Conveniently Packaged…
    Two 50-foot sections packaged in roll form for easier handling

  • Easy To Install…
    Just unroll and nail in place

  • Fast Applications…
    Cobra® Fascia Vent is easily cut with standard utility knives

  • Use Anywhere…
    Can be used on both wood and metal fascia systems, as well as low and steep-slope applications

  • Sizes For Virtually Every Fascia…
    Available in both 1" x 3" x 50' and 1 1/2" x 3" x 50' models for coverage on most fascia

  • Great Ventilator…
    Net Free Area:
    1" x 3": 11 sq. inches per foot
    1 1/2" x 3": 16 sq. inches per foot

Balanced Ventilation Requirements

Balanced ventilation requires an equal amount of intake ventilation and exhaust ventilation. GAF recommends, at a minimum, providing 1 square foot of Net Free Ventilation for every 300 square feet of attic floor space. Consult local building codes for specific ventilation requirements in your area.

  1. Calculate the total square footage of the attic floor area (round up to the next highest number). This number will determine the minimum total linear feet of Cobra® Fascia Vent that is needed.
  2. Find the appropriate amount of Cobra® Fascia Vent and minimum exhaust ventilation that corresponds to the total attic square footage.

How Much Do I Need? (Based on 1/300 Rule)
Total Attic
Square Footage
Recommended Length of
Cobra® Fascia Vent (Feet)*
Minimum Exhaust Ventilation
(Net Free Area in Sq. In.)

* First figure pertains to 1" width. Second figure pertains to 1.5" width.
NOTE: Always have a balanced ventilation system. In no case should the amount of exhaust ventilation at the ridge exceed the amount of soffit ventilation.


All documents are U.S. English unless otherwise noted

Get Automatic Lifetime Protection On Your Cobra® Fascia Vents and Your Entire GAF Roofing System!

  • A Lifetime ltd. warranty... on your shingles and all qualifying GAF accessories! (See Details)
  • Non-prorated coverage for the first 10 years (See Details)

Professional Installation
GAF Roof Wizard Virtual Home Remodeler

Product Pricing and Where to Buy