Attic Ventilation Required

There are many different options available to provide adequate ventilation to your attic space.

Attic ventilation required. Feet of attic space divided 50 50 between the inlets and outlets. Before we explore how to. But considering attic ventilation has been required for over 70 years it continues to be one of the most misunderstood concepts in the roofing industry. And of course attic ventilation is still addressed in model building codes today.

Intake vents located at the lowest part of the roof under the eaves allow cool. For large volume attics such as where roof slopes are greater than 8 12 designers also should consider increasing the amount of attic ventilation to account for the additional. Industry standard for proper attic ventilation recommends for no vapor retarder type of attic insulation no paper plastic or aluminum layer between the attic floor and insulation layer 1 sq. Regarding attic ventilation nrca recommends designers provide at least 1 square foot of nfva for every 150 square feet of attic space 1 150 ventilation ratio measured at the attic floor level ceiling.

Ventilation can be accomplished using various products and techniques. Guide to attic air ventilation adequate ventilation. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.