Measure the length and width of the house in feet.
How many baffles do i need in my attic.
Calculate how many rafter vents you need.
The siding fellow took out the 8 x12 soffit screen vents just left the holes when he put vinyl soffit wrap on.
I m adding some insulation to my attic and i m convinced i haven t been getting enough ventilation.
The remaining part.
I spent a few days air sealing all penetrations and top plates in the attic and noticed we have soffit baffles in every other rafter bay.
I have fiberglass batts in the attic and will also be installing a radiant barrier under the roof.
The general rule is that you must have one square foot of vent space for every 150 square feet of attic area.
Baffles provide a channel for air to flow through certain parts of the attic.
These specialty vents do not affect the.
How much vent space do you have.
The book that helped us build and renovate.
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The picture below courtesy of the epa indoor airplus program which we provide builder verification services for helps show how the system works.
Rafter vents or insulation baffles install in any rafter space to create narrow gaps that direct fresh air from the soffit vents to the peak of the roof.
I had the roofer add some roof vents when he reshingled.
Attic baffles how they work.
The first step in determining how many rafter vents your home needs is to determine your home s vent space in square feet.
My question is do i need baffles or should i just make sure there is a small gap over the soffit vents and if so should the baffles be positioned below or above the radiant barrier.
Would it be worth while to add soffit baffles in every rafter bay before adding cellulose insulation to r 60.
The attic has about 9 10 inches of loose fill fiberglass giving r 25 and was not air sealed.
I am getting ready to blow insulation into my attic.
I want to ask a question.
Multiply those two numbers and then divide by 150 to get the vent space square footage.
Baffles are also called wind baffles venting chutes rafter vents or insulation baffles.