Does My Attic Need Ventilation

That said air resistance and interference such as vent grates reduces the area of true ventilation.

Does my attic need ventilation. Determining what you need is simple all you need is the size of your house and a calculator. Intake vents located at the lowest part of the roof under the eaves allow cool. You can also contact your local municipality to check on building code in your area. The federal housing administration recommends at least 1 square foot of ventilation for every 300 square feet of attic space.

Roofing experts say the majority of u s. That is openings doors windows and louvers to the outside should create a. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. In other words the entire vent opening doesn t count as vented 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. Rafter vents should be placed in your attic ceiling in between the rafters at the point where your attic ceiling meets your attic floor. What does attic ventilation do for my home. Attic ventilation should equal approximately 1 square foot of vent area for every 300 square feet of.

Attic ventilation is an intake and exhaust system that creates airflow designed to decrease the difference in temperature between the outdoor air and the air inside the attic. Ventilation of attic spaces is required by most building codes as well as by roofing material manufacturers and the national roofing contractors association nrca. If your attic is enclosed california s building code states it should have cross ventilation. Homes do not have proper roof ventilation which can lead to severe roof damage.

Effective ventilation provides year round benefits creating a cooler attic in the summer and a drier attic in the winter. This prevents hot air from seeping into your home and driving up the temperature in the living space which reduces the load on your air conditioner. Once they are in place you can then place the batts or blankets or blow insulation right out to the very edge of the attic floor.