Since you’re not a professional builder, you may have a question in your mind, what is a roof curb? Well, don’t be concerned. Just have a look at this article.

A roof curb is a framework used to attach mechanical devices to your roofs, such as air conditioners, skylights, exhaust fans, and other similar items.

The roof curb aids in the supporting of these pieces of machinery. Varieties of roof curbs are available on the market. Furthermore, these roof curbs are easy to install.

Stay with us to learn more about roof curbs.

What Is A Roof Curb? 

If you wish to add new devices to your homes, such as an air conditioner or an exhaust fan, you won’t be able to do so without a roof curb. You must first install a roof curb, after which you can attach the equipment to the roof curb. As a result, your home will be safe from water damage.

Let’s discuss the main components of a roof curb. The roof curbs are mainly composed of different metals. They are as follows:

  • Galvanized steel: This is eighteen-gauge and fourteen-gauge steel that has been zinc-coated to prevent corrosion.
  • Aluminum: Aluminum sheets with a thickness of.080 and.063 inches.
  • Galvalume: It is 55 percent aluminum and zinc alloy coating on eighteen-gauge and fourteen-gauge sheet steel.
What Is A Roof Curb

Before installing roof curbs, you should know how many types of roof curbs are available on the market. Take a peek at them.

Shielded rooftop curbs: Such roof curbs typically use three-pound insulation to keep out the coldness in the wintertime as well as the heat in the summer.

Metal roof curbs: These are specifically made for metal roofs. They are composed of Galvalume metal and are simple to install on a metal roof.

Pipe curbs: Usually 14 inches in height and designed with boot pipe breaching systems are a popular choice.

Catwalk roof curbs: They are commonly known as platform roof curbs which are employed to hold large equipment such as power transformers on the roof.

Now come into the installation process of the roof curbs. As I said before, the process to set the curb is very simple. Let’s check them out.

You have to manage some tools before going to the installation procedure. These tools are:

  • ladder
  • screws
  • caulk
  • adhesive tape
  • cutter
  • marker pen

Step 1: Cut a hole in the roof and trim it.

Climb up the roof with a ladder, then place the roof curb and indicate the area you wish to cut with a marker pen. Cut a hole in the roof and trim it after you’ve marked it. Clean up the area thoroughly.

Step 2: Apply sticky tape to the surface

After cutting and cleaning the indicated area, the border of the hole is taped with adhesive tape such as butyl tape. Remove any excess adhesive material and place it in the right location.

Step 3: Set the roof curb

Place the roof curb on the adhesive tape and make sure it’s properly attached. If not, use screws to secure it.

Step 4: Fill up the gaps around the edges with caulk.

Finally, apply caulk around the periphery to ensure a tight seal.

roof curb installation

The roof curbs are already known to you. Let’s explore some of the possibilities for these roof curbs.

Exhaust fans: These fans force air from inside the home out into the outside air, keeping the house comfortable to live in. A roof curb is required to firmly install these fans.

Skylight vents: Skylight vents aid in the proper passage of light into the home.  These vents are mounted on the roof curb.

Hatches: To get access to the roof, hatches are needed. Roof curbs are used to attach the hatches. 

Air conditioners: Without a roof curb, it is not possible to install air conditioners units.

Smoke vents: Smoke vents are put on the roof curbs to help ventilate the building’s harmful fumes.


Have you got your answer to the question, “what is a roof curb?” I genuinely hope so. You are not more confused about the roof curbs, right?

When it comes to making renovations to your home, roofing curbs are a must. Roof equipment such as an exhaust fan, air conditioner, skylight, and smoke vents, among other things, cannot be installed without roof curbs.

Roof curbs come in a variety of styles. If you have a metal roof, you should consider installing metal roof curbs.



As a civil engineer and roofer, I love to share the experience that I have gained through the last couple of years. In the roofing industry, practical experience is a very crucial fact that can help you a lot. Hence, I want to help you with my blog.

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