It provides 9 sq.
Gaf cobra attic ventilation.
Proper attic ventilation can help reduce the load on your air conditioner.
Inches per linear foot 19 051 mm 2 lm of net free ventilating area to help exhaust heat and moisture from the attic.
To calculate the amount of ventilation you need for your home visit gaf s ventilation calculator now.
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.
Cobra rigid vent 3 exhaust vent for roof ridge allows heat and moisture to escape at the ridge.
Get automatic lifetime protection on your entire gaf roofing system when you install any gaf lifetime shingle and at least 3 qualifying gaf accessories you ll automatically get a lifetime limited warranty on your shingles and all qualifying gaf accessories.
It provides 18 sq.