Proper Airflow In Attic

Make sure there is air flow from the eaves.

Proper airflow in attic.

Don t avoid ventilating your attic for fear you re letting cold air into the house. Staple plastic or foam baffles to the roof sheathing near the eaves to keep the material away. There are many different options available to provide adequate ventilation to your attic space. That said air resistance and interference such as vent grates reduces the area of true ventilation.

At first it may seem odd to add insulation for warmth and then purposely allow cold air to. Your actual living space is sealed. Ventilation can be accomplished using various products and techniques. In other words the entire vent opening doesn t count as vented space.

The venting space should be equally divided between intake and outflow vents and the. Your roof vents may not look. 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. 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.

For the same reason insulation shouldn t touch the roof s underside. Obviously more research is needed but here s what we do know. Cool air in hot air out attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Guide to attic air ventilation adequate ventilation.

Touch your ceiling on a warm sunny day. Building codes typically require 1 square foot of venting space for every 150 square feet of attic space. About attic ventilation natural attic ventilation. 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.

Before we explore how to. 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. Look at your eaves and roof. A hot ceiling tells you that the attic is acting like a solar oven raising your cooling bills and.

If there are asphalt shingles on your roof the attic must be ventilated to comply with the terms of the. Attic fans are intended to cool hot attics by drawing in cooler outside air from attic vents. If you don t see any attic vents on the roof or in the eaves you need to add some.