How Long Do Commercial Roofs Last?

July 11th, 2024

Last updated: July 11th, 2024

How often do you think about your roof? The chances are, it doesn’t cross your mind until there is a problem such as a leak. However, you should occasionally think about your roofing and how long commercial roofs last to ensure that you have properly planned ahead and you know when it might be approaching the time to replace.

Like all parts of a building, roofs have a limited lifespan. Understanding how long a commercial roof lasts and the factors that influence its longevity can help businesses plan for maintenance and replacements effectively. Let’s dive into the different types of commercial roofing and their predicted lifespans. Of course, this can vary depending on many factors, and we’ll also look at some of the things that can impact roofing such as repairs and potential problems and repairs.

Built-Up Roofing (BUR)

Built-up roofing (BUR) is one of the oldest types of commercial roofing. It consists of multiple layers of bitumen and reinforcing fabrics, topped with gravel or other types of protective coatings. This multi-layer construction makes BUR quite durable. Generally, a BUR roof can last anywhere from 15 to 30 years, depending on the quality of materials used and the level of maintenance it receives.

Modified Bitumen Roofing

Modified bitumen roofing is an evolution of BUR and incorporates polymer-modified bitumen reinforced with one or more layers of fabric. This type of roofing offers greater flexibility and resistance to extreme weather conditions. Typically, modified bitumen roofs have a lifespan of 20 to 25 years. Regular inspections and maintenance can extend their life by addressing small issues before they become major problems.

EPDM Roofing

EPDM (ethylene propylene diene terpolymer) is a synthetic rubber roofing membrane that is widely used for its durability and ease of installation. Known for its ability to withstand extreme temperatures, EPDM roofs are popular in both hot and cold climates. On average, an EPDM roof lasts about 20 to 25 years. However, with proper maintenance, it’s not uncommon for these roofs to exceed their expected lifespan, reaching up to 30 years or more.

PVC Roofing

PVC (polyvinyl chloride) roofing is another single-ply roofing membrane that offers excellent durability and energy efficiency. PVC roofs are resistant to chemical damage, making them ideal for buildings like restaurants that may have exposure to grease and other chemicals. A well-maintained PVC roof can last between 20 to 30 years. The longevity of PVC roofs can be maximised with regular inspections and maintenance to repair any minor damages early on.

TPO Roofing

Thermoplastic Olefin (TPO) roofing is a single-ply roofing membrane known for its energy efficiency and durability. TPO roofs reflect UV rays, which helps in reducing cooling costs for the building. The typical lifespan of a TPO roof ranges from 15 to 20 years. Advances in manufacturing and materials are gradually improving the longevity of TPO roofs, making them a popular choice for modern commercial buildings.

Metal Roofing

Metal roofing is renowned for its durability and long lifespan. Common materials for metal roofing include steel, aluminium, and copper. These roofs can withstand harsh weather conditions, including heavy snow, strong winds, and intense sunlight. On average, properly looked after, metal roofs can last between 40 to 70 years, making them one of the longest-lasting roofing options available. Although the initial cost is higher than other types, the extended lifespan and low maintenance needs often make metal roofing a cost-effective choice over the long term.

Factors Influencing Roof Lifespan

The lifespan of a commercial roof is influenced by several factors beyond the type of material used. These include:

• Installation Quality. Proper installation is critical to the longevity of any roof. Poor installation can lead to issues such as leaks and structural damage, significantly reducing the roof’s lifespan.
• Climate. Weather conditions play a significant role in roof durability. Extreme temperatures, heavy rainfall, and strong winds can all affect the longevity of a roof. Certain roofing materials are better suited to specific climates.
• Other Damage. Roofs can sometimes be damaged by other things besides the climate, including if there are pests, such as rodents, who can chew through different materials including roofing materials.
• Maintenance. Regular maintenance is essential to keep a roof in good condition. This includes periodic inspections, cleaning, and prompt repairs of any damage. A well-maintained roof will generally last longer than one that is neglected.
• Usage and Traffic. Roofs that experience high foot traffic (if people can get on top) or have heavy things stored upon them, may wear out faster. Protective measures, such as walkways and pads, can help extend the roof’s life in these cases.

If you need to fix a damaged roof, then it’s important to get in touch with a professional as soon as possible.

At Robinsons Facilities Services, our local team is experienced in working with all types of roofs on commercial buildings, including flat roofs and pitched roofs.