What Is Commercial Roofing? Key Points and Licensure Explained

Commercial roofing is the installation, repair, and maintenance of roofing systems on commercial buildings such as offices, warehouses, and retail centers. It's one of the most profitable avenues for roofers because of the high wages. However, it's not a pie that everyone can dip their fingers into.

Commercial roofing repairs and installations require specialized materials, drainage systems, and installation methods. This skill threshold prevents most new roofers from pursuing commercial roofing. In this guide, we'll explain commercial roofing, jobs, businesses, and prospects to make your journey as simple as possible.

What Is Commercial Roofing?

Commercial roofing refers to roofing systems designed and installed on commercial properties, such as office buildings, schools, retail stores, and others. Unlike residential roofs, commercial roofs are flat or low-sloped.

Commercial roof installations require specialized materials that support long-term performance and efficiency. You'll need a commercial roofing license to work on any commercial project across most US states.

How Can You Become a Commercial Roofer?

To become a commercial roofer, you need to get the necessary license. In Illinois, you'll need to acquire an Unlimited License by passing the Illinois roofing exam. Unfortunately, the Illinois roofing exam is hard for first-timers because of its format and extensive requirements.

At Illinois Roofing Institute, we prepare you for the exam and everything that comes after it. We give them the blueprints to succeed as commercial roofing contractors in the ever-changing industry. Join our roofing classes today and kickstart your commercial roofing career.

Where Are Commercial Roofing Services Used

Commercial roofing systems are used in various building types, such as:

• Shopping malls and retail stores
• Factories and warehouses
• Hospitals and medical centers
• Apartments
• Offices and high-rise buildings
• Schools and universities
• Government buildings

These types of roofing projects often have a greater roofing net profit. It's why commercial roofers make more than residential roofers. You'll have to learn about different marketing channels to get commercial roofing jobs.

What Are the Types of Commercial Roofing Systems?

Commercial buildings come in all shapes and sizes, so do their roofs. While some commercial roofs are low-sloped or flat, others might have a steep slope. Here's a closer look at the different types of commercial roofing systems:

1. Low-Slope Roofs

A low-slope commercial roof is typically the most common type. It's a flat roof but has a slight angle to help with water drainage. These roofs are common in:

• Warehouses
• Distribution centers
• Commercial garages

These commercial roofs often require precise drainage planning and waterproofing layers to prevent pooling. 

2. Flat Roof Systems 

This is another popular choice for commercial properties, and there are various reasons backing its popularity, such as:

• Offers space for HVAC systems, vents, and solar panels. 
• Cost-efficient for large surface areas.
• Provides easy access and maintenance.

3. Pitched Commercial Roofs

This is more common in modern commercial designs, but mostly smaller properties go for it, such as small retail stores, churches, or schools. It uses a steep-slope roofing system and uses the following materials:

• Asphalt shingles
• Metal panels
• Tiles or synthetic materials

These commercial buildings may seem more aesthetic and offer easier visibility from street level.

4. Built-Up Roofing (BUR)

Built-up Roofing system, or BUR, is among the oldest commercial flat roofing systems. It consists of multiple layers of bitumen (asphalt) alternated with reinforcing fabrics, topped with a gravel or reflective coating to make 2-ply roofing systems. It's best for flat roofs in high-traffic, and offers high durability.

You must have an understanding of all these materials to become a licensed roofer. It's why we recommend novices to join a roofing apprenticeship. It gives them first-hand experience at handling these materials and making the right judgements.

5. Single-Ply Membrane Systems (TPO, EPDM, PVC)

Single-ply membrane is widely used due to its cost-effectiveness and quick installation. These roofs use flexible membrane sheets that are heat-welded or glued into place. It requires a high skill level to install and manage.

6. Metal Roofing Systems

Metal roofs are typically made of steel, aluminum, or copper panels. These are widely popular in sloped and low-sloped commercial and residential roofs. These are best for long-term commercial roofing systems and residential roofs, warehouses, and schools.

Metal roofing is one of the most profitable specializations for roofers. If you want to become a licensed metal roofer, join our classes today. We walk you through every step of the process and 

7. Green Roofing Systems

Green roofs are among the most popular commercial roofing types due to their sustainability and eco-friendliness. They help improve insulation and feature vegetation. Moreover, they reduce the building's heat island effect.

What Are Common Commercial Roofing Materials?

A great commercial roofer should know everything about the required roofing materials. Here's a brief breakdown of the common commercial roofing materials:

1. TPO (Thermoplastic Polyolefin)

TPO is a single-play white membrane that reflects UV rays, and it's best for large flat roofs and energy-conscious businesses. TPO roofing membranes are lightweight and energy-efficient. Moreover, these roofing materials are heat-welded, offering waterproofing during harsh weather conditions. 

2. EPDM (Ethylene Propylene Diene Monomer)

EPDM roofing features a durable synthetic rubber membrane that's known for its flexibility and weather resistance. It's easier and cheaper than other membranes.

3. PVC (Polyvinyl Chloride) Roofing 

PVC is best known for its durability, fire, and chemical resistance. Plus, their heat welding makes them lightweight and easy to install. These are commonly used in restaurants and chemical facilities.

4. Metal Panels

Metal panels are widely used by residential and commercial roofers due to their durability and lifespan. They can be installed on flat or step-slopes, and are low-maintenance. Metal panels, such as Aluminum, are best for warehouses, schools, and industrial buildings.

5. Built-Up Roofing (BUR)

These are multiple layers of asphalt topped with gravel to resist fire and ensure the durability of the commercial or industrial roof. It's heavy and labor-intensive to use BUR, but these are ideal for large commercial buildings looking for long-term durability.

6. Modified Bitumen Roofing 

This roofing material is similar to BUR, but with added polymers for flexibility and weather resistance. It's installed using torch-down, cold adhesive, or peel-and-stick methods. This material is best for commercial roofs looking for extra flexibility and impact resistance.

FAQs About Commercial Roofing

What is the meaning of commercial roofing?

Bottom Line on Commercial Roofing

Commercial roofing refers to the installation, repair, and maintenance of commercial roofs, such as schools, offices, hospitals, restaurants, and retail stores. Meanwhile, the material used primarily focuses on ensuring the strength and efficiency of the roofs.

 Unlike residential roofs, commercial roofs are on a larger scale and focus on the durability of the roof during harsh weather conditions. Becoming a commercial roofer is more tedious, which is why most novices avoid the field.

You don't have to abandon your dreams, because we'll help you. At Illinois Roofing Institute, we teach you everything about commercial roofing and acquiring its license. Join our classes and become a commercial roofer today.