Cobra Vents - Cobra Fascia Vent

Effective attic ventilation is critical for a long-lasting roof. However, over the last 30-40 years, the changing architectural style of many homes has made proper ridge venting impractical. A Cobra® Hip Vent will help to:

  • Provide a safe and effective attic ventilation solution for roofs with little or no ridge

  • Remove excess heat and moisture to protect your roof from premature deterioration

  • Look virtually invisible when installed on your roof

  • Protect against weather infiltration that can damage your attic and possessions

  • Avoid rot and limit the growth of harmful mold

  • Guard against ice damming in harsh winter climates

  • Possibly reduce excessive utility costs

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

Homeowner's Best Choice

  • Vents Your Attic... Allows damaging heat and condensation to escape from your attic.
  • Looks Fantastic... Cobra Hip Vent’s low-profile, shingle-over design makes it virtually invisible when installed.
  • Energy Efficient... When used in a properly balanced attic ventilation system, it can help reduce your utility bills by allowing super-heated air to escape the attic.
  • Maximum Protection... Rigorously tested under extreme conditions to resist snow, wind, and rain infiltration.†
  • Durable... Made from high-impact polymers for long-lasting performance
  • Dual Weather Fighter Filter®... Helps prevent weather, insect, and even pine needle infiltration into your attic.
  • Peace of Mind... Up to a Lifetime ltd. warranty when installed on Lifetime Shingle roofs. (See Details)
†Under controlled laboratory conditions.

Professional's Best Choice

  • A True Solution... For providing safe and effective ventilation on roofs with little or no ridge area.
  • Fast & Easy to Install... Fully nail-gunnable for fast vent and cap shingle installation. Includes 3 coils of 1¾" nails that are Miami-Dade County Product Control Approved for corrosion resistance.
  • Effective... Provides 9 sq. inches per lineal foot of net free ventilation area
  • Versatile Installation... Designed for use on 3-tab strip, laminate, and designer asphalt shingle roofs.
  • Fits Great... Extra-flexible hinge hugs the roof tightly and allows for installation on 3:12 - 12:12 hip roof slopes.
  • Cap Shingle Compatible... Works with traditional-size (12") ridge cap shingles.
Note: Cobra® Hip Vent must only be installed on hips. Do NOT install on ridges.

Florida Building Code
Texas Department of Insurance
Product Evaluation RV-93

Cobra® Hip Vent - Basic Installation Demo Video

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 highest number). This number will determine the minimum total amount of Cobra® Hip Vent that is needed.
  2. Find the appropriate amount of Cobra® Hip Vent and minimum intake ventilation that corresponds to the total attic square footage.

Based on 1/300 Rule

Total Attic
Square Footage
Recommended Minimum Length of Cobra® Hip Vent (Feet)
Minimum Intake Ventilation
(Net Free Area in Sq. In.)
Cobra® Hip Vent has 9 sq. in./lineal ft. of net free ventilating area and must be installed using staggered hip air slots. See complete installation instructions available from GAF. NOTE: Always have a balanced ventilation system. In no case should the amount of exhaust ventilation exceed the amount of intake ventilation.


All documents are U.S. English unless otherwise noted

Get Automatic Lifetime Protection On Your Cobra® Hip 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
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