How Many Baffles Do I Need In My Attic

Do i need the soffet insulation vent. The siding fellow took out the 8 x12 soffit screen vents just left the holes when he put vinyl soffit wrap on. 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.

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How many baffles do i need in my attic.

Baffles are also called wind baffles venting chutes rafter vents or insulation baffles. Would it be worth while to add soffit baffles in every rafter bay before adding cellulose insulation to r 60. I m adding some insulation to my attic and i m convinced i haven t been getting enough ventilation. These specialty vents do not affect the.

The first step in determining how many rafter vents your home needs is to determine your home s vent space in square feet. 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. Calculate how many rafter vents you need.

Multiply those two numbers and then divide by 150 to get the vent space square footage. How much vent space do you have. Baffles provide a channel for air to flow through certain parts of the attic. Insulation radiant and vapor barriers baffles needed in every rafter bay.

I had the roofer add some roof vents when he reshingled. The remaining part. Attic baffles how they work. The book that helped us build and renovate.

An attic baffle is simply an item to regulate the flow of air aka required roof venting and impede it the insulation from interfering with each other. The picture below courtesy of the epa indoor airplus program which we provide builder verification services for helps show how the system works. The attic has about 9 10 inches of loose fill fiberglass giving r 25 and was not air sealed. Measure the length and width of the house in 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. 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 want to ask a question. I am getting ready to blow insulation into my attic.

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