Also should the vents to the crawl space.
Attic too small get soffit vents.
If the attic ventilation system is not a balanced combination of intake vents installed in the soffit under eave or at the roof s bottom edge and exhaust vents installed at or near the roof s peak the attic ventilation system will not be efficient and effective.
If you re lacking good attic ventilation installing a soffit vent where needed is a no brainer.
Generally speaking you need a ratio of 1 300 where for every 300 square feet of ceiling space you need 1 square foot of attic ventilation.
So if your attic is 1 500 sq.
A hot ceiling tells you that the attic is acting like a solar oven.
If you don t see any attic vents on the roof or in the eaves you need to add some.
Touch your ceiling on a warm sunny day.
Here s how to keep the air moving with soffit vents.
The rule of thumb on the amount of vent space needed is approximately 1 sq.
My house has soffit vents on the eaves gable vents on each end of the house and a ridge vent.
These vents allow outside air to enter the attic at the lowest point of the roof along the underside of the eave.
Add soffit venting first.
If your home is fitted solely with small gable end vents or a ventilator high in the roof you might want to consider adding soffit vents to increase airflow.
Here are four signs of an unventilated or under ventilated attic.
Talk to your local home improvement store or a professional contractor and get to improving your attic ventilation as soon as possible.
This is one home improvement task that is well worth undertaking.
Building codes vary.
Is this too much ventilation.
Ft you divide that by 150 to get 10 sq.
This is called passive ventilation.
I live in north carolina.
Of vent space for every 150 sq.
It prevents mildew growth and rot on your roof s framing and sheathing by.
The most common way to add ventilation to an attic is by installing air intakes in the soffits and putting an outlet at the gable of the house.
This creates a natural air flow by drawing in the air from outside pushing it up and out through the vent at the top of the house.
In order to facilitate this exchange of warm and cool air the general rule of thumb suggests installing at least 1 sq.
In other words the entire vent opening doesn t count as vented space.
A well ventilated attic offers four benefits.
Soffit vents come in several sizes and styles including small round discs and rectangular grilles.
That said air resistance and interference such as vent grates reduces the area of true ventilation.
Look at your eaves and roof.
