How Does Attic Ventilation Work

In cold climates the primary purpose of attic or roof ventilation is to maintain a cold roof temperature to control ice dams created by melting snow and to vent moisture that moves from the conditioned space to the attic ventilation acts to bypass the vapour barrier created by most roof membranes.

How does attic ventilation work.

Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic. Are ridge vents better. Unless you have a finished attic you probably aren t fond of spending time up there during a hot summer day. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.

Static roof line vents are effective for ventilation but generally aren t recommended due to issues with leaks. How an attic fan works attic fans exhaust hot air from your attic to the outside. Soffit vents may leave air trapped at the top of your attic. If you have too much attic ventilation you may also have too much roof penetration which can cause blowouts during a hurricane.

Most effective ventilation uses a ridge and soffit continuous ventilation system but even these designs can vary from roof to roof. It allows outside air to flow naturally upward and out of attic. Roof vents remove wintertime s heated air. Certain types of vents actually trap air in the top of your attic.

Attic fans are intended to cool hot attics by drawing in cooler outside air from attic vents. About attic ventilation natural attic ventilation. When it is cold outside the ventilation system will work by maintaining the cold temperature so that ice will not melt on the roof and create ice dams. With no air conditioning vents pumping in cool air and the hot sun beating down on the roof right over your head attic temperatures can soar.

Fresh air is pulled in from your soffits and or roof vent creating a draft through your attic. An attic ventilator is essentially a port where air can escape to the outdoors. Proper attic ventilation offers all these benefits. It helps prevent moisture from becoming trapped in insulation structural wood shingles and roof deck it.

But with proper ventilation you can at least bring those temperatures down to match that of the outdoor air. It promotes a cool dry attic. It helps minimize the impact of ice damming. At first it may seem odd to add insulation for warmth and then purposely allow cold air to.

The purpose of attic ventilation is so that heat can leave the attic when the air conditioner turns on and is trying to circulate cold air around the house. Attic vents are all i need for attic ventilation.