Vents for Metal Buildings

metal building roof vents

It's particularly important to ensure that there is adequate ventilation and air-flow throughout your metal building. This helps keep the building cool in summer but there are other reasons for vents as well which we'll discuss below before going over the types of vents available.

Why Have Roof Vents?

Roof vents are essential for two main reasons. First, they allow hot air to escape from the building during the summer months. This helps to keep the metal building and its contents cooler. This also acts to prevent the formation of condensation on the roof.

Secondly, roof vents help circulate fresh air throughout the building. This is particularly critical during the winter months. Further, vents prevent mold and mildew from forming, as there is little to no chance of moisture or condensation accumulation. Also these vents act in the management of heat loss, and temperature integrity.

Types of Roof Vents

The Ridge Vent

Ridge Vents are installed along the roof's ridgeline, the topmost point along your roof. In this position, these vents while allowing hot or stale air to escape from the building need to be correctly installed. It may be best to employ a metal building expert, lest they begin leaking water when it rains.

The ridge vent does not take up alot of room, they blend in well and there are no moving parts due to any motors. This is a relatively small form factor while fitting onto the apex provides for good visual appeal. There are no hoods nor additional attachments which stick out nor that are attached to the roof. The ridge vent needs minimal maintenance.

Louver Vents

These vents are installed in the gable ends of the roof. This is also a popular option as the louvers tend to be adjustable. The blades of the vent can be angled whether up or down to preference at any point in time. This angling allows an adjustment in how much light and air can enter or exit the building.

These are also quite attractive, and inexpensive while being versatile. For example when the louvers are opened all the way to maximum, they let in quite a lot of light and air. When closed, the louvers overlap each panel and provide sealed protection against water, debris and any wind gusts.

These louvers can be mechanized as they are situated in the gable ends of the roof and therefore the angle of opening can be controlled by a button.

The Gravity Vent

Otherwise known as barn vents or globe vents, these types of vents are sturdy and have a multi-use cap. Ideal for sloped roofs, they have a metal band which prevents any crosswinds and rain from coming into the building. These types of vents tend to have a built in screen, which prevents bugs and other debris from entering.

The gravity vents, tend to be installed in those areas of the roof where there is a known breeze. Based on this position the natural ventilation can enter the building and act to eliminate any odors, or stagnant air.

Turbine Vents

These types of vents usually made out of aluminum metal act to pull air up and expel through the roof as the blades spin. As they spin in the wind with the relative breeze, they are a non-electric means of active ventilation. These are passive exhaust vents on windless days. The number of turbine vents tend to follow the rule of thumb of one vent for every 300 square feet of roof. With a constant wind speed of about 5 miles per hour, a small 12-inch diameter turbine vent can extract about 347 cubic feet of air per minute.

The beauty of the turbine vents is that they start to spin with the slightest breeze, and act to vacuum out any air, expelling it to the outside. These vents should not be insulated. Doing so can cause a likely build up of moisture and lead to fungi and molds. If anything, the general area around the building’s roof can be insulated.

Whether it is winter or summer, the hot air will rise and it will bring with it some water vapor. That vapor needs to be extracted by the turbine vent.

Proper ventilation is essential to the environment within a Metal building.

Roof vents play a vital role in the ventilation, so they should be carefully selected to ensure that the building offers ideal comfort to the residents. We hope this article has helped you understand why roof vents are crucial in Metal buildings. If you have any questions, please feel free to contact us.

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