How Much Roof Ridge Vent Do I Need

Also thinking of a radiant barrier and or more insulation currently r19 any info would help thanks.

How much roof ridge vent do i need.

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. I cant seem to find much info on this venting method. Florida house here built in 1997. The problem with gables is they short circuit the air flow paulcp writes.

Enter square footage calculate or enter the square footage of the attic or area to be vented. The majority of roofing experts agree that ridge vents are the most effective and cost effective roof vents available. 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. Ridge static attic vents 384 00 minimum sq.

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. The wood sheathing underneath the shingles on the ridge must be cut through to install your ridge vent. Even without soffit vents a ridge vent is much more effective than gable vents paulcp thinks hammer is right. Ridge vents run along the apex of your roof and are long and narrow.

Roof vent types ridge vents. 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 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. Of net free area of intake needed at or near the soffit.

Take for example ridge vents. Of net free area of exhaust needed at or near the ridge. I have roof vents so i have roof ventilation. For the 1 150 attic ventilation requirement simply double the amount of exhaust and intake calculated.

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. Rather than interrupting the roof line the way other raised vents do a ridge vent is so low profile that almost unnoticeable. Soffit runs continuiously around house no upper vents ie. What is a ridge vent and does my roof need one.

To do this set the saw depth to the correct number based on how deep the wood and remaining shingles are. 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.