How Long Does a Flat Roof Last
A flat roof that is properly maintained can last for decades depending on the materials used. Built-up roofs or layers of modified bitumen may last up to 20 years. The same lifespan is possible for light-weight thermoplastic polyolefin or spray-on coatings made of acrylic, polyurethane foam or silicon. The most durable roofing materials, such as polyvinyl chloride roofing (PVC) and ethylene propylene monomer (EPDM), can last for up to 10 years or more depending on how they are maintained and inspected. To stay ahead of commercial roof replacement and repair, learn more about the factors that affect how long a flat roof lasts.
Factor in Material
A flat roof’s material determines its lifespan. A multi-layer roof made up of waterproof material, hot-tar and gravel may last between 15 to 20 years. However, modified bitumen roofs with three to five layers have a shorter average life expectancy of between 10 and 15 years. These materials can be heavy and not the best for every building.
Lightweight single-ply roofing is more durable than layered roofs. It depends on the materials used, the design of your roof, and how much you rely on commercial roof repairs. EPDM and TPO roofing typically last between 10 and 20 years. TPO roofs, on the other hand, have stronger seams than EPDM roofing. Aside from that, a PVC roof can last for up to 30 years if maintained properly.
Consider the Weather
Exposure to extreme temperatures, wind gusts, and heavy rainfall can cause your flat roofing to be damaged more than a similar roof in another climate. Asphalt flat roofing is more susceptible to expansion and contraction as temperatures change. Tar to blister can also occur at high temperatures, which can lead to premature wear.
Single-ply materials may have different properties than those made from multiple layers. EPDM is typically available in black. This can help to retain heat and melt snow in cold conditions, but trap heat in warmer weather. For a slightly higher price, we can coat this material with a lighter color. TPO is available in light gray or white to improve energy efficiency. We can also apply spray-on and PVC coatings in any shade and provide roofing solutions that are durable for all climates.
Protect Your Structure
Commercial roof repairs may involve patching minor leaks. Roofs that have suffered more severe damage from impact or wear may be at greater risk for major water damage, or even collapse. Because of that, a roof replacement might be more cost-effective than additional repairs if an older roof has damage or has multiple patches.
A flat roof that has one inch of standing water over a 20 x 20 foot area will add 2,000 pounds. Excess weight can cause damage to any new roof regardless of the material.
Resolves Underlying Problems
One of the many possible underlying problems is a roof that doesn’t drain properly. Commercial roofs that are not draining properly may need to be replaced sooner than the lifespan of the material. Foundation problems can cause a structure to shift or settle more than if it is solid. A roofing membrane can buckle, making a building unsound. All Star Roofing can advise on the best materials and design options for commercial buildings.
The material choice, the structural requirements and the location of a commercial property can all impact how long a roof will last. To ensure that your roof lasts the longest, it is important to keep it in good condition. It is easy to block drainage systems and water pooling can cause roof damage.
Contact At All Star Roof Repair
You can choose from a range of services that will suit your needs.
- Roof Installation
- Shingle Roofs
- Tile Roofing
- Flat Roofing
- Metal Roofing
- Emergency Roof Repair
- Hurricane Help
Professionals like All Star Roofing are trained to quickly repair or patch any damage, such as cracks, blisters, punctures, or splits. Commercial roof repairs and regular inspections are key to maintaining a flat roof for many years. Contact us today, and we will send over a roofing expert to help you get your roofing done!