When searching for the right roofing solution for a flat roof, built-up felt roofing (BUR) stands out as a practical choice. It has been around for many years and offers unique benefits. However, like any roofing option, it comes with its own set of advantages and disadvantages.
In this blog post, we'll break down the benefits and drawbacks of built-up felt roofing, helping you figure out if it is the right option for your flat roof.
What is Built-Up Felt Roofing?
Built-up felt roofing is a layered roofing system made up of alternating layers of bitumen (asphalt) and reinforcing felts. These materials are rolled out and bonded together using heat or adhesive, resulting in a sturdy, waterproof surface.
A key highlight of built-up felt roofing is its flexibility. It can easily adapt to a variety of substrates, making it suitable for different structures. Additionally, the roofing can be topped with diverse cap sheets, enhancing its durability and appearance.
Advantages of Built-Up Felt Roofing
Durability
One of the most notable benefits of built-up felt roofing is its outstanding durability. The multiple layers create a thick surface that can endure severe weather, including heavy storms and high UV exposure. With proper installation and care, BUR can have a lifespan of 20 to 30 years, giving a solid return on investment.
Waterproofing
The remarkable waterproofing capabilities of built-up felt roofing are a major draw. Its layered structure allows for effective resistance against moisture, decreasing the risk of leaks. For example, studies show that BUR systems have a leak rate of less than 1%, making them a reliable choice for flat roofs.
Cost-Effective
When compared to other roofing materials, built-up felt roofing can be budget-friendly. The materials are often lower in cost, and the installation process is simple, especially when the roof is flat and accessible. Homeowners often see initial costs ranging from $3 to $6 per square foot, making it an economical option.
Versatile Options
Another significant asset of BUR is its versatility. It can be topped with various materials such as gravel, asphalt, or metal, which can enhance both energy efficiency and visual appeal. For instance, a gravel top can reflect sunlight, potentially reducing cooling costs by up to 15% in warmer climates.
Low Maintenance
Maintenance for built-up felt roofing is generally minimal compared to other types. Simple actions like routine inspections and minor repairs can prolong its lifespan without substantial costs. Regular checks, ideally twice a year, can catch small issues before they become larger, saving money in the long run.
Disadvantages of Built-Up Felt Roofing
Installation Process
While installation can be relatively straightforward, it is vital that it is executed by experts who understand BUR systems. Incorrect installation can lead to problems like seam failures. According to the National Roofing Contractors Association, 39% of roofing failures can be attributed to installation errors, underscoring the importance of hiring the right professionals.
Weight
The multi-layered structure of built-up felt roofing does make it heavier than some alternatives. It's crucial to ensure that your building can bear this weight, particularly if it is an older structure. A structural engineer can help assess weight limits and safety.
Susceptibility to Ponding Water
Although built-up felt roofing is designed to resist water, poor drainage can lead to water pooling. This can speed up wear and increase the chance of leaks. Regular maintenance is critical to ensure drains are clear and functioning effectively. Studies suggest that roofs with proper drainage can last up to 20% longer.
Aesthetic Limitations
Some homeowners may find built-up felt roofing less visually appealing than alternatives such as metal or shingle roofing. While there are decorative finishes available, they may not offer the same extensive design options as other roofing types.
Cost Consideration
Evaluating the costs associated with built-up felt roofing is essential when deciding if it's the right choice for your flat roof. While the initial investment is often lower than that of other materials, it is important to consider long-term expenses, including maintenance and repairs.
Longevity vs. Upfront Cost
The attractive initial price of built-up felt roofing can lead to better value over time because of its lifespan. The key is to weigh the upfront savings against potential future costs—more affordable options may need replacement every 10 to 15 years, while BUR can last significantly longer.
Comparing with Alternatives
Comparing built-up felt roofing with other options, like EPDM (ethylene propylene diene monomer) rubber roofing or TPO (thermoplastic olefin) roofing, is worthwhile. Each option offers distinct advantages. For instance, EPDM is typically lighter and can be easier to install, while TPO tends to reflect heat better.
Key Takeaways
Determining if built-up felt roofing is right for your flat roof depends on several factors. Consider your budget, the specific conditions of your roof, and your willingness to handle ongoing maintenance.
Engaging with professional roofers can provide valuable insights tailored to your needs. By weighing the pros and cons and considering how they match your unique requirements, you can make an informed decision. Remember that investing in a quality roof is essential for your property’s longevity.
In Conclusion
Built-up felt roofing remains a strong candidate for flat roofs, offering durability, waterproofing, and cost savings. However, challenges like installation quality and maintenance considerations are crucial to keep in mind.
Understanding the benefits and drawbacks will give you a clearer view of whether built-up felt roofing meets your needs and expectations. If you decide to go this route, ensure proper installation and regular upkeep to maximize your investment.
Take your time in evaluating your options and do not hesitate to seek expert guidance as you embark on your roofing decision-making process.
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