How Many Baffles Do I Need In My Attic

I had the roofer add some roof vents when he reshingled.

How many baffles do i need in my attic.

Call us today for a free inspection at attic insulation toronto 647 931 6385. The first step in determining how many rafter vents your home needs is to determine your home s vent space in square 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. Measure the length and width of the house in feet.

I am getting ready to blow insulation into my attic. I have fiberglass batts in the attic and will also be installing a radiant barrier under the roof. The siding fellow took out the 8 x12 soffit screen vents just left the holes when he put vinyl soffit wrap on. The attic has about 9 10 inches of loose fill fiberglass giving r 25 and was not air sealed.

I m adding some insulation to my attic and i m convinced i haven t been getting enough ventilation. Would it be worth while to add soffit baffles in every rafter bay before adding cellulose insulation to r 60. The picture below courtesy of the epa indoor airplus program which we provide builder verification services for helps show how the system works. 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.

How much vent space do you have. Calculate how many rafter vents you need. 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.

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

The general rule is that you must have one square foot of vent space for every 150 square feet of attic area. I want to ask a question. Attic baffles how they work. Do i need the soffet insulation vent.