Proper Airflow In Attic

Staple plastic or foam baffles to the roof sheathing near the eaves to keep the material away.

Proper airflow in attic.

Look at your eaves and roof. 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. Cool air in hot air out attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Attic fans are intended to cool hot attics by drawing in cooler outside air from attic vents.

A hot ceiling tells you that the attic is acting like a solar oven raising your cooling bills and. The venting space should be equally divided between intake and outflow vents and the. Building codes typically require 1 square foot of venting space for every 150 square feet of attic space. Your roof vents may not look.

There are many different options available to provide adequate ventilation to your attic space. If there are asphalt shingles on your roof the attic must be ventilated to comply with the terms of the. 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.

Don t avoid ventilating your attic for fear you re letting cold air into the house. 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. Make sure there is air flow from the eaves. Ventilation can be accomplished using various products and techniques.

Intake vents located at the lowest part of the roof under. Obviously more research is needed but here s what we do know. 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. About attic ventilation natural attic 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. Guide to attic air ventilation adequate ventilation. This is normally the point where air enters your attic. The airflow from the soffits to the ridge vent keeps the roof cool and prevents ice dams and the material will block that flow.

Before we explore how to. For the same reason insulation shouldn t touch the roof s underside. In other words the entire vent opening doesn t count as vented space.