How Much Roof Ventilation Do I Need

Enter square footage calculate or enter the square footage of the attic or area to be vented.

How much roof ventilation do i need.

While hardly anybody agrees on the best roof ventilation system everybody agrees some roof vents do hardly any good at all. The answer depends on the type of roof you have. However we rarely think like that for roofs even though they undoubtedly require ventilation. Before we explore how to ventilate an attic space it is prudent to understand how much ventilation is needed.

How much ventilation does a flat roof need. 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. I have roof vents so i have roof ventilation. Ventilation of attic spaces is required by most building codes as well as by roofing material manufacturers and the national roofing contractors association nrca.

The majority of roofing experts agree that ridge vents are the most effective and cost effective roof vents available. Gaf attic ventilation calculator. 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. It depends on where the insulation is installed.

You would need almost 50 holes to equal one square foot of ventilation and a typical coop is going to need much more than just one square foot of ventilation. A cold roof or hot roof. Use this calculator to help determine the proper amount of attic ventilation based on u s. All you need to know about attic ventilation understand the pieces and parts that contribute to quality attic ventilation so that you can better cool down the space and prevent roof damage all.

Hot roofs have the roof deck then insulation then the roofing material. 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. It makes sense as all of us know that the most humid rooms in the house like the bathroom and kitchen need it. So no little round holes.

Take for example ridge vents. You want actual decent sized openings like 6 x 4 or 1 x3 or like that on most if not all of the walls. Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator. How much ventilation does a flat roof need.