Roof Ridge Vent Caps for Proper Ventilation

Ridge_VentRidge vents are another form of passive roof vent that you can use for your attic ventilation. These vents are installed along the peak of the roof line of your home. As the air gets warmer in your attic, it gradually rises and pulls fresh, cooler air from the soffit vents.

This allows the hot air to escape through the ridge vents, decreasing the overall temperature of your attic. Ridge vents are preferred by some people because they can vent out air more efficiently, since they are placed along the highest part of your roof and they allow the air to travel upwards.

With ridge vents, the air in the attic does not need a roof vent to escape, since the air will naturally move upward and out along the roof peak. Both ridge and soffit venting provide a natural and efficient air-flow system to ventilate your attic. They work best when installed on steep slope roofs, so that the vents can utilize the airflow. When they are installed on low-sloping roofs, the air tends not to evacuate the vents as efficiently.

Roof Turbines

A roof turbine is a large round exhaust fan that sits on top of your roof to help ventilate your attic and home. Many rooftops usually require at least one of these for adequate ventilation. As with the ridge vents, roof turbines are another type of passive air ventilation system which requires only the wind to turn the fan and remove air from the attic.

Roof turbines can expel a high volume of air very quickly as long as they are provided with plenty of wind. A small turbine vent that is 12 inches in diameter with a constant wind speed of at least 5 miles per hour can remove approximately 347 cubic feet of air from an attic every minute. As the wind speed increases, you will notice even better results.

However, there is one drawback to using these turbine vents, which is, that air flow can become restricted when the winds quiet down as compared to other types of passive roof vents. This is because there is less area for the air to pass through. If you have only one or two of the turbines on your roof, the air may get backed up when it has to funnel through a smaller space instead of using a few low profile vents or ridge vents. Another drawback is that, for some people, the turbine exhaust fan can appear rather unsightly, since they are very large.

Power Vents

Power vents use electricity or solar energy to ventilate your home and attic. As such, they are considered to be an active ventilation system. Power vents work by powering a fan to draw air out of the attic. This can be a more effective way to ventilate an attic, especially when there is little wind available. Solar power vents are good for energy savings as they cost little to nothing to operate. These roof vents can help you save money on your air conditioning bills by forcing out hot air in the attic during the summer months, resulting in less energy being required to cool your home down.

Ventilation Options For Your Attic

Maintaining the integrity of your asphalt shingle roof often depends on having proper ventilation and air flowing through your attic. If air is not circulating properly throughout the attic, moisture can accrue from the stagnant air, eventually turning into condensation which can damage the interior of your home and the roof deck. For this reason, having a proper environment in your attic is essential for protecting the longevity of your home and roof.

roof-ventilationThe Essentials of Proper Attic Ventilation

There are three essential components to properly constructing an attic and ensuring that it has a healthy ventilation system. Good roof vents are very important for promoting continuous airflow throughout the attic. In addition, soffit vents and adequate insulation are also key components of a well-functioning attic ventilation system.

To have a properly functioning ventilation system, air must flow into the attic through the soffits, which are normally located under the eaves of the roof. The air then circulates throughout the attic and flows up and out through the roof vents in the upper portion of the roof. Having adequate insulation in the interior walls of the home is important because it prevent heated or cooled air inside the home from escaping through the attic. You also need to ensure that you have properly sealed attic floor penetrations around the hatchways and the exhaust fans in the home.

Damage From Stagnate Air and Trapped Moisture

When air is flowing properly through the soffits and out through the roof vents, moisture will not get trapped in the attic and form condensation. However, when these safeguards are not in place and air is allowed to become stagnate, condensation will form in the attic, causing mildew and wood rot to develop in your roof deck. This condensation can even get into the insulation and leak through the ceilings of your home. In the winter months, it can cause snow on the roof to melt and form streams of water under the ice that flows back up through the roof shingles and leaks into your home.

Having Low Profile Roof Vents

Normal low profile roof vents have approximately 50 square inches of vent area that is net free and can be placed in equal spaces along the upper part of the slanted roof in the back of your home. These vents are specially designed to keep out water that may run down the roof during rainy weather and are fully enclosed with louvers to keep out birds and other animals. A roofing contractor can calculate the square footage of your attic space to determine the best number of roof vents that you should install.

According to the U.S. Federal Housing Administration, it is recommended that at least a square foot of attic ventilation is placed for every 300 feet of space in your attic. So, if your attic is 900 square feet, you need at least 3 square feet of ventilation for adequate coverage. This amount should be equally divided between the intake and exhaust ventilation to ensure proper air flow throughout the attic.

Low profile roof vents are considered to be a passive form of roof ventilation since they are not powered to pull air out of the attic, but only to allow air to escape on its own. Instead, the wind and natural breezes pull the air out of the attic.

If you would like to speak to someone about the details of slope VS ventilation, or for any Vancouver roofing questions click the link and call these guys.