What Is a Built Up Roof? Understanding This Big Approved Technology
What is a built up roof? If you’ve been asking this question, then you’re in the right place. A built-up roof, often abbreviated as BUR, is a type of roofing system that has been around for over a century. Known for its durability and strength, it’s commonly seen in commercial and industrial buildings but is also a choice for residential properties. In this article, we will dive into the remarkable world of built-up roofs, exploring their components, benefits, and why they remain a popular choice today.
Understanding Built Up Roofs (BURs)
A built-up roof is a layered roofing system created by alternating layers of bitumen and reinforcing materials. This layered approach provides a comprehensive shield against weather and wear, making it a formidable option for flat or low-sloped roofs. With the advent of new materials and techniques, built-up roofs have only improved in efficacy and economy, offering tremendous value to homeowners and businesses alike.
Components of a Built-Up Roof
Bitumen
Bitumen, the primary component of BURs, is a sticky, black substance similar to tar. In built-up roofs, bitumen can be applied hot, as in hot-mopped asphalt, or cold through adhesives.
Reinforcing Fabrics
These layers reinforce the integrity of the roofing system. Materials such as fiberglass or polyester are used for their strength and flexibility.
Surfacing
The top layer of a built-up roof can be gravel, mineral granules, or a weather-resistant coating. This layer not only protects the layers beneath but also provides aesthetic and added resistance against the elements.
The Development of Built-Up Roofing Technology
The technology behind built-up roofs has seen tremendous advancements over the years. Modern roofing technology incorporates advanced polymers and eco-friendly materials to improve lifespan and environmental sustainability.
Historical Perspective
Originating in the mid-19th century, the BUR system quickly became a standard for flat roofing projects. Its durability made it the go-to choice for many early office buildings and public infrastructures.
Advantages of Built Up Roofs
A built-up roof offers tremendous benefits:
- Durability: With a lifespan of up to 30 years, these roofs are built to last.
- Resilience: They can withstand severe weather conditions, including high winds and heavy rain.
- Low Maintenance: Requiring minimal upkeep, they remain a cost-effective solution.
Installation Process
The installation of a built-up roof involves several key steps. Professionals typically follow this process:
- Surface Preparation: Cleaning the roof deck is crucial to ensure optimum adhesion of materials.
- Layering: Alternating layers of bitumen and reinforcing fabric are installed.
- Surfacing: A finishing layer, often gravel, is applied to protect and seal the roof.
Challenges and Considerations
While built-up roofs are remarkably effective, they do come with challenges:
- Installation Time: The layered process can take more time than other roofing options.
- Initial Costs: Upfront costs may be higher, but the longevity and low maintenance often justify the expense.
- Weight: These roofing systems can be heavier than alternatives, requiring sound structural support.
Environmental Impact
The latest advancements in roofing technology focus on reducing environmental impact, with newer materials being made from recycled content and technology ensuring a smaller carbon footprint over their lifecycle.
Cost of Built Up Roofs
The cost of a built-up roof can vary based on materials and complexity of installation. Generally, installation ranges from $5 to $9 per square foot. For more information on the cost considerations of roofing, you can visit average roof cost guide.
Comparing Built Up Roofs with Other Roof Types
BURs vs. single-ply roofs: Both have their merits, but BURs often excel in longevity and resistance to the elements.
Maintaining a Built Up Roof
Regular inspections and cleaning are recommended to keep your built-up roof in top condition. Simple maintenance tasks, like removing debris and ensuring proper drainage, can significantly prolong its life.
Is a Built Up Roof Right for You?
If you are considering a built-up roof for your home or commercial building, weigh the pros and cons based on your specific needs and budget. For a detailed discussion on choices for different buildings, consider visiting truss comparisons.
Conclusion
In summary, the built-up roof is a powerful, time-tested roofing system that offers durability and weather resistance, making it an approved solution for many building types. With the continued evolution of roofing materials and technology, these systems continue to adapt to modern demands while remaining a reliable option for those seeking both performance and value.
FAQs
What is a built-up roof made of?
It consists of layers of bitumen alternated with reinforcing materials such as fiberglass and topped with a protective layer like gravel.
How long does a built-up roof last?
A well-maintained built-up roof can last between 20 to 30 years.
Are built-up roofs suitable for flat roofs?
Yes, they are ideal and very popular for flat or low-sloped roofs due to their strength and waterproofing properties.