Repairing a flat roof can be a bit tricky, but that doesn’t mean it’s impossible - especially when dealing with Modified Bitumen (Modbit) and TPO roofing. These materials require a bit more care, but when handled by experts, they offer reliable, long-lasting solutions.
Flat roofs, like those with Modbit and TPO, present unique challenges, particularly when it comes to water drainage and leak detection. That’s why it’s crucial to have a contractor who knows these systems inside and out. At RoofCrafters, we’ve spent nearly 30 years perfecting our approach to Modbit and TPO roof repairs. Our goal is to empower property owners with the knowledge they need to make informed decisions about their roofing options.
Whether you already have a Modbit or TPO roof or are just exploring your choices, this guide will walk you through everything you need to know. We’ll dive into the pros and cons of each material, helping you weigh your options and choose the best fit for your roof.
Understanding Modified Bitumen Roofing
Modified Bitumen, or Modbit, is a popular choice for commercial buildings. It’s been around for about 50 years and is known for its durability. Made from layers of bitumen, fiberglass, and rubber, Modbit creates a tough, weather-resistant roofing system that’s relatively easy to install.
Installation Process
Modbit typically comes in 3-foot-wide rolls, which makes it easy for contractors to unroll and install on the roof. The most common method is torch-down roofing, where the roll’s underside is heated to stick securely to the roof. Other methods include self-adhered, hot mop, and cold process applications, but torch-down remains the most popular.
Waterproofing
Ensuring a watertight seal is crucial with Modbit roofs. The rolls must be tightly bonded, and once laid, a final protective layer is added. This layer, which can be either rough or smooth, shields the roof from sun damage.
Advantages and Disadvantages of Modified Bitumen Roofing
Advantages
- Eco-friendly: Modbit can often be recycled at the end of its lifespan, which helps reduce environmental impact.
- Durability: It’s highly resistant to weather extremes, making it a long-lasting option.
- Versatility: Suitable for various building types and roof designs, Modbit is a practical choice for many commercial properties.
- Ease of installation and repair: Modbit is straightforward to install and relatively easy to repair, which can save time and money on maintenance.
Disadvantages
- Heat sensitivity: Installation requires heating, which can be risky if not done correctly.
- Aging: Over time, Modbit can become less flexible, leading to potential cracking.
- Weather-dependent installation: Installation can be tricky in wet or cold conditions.
- Aesthetic limitations: Modbit may not offer as many design options as other roofing materials.
- Puncture risk: While durable, Modbit is susceptible to punctures from sharp objects, requiring careful inspection.
What is TPO Roofing and Why is it Popular?
TPO, or Thermoplastic Polyolefin, is another popular flat roofing material, especially for commercial properties like grocery stores, big box stores, and more recently, residential homes. Its popularity has surged due to its ease of installation and cost-effectiveness.
Why Choose TPO?
- Energy efficiency: TPO is typically white, which reflects sunlight and helps keep buildings cooler, making it a great option for hot climates.
- Low maintenance: Being a single-ply roof, TPO is easy to maintain and repair.
- Flexibility and durability: TPO roofs are flexible and durable, handling various weather conditions well.
Advantages and Disadvantages of TPO Roofing
Advantages
- Energy efficiency: Reflects sunlight, reducing cooling costs.
- Flexibility: Adapts well to different weather conditions.
- Low maintenance: Simple to maintain and repair.
- Less labor intensive: Easier and faster to install compared to other roofing systems.
Disadvantages
- Limited color options: Mostly available in white, which may not suit all design preferences.
- Chemical sensitivity: Some chemicals can damage TPO, so it’s important to avoid exposure.
- Potential for shrinkage: Over time, TPO can shrink if not properly maintained.
- Relatively new: As a newer material, it doesn’t have the long track record that Modbit does, though it’s gaining trust rapidly.
Comparing Modified Bitumen and TPO Roofing: Which Suits You Best?
Now that we’ve discussed what these two roofing systems are all about, let’s get into the comparison. Both of these roof systems are a great choice for any commercial or residential property with a flat roof. So, you may be asking. "Which one is the best for me?"
Key Considerations for Modified Bitumen Roofing
- An excellent choice for moisture protection, however, most require additional drainage systems to work effectively.
- The positive results and efficiency of a new Modbit roof are undeniable, but the materials cost more and are more labor-intensive to install.
- Modbit has been around for over 50 years and is an incredibly trustworthy option, although some believe this option is becoming outdated while new technologies continue to develop.
- While Modified Bitumen is environmentally friendly in the sense that it can be recycled once it's no longer in use if petroleum and other chemicals are used during the manufacturing process, the “green” aspect of depleted.
- In most cases, it comes with less warranty. The average warranty is 10-12 years for Modbit.
Key Considerations for TPO Roofing
- While TPO is less expensive than Modbit upfront and costs less to install as well, it does not have the same long-lasting durability. Meaning it's not as tough as Modbit. It can puncture easier than a Modbit roof.
- Unlike Modified Bitumen, TPO roofing systems can handle heavy amounts of water remaining on the roof, which can help tremendously if the roof has less slope.
- TPO is relatively new on the market, but don’t let that scare you. In recent years, it has come to be one of the most in-demand products in the roofing industry.
- Efficient and effective in their construction, TPO is one of the most functional commercial roofing options available.
- TPO has longer-lasting warranties available. The average material warranties are 15-20 years with some TPO manufacturers offering a 30-year material warranty.
Making the Right Roofing Choice
Choosing between Modbit and TPO doesn’t have to be difficult. It’s all about finding the best fit for your specific needs. Consider your building’s design, size, location, and your personal preferences.
To make an informed decision, consult with a professional roofing contractor who can assess your roof and provide expert guidance. If you’re ready to take the next step, RoofCrafters is here to help. We specialize in both Modified Bitumen and TPO roofing, offering top-notch service and warranties.
Schedule an inspection with our experienced estimators today, and check out our learning center for more resources to help you make the best decision for your property.
