Proper Airflow In Attic

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.

Proper airflow in attic.

There are many different options available to provide adequate ventilation to your attic space. Touch your ceiling on a warm sunny day. If you don t see any attic vents on the roof or in the eaves you need to add some. In other words the entire vent opening doesn t count as vented space.

Your roof vents may not look. Intake vents located at the lowest part of the roof under. Guide to attic air ventilation adequate ventilation. 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.

A hot ceiling tells you that the attic is acting like a solar oven raising your cooling bills and. At first it may seem odd to add insulation for warmth and then purposely allow cold air to. Generally speaking you need a ratio of 1 300 where for every 300 square feet of ceiling space you need 1 square foot of attic ventilation. Ventilation can be accomplished using various products and techniques.

This is normally the point where air enters your attic. Staple plastic or foam baffles to the roof sheathing near the eaves to keep the material away. Look at your eaves and roof. Before we explore how to.

If there are asphalt shingles on your roof the attic must be ventilated to comply with the terms of the. That said air resistance and interference such as vent grates reduces the area of true ventilation. Your actual living space is sealed. The airflow from the soffits to the ridge vent keeps the roof cool and prevents ice dams and the material will block that flow.

About attic ventilation natural attic ventilation. Make sure there is air flow from the eaves. Building codes typically require 1 square foot of venting space for every 150 square feet of attic space. 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.

For the same reason insulation shouldn t touch the roof s underside. Obviously more research is needed but here s what we do know. Don t avoid ventilating your attic for fear you re letting cold air into the house.