Cobra® 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
- Promote energy efficiency by reducing excessive heat in your attic
Cobra® Exhaust 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)
* The GAF Lifetime Roofing System has earned the prestigious Good Housekeeping Seal (U.S. only), which means that Good
Housekeeping stands behind the products in this system. (Refer to Good Housekeeping Magazine for its consumer
protection policy. Applicable in U.S. only.)
Homeowner’s Best Choice
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Safer For the Environment...
Manufactured with 100% recycled fiber to help reduce the amount of material entering landfills.
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Vents Your Attic…
Allows heat and condensation to escape at the most effective location — the ridge
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Looks Terrific...
100% shingle-over design is virtually invisible when installed
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Excellent Protection...
Helps to prevent wood rot and extends the life of your exterior paint.
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Safeguards Possessions...
Helps limit mildew growth caused by damp attic air
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Energy Efficient...
May even reduce your utility bills!
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Weatherproof...
Passes 110 MPH wind-driven rain and snow infiltration tests.
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Safer...
Helps prevent problems with insects, birds, and animals in your attic
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Peace Of Mind...
Up to a Lifetime ltd. warranty when installed on Lifetime Shingle roofs (See Details)
Professional’s Best Choice
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Enhanced Design…
Improved compression resistance helps reduce waviness that can detract from the roof's finished look
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Easy Installation...
No need for nail gun adapters, complicated wrapping, connectors, or end-plugs
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Nails Included...
Smart Nails™ ™ for hand-nailing, or
13/4" (44mm) coil nails for nail guns, which ensures consistent installation
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Excellent Performance...
Net free ventilating area:
Cobra® Hand Nail: 16.9 sq. in./lineal foot (109.03 sq. cm/lineal meter)
Cobra® Nail Gun: 14.1 sq. in./lineal foot (90.97 sq. cm/lineal meter)
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Cap Shingle Compatible……
Options available for 12", 9", and metric width ridge cap shingles
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Two Lengths…
Available in 20' & 50' rolls.
Texas Department of Insurance
Product Evaluation RV-19
Florida Building Code
ICC-ES ESR 1265
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.
- Calculate the total square footage of the attic floor area (round up to the next highest number). This number will determine the minimum total lineal feet of Cobra® Exhaust Vent that is needed.
- Find the appropriate amount of Cobra® Exhaust Vent and minimum intake ventilation that corresponds to the total attic square footage.
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How Much Do I Need? (Based on 1/300 Rule)
|
||
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Total Attic
Square Footage |
Recommended Length of
Cobra® Exhaust Vent (Feet)* |
Minimum Intake Ventilation
(Net Free Area in Sq. In.)* |
|
1600
|
23/28
|
389/395
|
|
1900
|
27/33
|
457/466
|
|
2200
|
32/38
|
541/536
|
|
2500
|
36/43
|
609/607
|
|
2800
|
40/48
|
676/677
|
|
3100
|
45/53
|
761/748
|
|
3400
|
49/58
|
829/818
|
*First figure pertains to hand nail, second figure pertains to nail gun.
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.
Documents
All documents are U.S. English unless otherwise noted
Get Automatic Lifetime Protection On Your Cobra® Exhaust 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)
