Cobra Rigid Vent 3
Instructions, Data Sheets, Codes

Cobra^® Rigid Vent 3™ Exhaust Vent for Roof Ridge

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 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
Possibly reduce excessive heating and air conditioning costs

Good Housekeeping

Cobra^® Rigid Vent 3™ exhaust
vent is a key part of the GAF-Elk Smart Choice^® Roof System Solution, and has even earned
the prestigious Good Housekeeping Seal.

Homeowner’s Best Choice

Vents Your Attic…
Allows heat and condensation to escape at the most effective location — the ridge
Looks Terrific…
Shingle-over design blends into your ridge line
Watertight…
Passes the 110 mph wind-driven rain test*
Insect Guard…
Specially-designed louver spacing helps keep insects out
Energy Efficient…
May even reduce your utility bills!
Durable…
Designed with high-impact polymers
Peace Of Mind…
Backed by a 40-year ltd. warranty**

*Under controlled laboratory conditions

**See ltd. warranty for complete coverage and restrictions

Professional’s Best Choice

Effective…
Provides 18 sq. inches per linear foot of net free ventilating area
3" Ring Shank Nails Included…
Ensures proper fastening on every installation
Easy Sizing…
EasyTear™ feature allows you to hand-tear product in 3" increments — no knives necessary and less waste!
Fits Better…
Extra-flexible hinge design allows installation on 3:12 to 16:12
sloped roofs
No End Caps Needed!
Crush Resistant…
Internal structural support for added durability
No Gaps…
Edge overhang allows smooth, continuous coverage between sections
Less Call-backs…
External baffles help deflect wind and rain
Ridge Cap Compatible…
Works with traditional size

18 Vents or 10 Turbines

Texas Department of Insurance

Balanced Ventilation Requirements

Balanced ventilation requires an equal amount of intake ventilation and exhaust ventilation. GAF-Elk 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.

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^® Rigid Vent 3™ exhaust vent that is needed.
Find the appropriate amount of Cobra^® Rigid Vent 3™ exhaust vent and minimum intake ventilation that corresponds to the total attic square footage.

Based on 1/300 Rule
Total Attic Square Footage	Recommended Length of Cobra^® Rigid Vent 3™ Exhaust Vent (Feet)	Minimum Intake Ventilation (Net Free Area in Sq. In.)
1600	22	396
1900	26	468
2200	30	540
2500	34	614
2800	38	684
3100	42	756
3400	46	828

Cobra^® Rigid Vent 3™ exhaust vent has 18.0 sq. in./linear ft. of net free ventilating area.

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.