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.
Passive roof ventilation.
Hot air exhaust vents located at the peak of the roof allow hot air to escape.
The keepa attic vent is built exclusively for flat roof ventilation roof pitch is 2 12 or less.
Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic.
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.
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.
Passive roof vents allow air flow throughout the house without the use of fans.
The benefits of passive roof vents.
It s quiet inexpensive energy efficient and low maintenance because it requires no moving parts and has no operating costs.
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.
The keepa attic vent is used for ventilating attics and or plenum as a roof exhaust vent or as an air intake roof vent.
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.
Proper ventilation will prevent this from happening.
Passive roof vents encourage natural air flow and work without the aid of motorized fans.
The key is to balance incoming air with outgoing and perform an annual maintenance checkup.
They help keep the home more comfortable by providing areas where the heated moist and stale air can exit your home.
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.
After installation the only maintenance needed is periodical cleaning of the filters.
It alleviates moisture in the winter and heat in the summer to extend roof membrane life.
Passive ventilation the most common way to provide attic ventilation for asphalt shingle roof assemblies is by nonpowered passive ventilation.
Ice damming can often make the roofing materials weak and ineffective.
Passive ventilation doesn t require electricity so it saves energy and cuts down on carbon monoxide emissions.
Passive roof vents expel excess heat and moisture.
Could you imagine that the temperature can reach up to 150 degrees in the summer.
