Choosing the right metal roof ridge vent closure can be a difficult task. There are many different types to choose from, and the choice is often made based on personal preference.
However, there are some important factors that should be considered before choosing your roof ridge vent closure: protection of ventilation and attic space, energy efficiency (both in terms of heat loss and air conditioning), ease of installation, appearance.
In this blog post we will discuss these points to help you make an informed decision about which type of roof ridge vent cap is best for you!
What is a Metal Roof Ridge Vent Closure
A roof ridge vent closure is a device that closes the space between a metal roof and a ridge vent. It is designed to interrupt air leakage through the open space, reducing energy loss from the building.
In order for it to close tightly against wind driven rain or snow, it must be watertight. The roofing manufacturer should provide details on how to install the roof ridge vent closure.
In most cases, a separate piece of material called a roofing underlayment is nailed in place over the plywood or OSB roof deck before the metal ridge vent closure is installed.
When the metal pieces are cut and bent to fit together around the apex of the ridge, it leaves a gap that is sealed by the underlayment.
Asphalt shingles are usually nailed to the roof deck over the whole surface, including over the metal ridge vent closure.
The nails should be placed closely together to ensure that wind driven rain or snow doesn’t get through any gap between the roof sheathing and the metal pieces.
It is also a good idea to flash the roof ridge vent closure with drip edge, so that water runs down the eave and doesn’t get inside at the top.
Different Roof Ridge Vent Cap
Roof ridge vents are manufactured in several different types of materials including galvanized steel, aluminum, steel with a baked enamel finish and stainless steel.
They may be sold as closed units with end caps or as separate pieces, with the option to open them for ventilation.
They are available in different shapes and sizes, depending on the pitch of the roof they are intended for.
Metal manufacturers who sell ridge vents will provide installation instructions that should be read carefully before purchasing one.
Galvanized Steel – These metal ridge vents are made of low carbon steel and come with a zinc coating to protect the metal against corrosion.
They need to be painted with an exterior grade paint after installation, but this is optional.
Aluminum – These ridges are more expensive than galvanized ones, but they do not require repainting annually, if at all. They are highly resistant to corrosion.
Steel with a Baked Enamel Finish – These ridge vents are very similar to aluminum ones in that they do not require repainting; however, they do tend to fade over time.
Stainless Steel – Made of high quality steel alloy, stainless steel ridges come with an exterior grade coating which, like aluminum and steel with a baked enamel finish, do not require repainting.
Other Types – There are also ridges made of plastics, such as lexan or pvc, which may be used to replace plastic shingles on various types of roofs.
Please note: The installation instructions should be followed carefully when installing ridge vents. Improper installation may result in water leakage and damage to the roofing structure.
Variations of Roof Ridge Vent
Manufacturers produce metal ridge vents in different shapes and sizes according to the pitch of the roof they are intended for. The different types available include:
Roof Ridge Vent Foam – This common type of metal roof ridge vent is relatively inexpensive, simple to install and comes with a protective coating that will give it an extended life. Foam fills the gaps around the vents to keep out water.
Roof Ridge Vent Mesh – These units are very similar to the metal ridge vents with foam, but they also have a steel mesh that helps keep out larger pieces of debris.
Roof Ridge Vent Closure – When a ridge vent is not necessary, a simple ridge closure can be used. These consist of pieces that are laid over the peak and secured with caulk or screws.
In some cases, self-adhesive strips can also be used to seal off the top of ventilation pipes from water leakage. They come in rolls with an adhesive surface on one side and a protective film on the other.