Top 6 Types of Commercial Roof Materials
When it’s time for a new roof installation, many business owners begin to panic. A roof replacement is an expensive investment – and how do you know which roofing solution is right for your property?
While there are many flat roof options on the market, building owners often replace their roofs with the same material, potentially missing out on more durable or cost-effective alternatives. While others rush through selecting their new flat roof, if you take the time to familiarize yourself with the most popular types of commercial roof materials, you ensure you make the best choice for your property.
What to Consider When Choosing Commercial Flat Roofing
When selecting a low-slope roof for your commercial building, consider key factors: lifespan, durability, energy efficiency, cost, and how the material performs in specific conditions.
With proper installation and maintenance, commercial roof systems can last anywhere from 20 to over 70 years, depending on the material. Keep in mind extreme climates and sub-roof conditions may decrease or increase these estimates greatly. You can also extend that lifespan with the right kind of roof coating.
An energy-efficient roof can lower your utility bills by making heating and cooling easier. You may also qualify for tax credits if your new material qualifies as a cool roof.
And of course, you’re going to want to make sure your new roofing project matches your budget. While there are financing options available for roof installations, you want to make sure the cost of your roofing services doesn’t threaten your bottom line.
But if you put cost above all else and select a roofing material that doesn’t work well with your commercial property’s environment, you may end up paying for a new roof twice.
Types of Commercial Roofing Systems
1. Metal Roofing
Durable metal roofing is a very popular commercial roof type because of its long lifespan. Typically they last at least 40-70 years, but properly maintained, quality metal roofs can last more than a century.
There are two types of metal roofing typically used for commercial applications: standing seam and exposed fasteners. Standing seam roofs have concealed fasteners, making them less prone to leaks, but it is more expensive to install.
Common metal commercial roofing materials include:
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- Corrugated galvanized steel
- Aluminum, zinc, and tin
- Tile sheets
- Copper
- Aluminum
- Coated or stainless steel
Metal roofing is durable, has a high fire resistance, and is extremely effective in reflecting ultraviolet rays. With a white coating, metal roofs are so effective against UV rays they’re considered one of the most energy-efficient roofing materials on the market.
Metal roofs can be susceptible to corrosion, particularly in humid and coastal environments. Because of this issue, modern metal roofs have protective coatings added to manage damage from exposure, moisture, pollution, and other environmental factors.
Metal roofing systems are also the most expensive material to install. However, while it has a high upfront cost, its long life and its low maintenance costs save you money in the long run.
2. Built-up Roofing Membrane
Built-up roofing has a lifespan of 20 years or more with care, and it is made by alternating layers of tar and gravel. The number of layers affects durability and (ultimately) cost. It is inexpensive and easy to repair and is one of the oldest and most flexible roof types.
This seamless roofing type withstands foot traffic but relies on a stable understructure to support weight and absorb vibrations. It is UV-resistant and may be coated to reflect heat.
However, BUR roofing’s lifespan is one of the shortest around and it can be difficult to identify the source of a leak as the roof ages.
3. Modified Bitumen Roofing
Modified bitumen roofing systems are a time-tested solution for low-slope roofs. They’re similar to asphalt shingle roofing used on steep slopes and are very cost-effective. Modified bitumen is made from asphalt with added materials such as rubber or plastic and reinforced with fiberglass.
Other benefits include strong resistance to extreme weather conditions, UV radiation, and punctures. Modified bitumen can be adhered to your roof deck through several methods, including torch-applied, cold-adhesive, or self-adhesive.
It can be hard to install, especially when it comes to torch-applied systems. You don’t want an inexperienced roofer to handle torch-down applications because it can result in a fire. The seams can be vulnerable to splitting, so you need to perform regular roof inspections to check their condition.
4. Thermoset EPDM Membrane
Ethylene Propylene Diene Monomer (EPDM) is a roll-based, durable synthetic rubber roofing membrane. Also known as Thermoset roofing, an EPDM roof system offers strong resistance to sunlight and pollution.
It’s long-lasting, versatile, and easy to install. It’s also one of the most waterproof commercial roofing systems available. EPDM is available in white and black single-ply membranes, offering resistance to sunlight, pollution, and common solvents like alcohol and acids.
EDPM can puncture easily. It’s also not one of the best-looking materials the roofing industry has to offer. However, its heightened waterproofing does make it a great option if you’re planning on installing a green roof.
5. PVC Roofing
Polyvinyl chloride (PVC) is a single-ply roofing system that stands up well in adverse conditions. UV light, chemicals including fats and oils, or bacterial growth are all slow to damage these types of roof membranes. It’s a popular choice for restaurants and industrial buildings, as well as buildings in humid climates.
They are lightweight, heat-reflective, and puncture-resistant. They also have strong air-welded seams, high fire resistance, and a tolerance of both high temperatures and high winds.
PVC is generally more expensive than other roofing types, and its production is harmful to the environment. If it’s installed incorrectly, the seams can leak, so you want to make sure you work with reputable commercial roofing contractors.
Although PVC can withstand cold temperatures, it may not be ideal for regions with frequent freeze-thaw cycles. As it gets older, it can shatter in colder climates.
6. TPO Roofing
Thermoplastic polyolefin (TPO) roofing systems are among the most popular choices for commercial and residential low-slope roofs due to their affordability and performance. These single-ply membranes are made from a blend of polypropylene and ethylene-propylene rubber, offering an ideal balance of strength and flexibility.
TPO roofing is known for its excellent energy efficiency, reflecting UV rays to reduce cooling costs in warmer climates. It is resistant to weathering, punctures, and chemical exposure, making it a durable and low-maintenance option. The heat-welded seams create a strong, watertight bond, ensuring long-term performance and reliability.
Beware of cheap, poorly made products. Since TPO has become so popular, many small manufacturers have tried to create their own product lines, allowing quality to slip through the cracks. Be sure to purchase this type of product from a reputable manufacturer as cheaper materials degrade faster.
What’s the Right Roof?
The different types of commercial roof materials have their own benefits and drawbacks, which can feel overwhelming when you’re planning a new roof installation. Balancing your budget against the material’s durability, lifespan, and future energy savings can feel challenging.
BUR and TPO are both affordable options, but their lifespans are shorter, so you may end up having to invest in a new roof sooner. Metal roofs are long-lasting, but you’re going to need to make sure they’re treated against corrosion if you live in a humid or coastal environment. Both metal and PVC can lower your energy costs, but the upfront installation could be more than you’ve budgeted for.
Costs across roofing contractors can vary wildly. Some roofing companies participate in cooperative purchasing agreements, which can give you access to premium materials for a lower cost. If you’re torn between a cheaper option and a more durable material, the next step in your research is to reach out to a reputable roofing company and discuss quotes.
