Attic Baffles Requirements

The picture below courtesy of the epa indoor airplus program which we provide builder verification services for helps show how the system works.

Attic baffles requirements.

You will need a baffle for each space between the rafters. Of total vent space needed. Calculate the total vent area needed. Rafter vents or insulation baffles install in any rafter space.

That means drawing air in from outside the home and allowing it to push through the attic. Ft divided by 150 equals 10 sq. 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. 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.

Attic baffles how they work. You can situate the baffles where the circulation is mainly required. A 50 x 30 attic would have a total area of 1 500 sq. 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.

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. That airflow is intended to churn the stale air in. Fit each one snuggly in the bay with the bottom starting where the ceiling joist meets the roof rafter. For loose fill read labels.

Pull any existing insulation away from the edges of the attic where you will be putting up the baffles. 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. For batts or rolls calculate the number based on the width and length of the product you re using. 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. Baffles are a critical component to our attic insulation process that provides multiple benefits to a difficult construction aspect. Measure your attic s square footage. Length x width of attic in feet 150 total sq.