How Many Baffles Do I Need In My Attic

The siding fellow took out the 8 x12 soffit screen vents just left the holes when he put vinyl soffit wrap on.

How many baffles do i need in my attic.

Insulation radiant and vapor barriers baffles needed in every rafter bay. I want to ask a question. The first step in determining how many rafter vents your home needs is to determine your home s vent space in square feet. I am getting ready to blow insulation into my attic.

I had the roofer add some roof vents when he reshingled. 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. The attic has about 9 10 inches of loose fill fiberglass giving r 25 and was not air sealed. Do i need the soffet insulation vent.

Measure the length and width of the house in feet. 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. 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 general rule is that you must have one square foot of vent space for every 150 square feet of attic area.

The remaining part. Multiply those two numbers and then divide by 150 to get the vent space square footage. Attic baffles how they work. The picture below courtesy of the epa indoor airplus program which we provide builder verification services for helps show how the system works.

Calculate how many rafter vents you need. I have fiberglass batts in the attic and will also be installing a radiant barrier under the roof. Would it be worth while to add soffit baffles in every rafter bay before adding cellulose insulation to r 60. How much vent space do you have.

These specialty vents do not affect the. Baffles are also called wind baffles venting chutes rafter vents or insulation baffles. 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. Baffles provide a channel for air to flow through certain parts of the attic.