When installed as part of a properly balanced when installed as part of a properly balanced attic ventilation system gaf cobra exhaust vent is a shingle over exhaust vent installed at the roof ridge that helps exhaust excess heat and moisture from your attic.
Passive roof ventilation.
Installing a roof ventilation system can help you in the following ways.
Roof vents enhance the overall comfort of the house by providing escape hatches for hot stale moist air which can reach temperatures of 150 degrees in summer.
This attic fan roof fan is rated for continuous exhaust.
Passive roof vents expel excess heat and moisture.
Ice damming can often make the roofing materials weak and ineffective.
Your roof will become much more durable once it is vented.
Calculate or enter the square footage of the attic or area to be vented.
Recommended airflows of either 10 000mm per linear metre or 25 000mm are determined by the pitch or the design of the roof and can be easily achieved using recommended product combinations.
During the time when the roof mounted power attic ventilator is turned off the ventilator will still allow for gentle passive ventilation.
Passive ventilation the most common way to provide attic ventilation for asphalt shingle roof assemblies is by nonpowered passive ventilation.
After installation the only maintenance needed is periodical cleaning of the filters.
Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator.
Organizations such as the nrca recommend against this roof vent style in cold climates because it can promote ice dams.
Passive ventilation doesn t require electricity so it saves energy and cuts down on carbon monoxide emissions.
Proper ventilation will prevent this from happening.
A drip edge vent is made of a corrosive resistant material that sticks out about three inches back from the roof edge and then bends downward over them.
It comes on an easy to install flexible mesh roll and is hand nailable with no complicated fitting wrapping nail gun adapters connectors or end plugs needed.
Power attic ventilators are best when mounted on a roof that poses a roof pitch of 3 12 up to 12 12.
Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic.
Whilst it is possible to retrofit passive ventilation solutions to existing buildings it is highly recommended to incorporate passive ventilation during the design phase of any new building project.
It s quiet inexpensive energy efficient and low maintenance because it requires no moving parts and has no operating costs.
As a result the whole roof system will be prone to damage.
This method relies primarily on natural air convection the upward movement of heated air because of its lower density but may also take advantage of wind generated pressure differences.
Passive roof vents encourage natural air flow and work without the aid of motorized fans.
Drip edge vents are a two in one installation that promote water shedding at the eaves and rakes of a roof while also allowing for ventilation into the attic.
