Most effective ventilation uses a ridge and soffit continuous ventilation system but even these designs can vary from roof to roof.
Attic vent through soffit.
Make the vent hole 1 2 in.
For the best results place roof ventilation near the roof s peak and soffit vents in the eaves.
If you see dampness or frost you need better roof ventilation and some attic vents.
A soffit vent is simply a vent installed into the underside of your home s eaves called the soffit that permits fresh outside air to be drawn up into the attic.
Soffit vents come in several sizes and styles including small round discs and rectangular grilles.
They re most effective when used in conjunction with a continuous ridge vent.
An attic s intake vents are most commonly installed directly in the soffit either as individual vents spaced every few feet or as one continuous perforated soffit running the entire length of.
The vent should exit the building through the roof or wall at least 3 feet away from any other building openings and the vent cover which must not include a screen should allow dispersal of.
Air flows in through the soffit vents and out through the roof vents.
Master flow 2 in.
Smaller on each side than the vent you re installing.
Mark holes for soffit venting.
If you don t know how your roof vents work or if you re unsure about your attic ventilation in general you should talk to a roof inspector about your current system and any inherent weaknesses that may be at.
Roofing attic ventilation.
Butt a cardboard template against the fascia and mark your soffit hole locations to begin soffit vent installation.
Outside air enters the attic space through soffit or eave vents rises through the attic space as it warms and exits through vents that are positioned at or near the top.
For this method to be most effective approximately equal amounts of ventilation should be placed at the soffits or eave level and at or near the top of the attic space.
More ways to filter.
Vent these fans through the roof or soffit.
Enter square footage calculate or enter the square footage of the attic or area to be vented.
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.
Vents come in various styles.
Add soffit venting first.
Almost all homes are fitted with some kind of roof vents at the peak of the roofline be it individual roof vents hip roof ventilation and many homes have gable vents as well.
These vents allow outside air to enter the attic at the lowest point of the roof along the underside of the eave.