For the best results place roof ventilation near the roof s peak and soffit vents in the eaves.
Attic soffit vents restricted.
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.
These vents allow outside air to enter the attic at the lowest point of the roof along the underside of the eave.
Because the soffit vents are on the attic floor it s easy to cover them with insulation.
Enter square footage calculate or enter the square footage of the attic or area to be vented.
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.
They re most effective when used in conjunction with a continuous ridge vent.
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.
Roofing attic ventilation.
Soffit vents come in several sizes and styles including small round discs and rectangular grilles.
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.
Most effective ventilation uses a ridge and soffit continuous ventilation system but even these designs can vary from roof to roof.
Vents come in various styles.
You can remove insulation from inside the attic or from underneath the soffits.
Air flows in through the soffit vents and out through the roof vents.
Normal vented air likes to enter the attic lower down near the bottom third of the attic and as it passes through it will exit higher up near the top third of the attic space.
Master flow 21 amerimax home products 1 deflect o 1 gibraltar building products 1.
Grab a flashlight and inspect your attic during the winter.
Resin circular mini wall louver soffit vent in white 6 pack model rlsc2 view the master flow intake vents 9 28 9 28.
Typically you would have a gable vent on each end of the attic.
The photograph at page top shows an attic whose intake venting is blocked by fiberglass insulation.
The photograph at left shows severe mold on the underside of roof sheathing in a 1920 s cape cod attic where there was no under roof ventilation.
Master flow 2 in.
Blocked soffit vents invites attic or roof cavity moisture condensation mold.
Once it s out of the way.
If you see dampness or frost you need better roof ventilation and some attic vents.
