Roof vents are instrumental in maintaining a comfortable home environment while also providing energy efficiency, which can lead to cost savings. By facilitating the escape of hot air, they enhance the coolness of a house and alleviate the workload on cooling systems.
Ridge vents work without any power. They're super awesome when paired with soffit vents, creating a cool airflow loop - cool air enters through the soffit vents, and the hot air exits through the ridge vents.
While ridge vents have many advantages, they are not always ideal. In cold climates, ridge vents can allow snow into the attic. They're also more expensive than box vents and won't work on all types of roofs.
Some of it should flow up under the roof sheathing to keep it cooler, then exhaust out near the peak of the roof. This airflow out of the roof peak keeps it cooler during summer and much colder during winter to minimize condensation and ice dam formation.
By some estimates, having good ventilation on your roof can help reduce cooling costs by 30-40%.
If you had to choose just one—and your attic has a great need for ventilation—an attic fan is your best bet. Attic fans in the $300 to $400 range can move upwards of 5,000 CFM. For lower capacity ventilation at a steep cost savings, a ridge vent might be your best choice.
It is absolutely possible the ventilation system on your roof is excessive. Maybe your home is older and prior ventilation was installed by a homeowner, or incorrect vent sizes were used in an older roof layout. Too much ventilation can negatively influence the attic's and home's insulation as well.
Ridge Vents are popular. They work well because they provide even ventilation across the whole attic. They are installed along the roof's peak, allowing hot air to escape naturally without the need for power.
Now, from the example above, with 75 degree air being pulled in at the air filter, what temperature should we expect to be blowing out? Well, the general consensus is somewhere between 14 to 20 degrees colder than the intake temperature. From my example, 55 to 61 degrees would be an acceptable range.
Installing a roof ridge vent costs $500 on average, but it can cost between $200 and $1,000, depending on size, labor costs, and roof specifics. A ridge vent costs between $300 and $650 on average, with most people paying about $500. Your final costs will vary based on the size, type, and number of units you install.
Look Out for Flashing
In this case, rain can enter your roof through the vents. As for damage to the vents themselves, old age is a factor. Eventually, certain areas of your roof may be worn down, including the flashing that supports ridge vents. You will likely be unable to predict when your flashing is going to fail.
Unlike most other roof vents, the amount of ridge vent is calculated per linear foot. The standard ridge vent without a baffle is 4 feet long and covers 72 square inches of net free area. With that in mind, you'll need a total of 20' of ridge vent to ventilate a 1,500 square foot attic properly.
In most cases, we recommend soffit vents for intake and a ridge vent for exhaust. For homes that cannot have a ridge vent, box vents are generally the second best option for exhaust. And for homes that cannot have soffit ventilation, you will find that fascia vents to be your second best bet.
Ridge vents are very popular, and local roofing contractors often recommend them because they are extremely effective at keeping attics well ventilated, especially when they are part of a passive ventilation system that has enough intake vents to draw air in and help force hot, moist air out.
While each type—metal, hard plastic shingle-over, and soft foam shingle-over—has its merits, the hard plastic 4-foot shingle-over ridge vent stands out for its unparalleled air exhaust capabilities, making it an excellent choice for homeowners seeking optimal ventilation performance.
The average lifespan of a roof vent is about 10-20 years, but the lifespan of your roof vent will depend on a variety of factors. Some factors that will affect the lifespan of your roof vent include the type of roof vent, the material your roof vent is made from, and the care your roof vent receives.
For many of us, 70 degrees is the ideal indoor temperature, but when it is close to 100 degrees outside, your AC unit will be working quite hard to meet these expectations. Consider setting your thermostat at 75 degrees to 80 degrees in your home if the outside temperature is approaching triple digits.
In conclusion, Positive Input Ventilation (PIV) systems do not make your house cold. They are designed to maintain a healthy indoor environment by controlling humidity and preventing issues like condensation and dampness.
Cooling a house from 80 to 72 degrees is a common goal for many, especially during the peak of summer. On average, this process takes roughly two and a half to three and a half hours.
Roof vents, including the effective ridge vents, allow this hot air to exit, while cooler air is drawn in through intake vents, usually positioned at the lower parts of the roof. This continuous exchange of air ensures that the attic remains relatively cool.
Ridge vents are one of the most effective ways to keep your roof in tip-top shape. With the above points, we learned that ridge vents help to draw hot air out of your attic, which helps prevent moisture buildup and can prevent mold from growing on the underside of your shingles. They also prevent pests.
Nine times out of ten, the ridge vent system is better for a roof because it pulls air from the whole surface under the roof decking. It also doesn't rely on electricity, and it can't break down unbeknownst to you. It also has a smaller profile, which means it will blend in with your roof more.
Even the slightest deviation from the recommended installation procedures can compromise the ridge vent's performance and longevity. An improperly installed ridge vent may fail to provide sufficient ventilation, leading to trapped hot air, moisture buildup, and potential energy inefficiency.
The short answer to this question is “it depends”. Some form of ventilation is necessary for every roof, and a ridge vent is one of the most common ventilation options. However, depending on your specific roof, one of the other types of roof vents may be a better choice.
Ridge vents are ideal for large, uniform roofs, while off-ridge vents are suitable for smaller or irregularly shaped roofs. If energy efficiency is a priority, ridge vents are generally more effective at reducing attic temperatures and lowering cooling costs.