Attic Air Flow

If the soffit of your home isn t perforated to allow air movement either replace it with perforated soffit or install round air vents under the eaves to allow air flow.

Attic air flow.

Soffit vents allow outside air to enter the attic while vents along the peak of. The airflow from the soffits to the ridge vent keeps the roof cool and prevents ice dams and the material will block that flow. Static roof line vents are effective for ventilation but generally aren t recommended due to issues with leaks. Staple plastic or foam baffles to the roof sheathing near the eaves to keep the material away.

Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation evenly split between intake and exhaust for every 300 square feet of attic floor space. Soffit vents may leave air trapped at the top of your attic. That means air can t flow from the soffit vents to the roof vents. Make sure there is air flow from the eaves.

Most building codes require a ratio of 1 150 ventilation space to attic floor space. Attic air is an insulation company that specializes in evaluating your home to ensure that it is properly ventilated and insulated and the evaluation is free. Proper air circulation through the attic space helps lower cooling bills and prolongs the life of roofing materials. The insulation will resist heat transfer into the house.

Baffles are available at home centers. Proper attic ventilation consists of a balance between air intake at your eaves soffits or fascias and air exhaust at or near your roof ridge. Intake vents located at the lowest part of the roof under. This is normally the point where air enters your attic.

In the summer natural air flow in a well vented attic moves super heated air out of the attic protecting roof shingles and removing moisture. Ventilation can be accomplished using various products and techniques. Cool air in hot air out attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Ventilation of attic spaces is required by most building codes as well as by roofing material manufacturers and the national roofing contractors association nrca.

Gable vents may circulate air through only a small percentage of your attic. Before we explore how to ventilate an attic space it is prudent to understand how much ventilation is needed. For the same reason insulation shouldn t touch the roof s underside. The most common mistake homeowners make when installing insulation is to block the flow of air at the eaves.