Attic Baffles Requirements

Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.

Attic baffles requirements.

Basic functions of baffles baffles are chutes that when installed properly can provide a channel for air to flow from your exterior soffit vents up into your attic space. The main function of an attic baffle is to draw the air in from outside your home and allowing it to circulate around your attic. Attic baffles how they work. Each bag lists the required depths for a range of r values and the number of bags needed to cover 1 000 square feet at those depths.

Ft divided by 150 equals 10 sq. For loose fill read labels. Measure your attic s square footage. That airflow is intended to churn the stale air in.

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. Calculate the total vent area needed. Length x width of attic in feet 150 total sq. The picture below courtesy of the epa indoor airplus program which we provide builder verification services for helps show how the system works.

Attic ventilation system with built in baffle 10 per carton 4 4 out of 5 stars 3 accuvent 14 5 x 50 16 o c flame retardant pvc high energy vent 50 pack acbp18429. Rafter vents or insulation baffles install in any rafter space. Fit each one snuggly in the bay with the bottom starting where the ceiling joist meets the roof rafter. Ado products durovent 23 1 2 in.

Pull any existing insulation away from the edges of the attic where you will be putting up the baffles. Multiply the length of the attic times the width in feet to find the attic area then divide by 150 to find the total square feet of vent space needed. Surprisingly even the most well insulated attic space may still require the assistance of attic baffles to provide the additional air circulation. While it may seem counterintuitive even well insulated attic spaces require air circulation.

For batts or rolls calculate the number based on the width and length of the product you re using. That means drawing air in from outside the home and allowing it to push through the attic. You can situate the baffles where the circulation is mainly required. Baffles are a critical component to our attic insulation process that provides multiple benefits to a difficult construction aspect.