Roof Vent How Far From Peak

To calculate an example of exhaust and intake use 25 feet of roof ridge vent.

Roof vent how far from peak.

Where a roof is used for any purpose other than weather protection vents shall extend at least 7 feet above the roof and shall be properly supported. Asphalt roofing and nrca. Calculate 20 per cent more for 7 12 to 10 12 pitches and 30 per cent more for a pitch that is 11 12 or greater. They range in style from 6 inch round stainless steel vent covers that are placed in the soffit between each rafter to continuous vents that run the entire length of the soffit.

Vent pipes shall terminate not less than 6 inches above the roof measured from the highest point where the vent intersects the roof. But consider a moderately sized home whose attic space is 36 feet deep 50 feet long and 10 feet high at the peak. Taking advantage of this natural process referred to as passive ventilation is the most common way to vent an attic. We cut the vent in the roof decking sheathing to within a foot or 2 of the edge and always install shingle vent 2 right to the edge because most people think it s a cleaner look.

Multiply it by 18 square inches the net free air per foot of ridge. Vents evenly spaced underneath the roof provide intake. Distance matters the top of a chimney pipe must extend at least 2 feet above the peak of the roof if the pipe is within 10 feet of the peak. If the pipe is farther than 10 feet from the roof peak.

This gives you 450 square inches of total exhaust. 12 4 4 location of vent terminal. The venting in the roof should never be cut all the way to the edge but that doesn t mean you can t install the vent cap all the way to the edge. This attic space contains 18 000 cubic feet of air.

If the slope of your roof is greater than 6 12 you will need more ventilation to reflect the extra volume of attic space. A single 12 inch diameter turbine vent could provide a complete change of air in the attic space every 52 minutes if the outside breeze was just 5 mph.