When it comes to choosing the right roofing system for your commercial building, durability is a top priority. One option that stands out in this regard is the built-up roof (BUR) system. In this comprehensive guide, we’ll explore the pros and cons of the built-up roof system, also known as the BUR system. Whether you’re a roofing professional or a building owner, this article will provide you with valuable insights into this time-tested roofing solution.
The Pros and Cons of Built-Up Roofing System
Before delving into the specifics of a BUR system, let’s start by understanding what it is and why it’s worth considering. A built-up roof, as the name suggests, is constructed by building up multiple layers of roofing material, such as bitumen and ply sheets. This results in a robust and durable roofing system that is especially suitable for commercial buildings with flat or low-slope roofs.
Understanding the Built-Up Roof System
Before delving into the pros and cons of built-up roofing systems, it’s essential to figure out what a built-up roof is.
What Is a Built-Up Roof?
A built-up roof, often abbreviated as BUR, is a type of roofing system that consists of multiple layers of bitumen and ply sheets. These layers are built up to create a strong and waterproof roofing membrane. The top layer is typically surfaced with gravel or other materials for added protection.
Types of Built-Up Roofing
There are different types of built-up roofing, and the choice of materials can vary based on factors such as climate, budget, and building requirements. Common types include:
-
Hot Asphalt Built-Up Roof: This traditional approach uses hot asphalt to adhere layers of roofing felt and bitumen together. It’s known for its durability and fire resistance.
-
Modified Bitumen Built-Up Roof: This system incorporates modified bitumen sheets for added flexibility and performance. It’s a popular choice for BUR roofs.
-
Tar and Gravel Roof: Also known as a “tar and gravel” roof, this type of BUR system uses multiple layers of bitumen and is surfaced with a layer of gravel, providing additional protection.
Pros of a Built-Up Roof
-
Durability: Built-up roofs are known for their longevity. With proper maintenance, these roofs can last 20 to 30 years, or even longer in some cases.
-
Waterproof: The multiple layers of bitumen and ply sheets provide excellent waterproofing, making BUR systems ideal for areas with heavy rainfall or snow.
-
Energy Efficiency: BUR systems offer good insulation, helping to reduce energy consumption and maintain comfortable indoor temperatures.
-
Ballasted Roof System: Some built-up roofs use a ballasted system with stone or gravel on top, which adds to their durability and helps with temperature regulation.
-
Fire Resistance: The layers of bitumen in a BUR system provide a high level of fire resistance, making it a safe choice for commercial buildings.
Cons of a Built-Up Roof
-
Installation Process: Installing a built-up roof can be a complex and time-consuming process, requiring professional roofing contractors with experience in BUR systems.
-
Maintenance: While BUR systems are durable, they still require regular maintenance to ensure they last as long as possible.
-
Weight: The multiple layers of roofing material can add significant weight to the roof deck, which may require structural reinforcement.
-
Cost: The initial cost of installing a built-up roof can be higher compared to some other roofing options, although the long-term durability can offset this expense.
Now that we’ve covered the pros and cons of a built-up roof, let’s dive deeper into the specifics of this roofing system.
How Is a Built-Up Roof Installed?
The installation process of a built-up roof involves several steps:
-
Roof Deck Preparation: The roof deck is prepared by ensuring it is clean, smooth, and in good condition.
-
Application of Insulation: Insulation may be applied to the roof deck to enhance energy efficiency and provide thermal protection.
-
Layering Bitumen and Ply Sheets: Multiple layers of bitumen and ply sheets are alternated and adhered to create a strong, waterproof membrane.
-
Surfacing: The top layer is surfaced with materials like gravel or reflective coatings, depending on the specific BUR system.
Protect Your Built-Up Roof
To ensure the longevity and performance of your built-up roof, it’s essential to take certain precautions and maintenance steps:
-
Regular inspections to detect and address any leaks or damage promptly.
-
Cleaning the roof surface to remove debris and prevent damage to the roofing material.
-
Coating or re-surfacing the roof as needed to maintain its waterproofing properties.
-
Hiring a professional roofing contractor with experience in BUR systems for any repairs or modifications.
The Best Built-Up Roof for Your Needs
Selecting the right type of built-up roof for your commercial building is crucial to ensure it meets your specific requirements. Factors to consider include the climate in your region, budget constraints, and the intended use of the building. Consulting with a professional roofing contractor can help you make an informed decision.
Conclusion: Built-Up Roofs Last the Test of Time
In the world of commercial roofing, the built-up roof system has proven its worth over the years. Its durability, waterproofing capabilities, and fire resistance make it a top choice for many building owners. However, it’s essential to weigh the pros and cons carefully and select the right type of BUR system for your needs.
In summary, here are the key takeaways:
-
Built-up roofs are durable and long-lasting, with a lifespan of 20 to 30 years or more.
-
They provide excellent waterproofing and insulation, making them energy-efficient.
-
Installation should be carried out by professional roofing contractors.
-
Regular maintenance is crucial to extend the life of your built-up roof.
-
Choose the right type of BUR system based on your specific requirements and budget.
As you consider your roofing options, remember that a well-maintained built-up roof will last the test of time, providing reliable protection for your commercial building. Whether you’re a roofing professional or a building owner, the investment in a built-up roof can be a wise one for the long-term security and durability it offers.
