How Much Roof Ventilation Do I Need

Use this calculator to help determine the proper amount of attic ventilation based on u s.

How much roof ventilation do i need.

I have roof vents so i have roof ventilation. It makes sense as all of us know that the most humid rooms in the house like the bathroom and kitchen need it. Enter square footage calculate or enter the square footage of the attic or area to be vented. Hot roofs have the roof deck then insulation then the roofing material.

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. 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. Ventilation of attic spaces is required by most building codes as well as by roofing material manufacturers and the national roofing contractors association nrca.

Before we explore how to ventilate an attic space it is prudent to understand how much ventilation is needed. A cold roof or hot roof. The majority of roofing experts agree that ridge vents are the most effective and cost effective roof vents available. 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.

So no little round holes. Any type of roof from tpo to epdm can be either hot or cold. 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. Ventilation can be accomplished using various products and techniques.

How much ventilation does a flat roof need. Gaf attic ventilation calculator. How much ventilation does a flat roof need. Take for example ridge vents.

However we rarely think like that for roofs even though they undoubtedly require 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. 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. You want actual decent sized openings like 6 x 4 or 1 x3 or like that on most if not all of the walls.