Does A Zinc Roof Need Ventilation?

Zinc roofing is a common type of roofing in most homes. As a homeowner, you might prefer zinc roofing to other types of roofing and you are wondering if this type of roofing would require a ventilation system. You've come to the right place as we have made thorough research to answer your question.

Yes, zinc roofs, just as other metal roofs, need ventilation for proper efficiency. When there is no proper ventilation, the change in temperature can lead to an accumulation of vapor or condensation trapped in a particular area. This can lead to corrosion and damage to the zinc.

In order to understand why it is necessary to install ventilation for a zinc roof, you should continue reading as we would talk more about the advantages and how to install one.

metal sheet of zinc roof on the top of the house, shiny silver colored roof, Does A Zinc Roof Need Ventilation?

Do You Need Ventilation With a Zinc Roof?

Yes, you should vent your zinc roof. Zinc roofs are known to manage heat better than other materials by repelling the rays of the sun, but they are best supplemented with a ventilation system. Here are some reasons to install ventilation with a metal roof:

To Reduce Summer Heat

Ventilation, such as static ventilation, helps regulate the temperature in the summer by balancing the amount of hot air and cool air in your residence. 

Prevent Winter Ice Dams

Ice dams are a major concern in the winter season, especially in places that are weathered by extreme temperatures. Ventilations would prevent forestall ice dams from forming. 

To Save Energy

Proper ventilation guarantees that your metal roof will prevent heat from building up. By this, you do not have to expend more to cool your residence and thereby you use energy efficiently. 

To Control Humidity

Appropriate ventilation can help control humidity stored up in roofing due to the release of water into the atmosphere. You should know that when you do your laundry, your dishes, or when you cook or shower you release water into the atmosphere.

This water vapor moves upward, accumulates in the roof space, and soon causes structural breakdown due to the growth of mildew and mold. Venting your roof space would prevent such complications. 

Effective ventilation also protects your roof from damage from moisture and heat. This would in turn maintain its efficiency and durability. 

Why Do Some Metal Roofs Have No Vents?

metal roof, zinc roof, grey colored roof, slanting roof

In certain instances, metal roofs are installed without vents. This is because metal roofs can be somewhat effective without vents. However, to ensure the optimization of metal roofs and to protect your roof space, you should install a ventilation system. 

How Do You Install Air Vents on a Metal Roof?

Installing air vents may be burdensome, but following these step-by-step procedures would make it easier.  

  1. You should decide the roof area to locate vents. You would then prepare it. Also, consider the size of the air vents in preparing this area. 
  2. You may want to use a chalk line or marker to define the length and the breadth of the vent.
  3. Ensure you accommodate extra space for the edge of the air vents. A measuring tape and a notepad would be handy here- to measure the width and length and to record your projections. 
  4. You should carve out the outline. Use a chainsaw till the gap allows you to be able to see into the insides of your roof space. 
  5. Once carved, trim the area and affix the vent into its position. Fix the screws that accompanied the vent.
  6. If the vents do not have starter holes you should drill one yourself. Apply tar to the outer edges of the vent to secure it. Then move to the inside of the roof space and apply more tar to the other side. Place the cover accompanied in the installation kit and hold it firm with the included screws. 

Ensure you take each of these steps one at a time as you affix the vents around your roof. It is important that you pay attention to each step.

Why Do Metal Roofs Have Ridges?

Metal roofs have ridges because they permit humid and warm air to leave the roof space. The essence of a ridge in your metal roof is to facilitate air movement at the elevations.  

Are Zinc Roofs Good?

Zinc roofs are an excellent choice to cover your building. While some experts disagree on what is the coolest roofing material, most suggest that metal roofing, especially when painted white, is the best material. Here are some of the essential advantages of zinc roofs:

Advantages of a Zinc Roof?

photo of a zinc roof of a modern house, grey painted zinc roof

Zinc roofs are one of several metal roof types. Metal roofs have been around for more than three centuries now. This is because of the tremendous benefits provided by this type of roofing. Some of these benefits include the following: 


Metal roofing is an ideal material if you are looking for a roof that lasts long. Zinc roofs are very durable as they can last beyond 70 years. With the exception of copper, zinc roofs last longer than most roofing materials. The life expectancy of a zinc roof varies depending on use, atmospheric conditions, and other phenomena.

Little Maintenance

A zinc roof requires little maintenance compared to other roofing. Zinc roofs are oxidated through patina to prevent rust and the growth of fungus, mildew, and mold. Zinc roofs become resistant after going through an oxidation process, resulting in the formation of patina which covers the surface of the zinc roof. 

Since its surface resists rust, zinc roofs need very little maintenance. Once you install a zinc roof, you do not need to do any major maintenance from time to time. Metal roofs are very efficient covers from elements.

Using metal roofing would guarantee that you are shielded from debris, snow, and rain. Less heavy-metal roofs are lighter than other roofing materials and contribute to the maintenance of your infrastructure by providing less exertion on its structure

Sound Protection and Aesthetics

Zinc roofs are naturally fortified to withhold sounds, and are useful in reducing noises from fire, lightning, and wind.  After passing through an oxidation process, zinc roofs change colors and develop an appealing appearance.

Because zinc roofs are malleable, they can be formed in several shapes. This gives them aesthetic value and is the preferred material among builders.

What Are The Disadvantages of Zinc Roofs?

While zinc roofs are very beneficial, they are not without their disadvantages. Here are some you should know.

High Cost

Zinc roofs have a relatively high cost compared to other roofing materials. The price per square foot of a zinc roof varies between $6 and $9. The cost of installment per square foot varies between $12 to $18, making the total expense per square foot between $18 and $27.

Slow Oxidation

Zinc roofs pass through an oxidation process which allows the development of patina which prevents rust and fungi. Zinc roofs however take some time to develop this outer layer patina.

Unfortunately, how soon a zinc roof develops patina cannot be ascertained or determined. The earliest time is two years. But it can take up to 30 years.

Technical Installation

Zinc roofs require technical and professional installation. If your zinc roof is not installed properly, this could lead to damage to the entire roofing system. 

How Do You Cool Down a Zinc

zinc roof of a modern house building, zinc roof room, metals sheets

Zinc roofs are susceptible to heat and it is important that you cool them down. Here are certain systems that can be installed  to cool down your zinc roof: 

  1. Design the zinc roof to be lofty and airy to ventilate the warm air. This assists with ventilation and is one proactive method to cool down your zinc roof. 
  2. Make your zinc roofing lucid. Not installing a ceiling can help dissipate heat. 
  3. Install a cooling system. If you prefer a ceiling with your zinc roof, a cooling system in your roof reduces the temperatures. There are several types of cooling systems that can be installed in your roof space but an air conditioning system is the most suitable. 
  4. Install Insulations. Insulations help prevent the transmission of heat energy and can significantly help in cooling your zinc roof. To enjoy the full benefits of insulation, you should install insulation in your ceiling, on the top of your zinc roof, and on your walls.


metal sheet of zinc roof on the top of the house, shiny silver colored roof

Zinc roofing is a popular and durable type of roofing. However, it comes with its advantages and disadvantages. To get the most out of your zinc roof, make sure it is properly vented.