How Much Roof Ridge Vent Do I Need

Take for example ridge vents.

How much roof ridge vent do i need. 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. The problem with gables is they short circuit the air flow paulcp writes. You may opt to only have one ridge utilized for a vent if there are multiple options on your roof but that can reduce the effectiveness of this system too. I cant seem to find much info on this venting method.

While hardly anybody agrees on the best roof ventilation system everybody agrees some roof vents do hardly any good at all. Soffit runs continuiously around house no upper vents ie. The whole point to a ridge vent is that it takes air from all along the bottom of the roof line and exits it out the top kind of like a toilet. A very popular way to provide adequate ventilation in an attic space is with a ridge vent sometimes called a continuous vent.

Of net free area of intake needed at or near the soffit. I have roof vents so i have roof ventilation. The shape of the roof impacts how much air comes through the system which means this vent must always be placed at the peak of the roof along your ridges. 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.

They should be divided equally between inlet and outlet vents and they can be used in any combination that will work with your roof s design. Even without soffit vents a ridge vent is much more effective than gable vents paulcp thinks hammer is right. The majority of roofing experts agree that ridge vents are the most effective and cost effective roof vents available. Rather than interrupting the roof line the way other raised vents do a ridge vent is so low profile that almost unnoticeable.

Roof vent types ridge vents. Florida house here built in 1997. The wood sheathing underneath the shingles on the ridge must be cut through to install your ridge vent. What is a ridge vent and does my roof need one.

Also thinking of a radiant barrier and or more insulation currently r19 any info would help thanks. Enter square footage calculate or enter the square footage of the attic or area to be vented. If your attic is 450 square feet you need roof vents equaling 3 square feet. Ridge etc do i really need upper vents or is soffit only ok.

Ridge static attic vents 384 00 minimum sq. Ridge vents run along the apex of your roof and are long and narrow. 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.