TPO Versus PVC Roofing: Which Is Better for Your Roof?
Summit Commercial Roofing
Author
Learn more about the differences between TPO and PVC roofing and how to decide which one to install on your roof.
Learn more about the differences between TPO and PVC roofing and how to decide which one to install on your roof.
The average commercial roof lasts between 15 and 30 years, but its lifespan varies based on how often it’s maintained, the environmental conditions it’s exposed to, the type of material it’s made from, and how it’s installed.
TPO and PVC are two of the most common material options used on low-slope commercial roofs. If you need to replace your existing system, it can be challenging to understand which option is right. Neither option is inherently bad; it just depends on where you’re located and what your roof will be exposed to.
TPO (thermoplastic polyolefin) is a newer material on the market that blends rubber, polypropylene, and propylene into a three-layer, single-ply material that covers the entire roof.
PVC (polyvinyl chloride) is a strong but flexible thermoplastic roofing material featuring heat-welded seams.
TPO and PVC both offer similar advantages; the only inherent risk with TPO is that it’s a newer material on the market. The factor that most determines longevity is how the roofing material is attached. PVC roofing can be adhered or mechanically attached (with fasteners), while TPO roofing can be adhered, mechanically attached, or induction-welded. This table compares all three materials based on the installation method.
| Factor | PVC & TPO (Adhered) | Mechanically Attached PVC & TPO | Induction-Welded TPO |
|---|---|---|---|
| Environmental Conditions/Climate | Ideal for moderate to warm climates—less effective in extremely cold temperatures where adhesive can become brittle | Excellent for areas prone to high winds, but may be more prone to leaks in very wet climates | Good for variable climates, including those with temperature fluctuations |
| Roof Type | Ideal for complex roof geometries or roofs with a lot of equipment or penetrations | Ideal for large, open roofs | Ideal for both complex and simple roof layouts |
| Level of Ease/Complexity | Technically demanding—weather conditions must also be right | Simpler and quicker but still labor-intensive | The hardest of all three methods as it requires specialized equipment and some technical knowledge but overall less labor-intensive |
| Overall Expense | Varies based on the price of adhesive. Not as costly as induction welded but costlier than mechanically attached | Least expensive but may lead to higher maintenance costs due to leaks | Most expensive, but may lead to lower long-term maintenance costs |
| Installation Time | Lengthy and delays due to weather conditions are possible | Faster than adhesive methods | Faster than adhesive methods, but longer setup and preparation time required |
| Potential Risk of Roof Damage | Low risk | High risk | Low risk |
TPO and PVC roofs can last several decades before replacement is necessary. However, PVC roofs tend to have a slightly longer lifespan of 20 to 30 years compared to TPO’s 15 to 25 years, although more information is still needed to confirm the accuracy of TPO’s lifespan.
Induction-welded TPO may last longer, simply because the seams are stronger and because the installation method is less likely to damage the roof comparing to using fasteners and other mechanical attachments.
TPO and PVC both provide exceptional weather resistance. TPO’s flexibility in cold temperatures is ideal when winter weather strikes, while PVC’s strength and durability help it stand up to the snow, ice, and frigid temperatures that Michigan experiences each winter. If adhered, both options may become damaged over time because adhesives can become brittle in cold temperatures. Likewise, mechanically attached PVC and TPO roofing systems can withstand cold temperatures, but may be prone to leaks in areas that experience significant rainfall.
The option that provides the most protection is induction-welded TPO. While TPO and PVC have similar weather resistance, it’s not possible for PVC to be induction welded. Instead, seam joining is done with hot air or solvent welding.
Bottom line: Both roofing options are ideal for climates that experience cool temperatures and winter weather, though induction-welded TPO tends to be the more favorable option for all climates.
TPO is the more affordable option, with such roofs typically priced between $4 and $10 per square foot (including materials and installation). PVC roofs are more expensive, typically priced between $5 and $15 per square foot for materials and insulation. Of course, the method by which the roof is installed also impacts costs; induction welding (with TPO) is the most expensive option, but it may result in a higher ROI due to lowered maintenance costs. Additionally, mechanically attached PVC and TPO roofs may cost less to install than adhered systems, but at the cost of potential leaks.
Induction welding is the most complex (and expensive) method of installing TPO because it requires specialized equipment and skills. Adhered TPO and PVC are less complex, but may take more time to complete, especially because installations can’t occur during inclement weather. Mechanically attached systems are the fastest, least complex, and least expensive installation method, but comes with a high risk of roof damage and potential maintenance costs.
Beyond the installation methods, maintenance is fairly straightforward for both types of roofs, and it’s also essential to roof longevity. TPO roofs require regular cleaning and inspections for damage. Seam resealing may also be necessary on occasion, depending on how the roof was installed. PVC roofs also require routine cleaning and inspection. However, PVC roof repair is typically required less frequently than TPO and other types of roofing due to its enhanced durability, which can help make it a more attractive long-term option.
Founded over 50 years ago, Summit Commercial Roofing specializes in providing commercial roofing services throughout southeast Michigan. We can install, replace, and repair both TPO and PVC roofing. If you need help deciding which material is best for your roof, please contact us today to schedule a free assessment. You can also visit our blog for more resources.
Is your property in need of roofing service? Contact Summit Commercial Roofing today at 734-422-8280 or fill out our online form for more information and to schedule a free, no-hassle roof inspection and service estimate. As Southeast Michigan's leader in commercial roofing services, we're standing by to deliver fast, reliable and high-quality roofing service.