In no case should the amount of exhaust ventilation at the ridge exceed the amount of soffit ventilation.
Gaf roof ridge vent.
Gaf cobra ridge vent 3 13 7 in x 48 in black plastic stick roof ridge vent.
Inches per linear foot 67 720 m 2 lm of net free ventilating area and its unique easytear sizing feature allows you to hand tear product in 3 76 mm increments no knives necessary and less waste.
The first step is to check out this 60 second video and learn about the 300 1 rule the difference between intake and exhaust ventilation and why proper ventilation is so important to get right to help calculate your attic ventilation needs visit gaf ventilation calculator.
For installations not eligible for the gaf roofing system limited warranty see the gaf shingle accessory limited warranty.
When installed as part of a properly balanced attic ventilation system gaf cobra rigid vent 3 is a rigid style shingle over exhaust vent installed at the roof ridge that helps exhaust excess heat and moisture from your attic while resisting wind driven rain infiltration.
Gaf cobra snow.
It provides 18 sq.
Always have a balanced ventilation system.
When installed as part of a properly balanced attic ventilation system gaf cobra snowcountry is a rigid style shingle over exhaust vent installed at the roof ridge that helps exhaust excess heat and moisture from your attic while resisting wind driven rain and snow infiltration.
Cobra rigid vent 3 exhaust vent for roof ridge allows heat and moisture to escape at the ridge.
Gaf recommends per best practices adding at least 10 for waste.