Built Up Roof System (Materials, Installation & More)

When it comes to protecting commercial properties, choosing the right roofing system is critical. A built up roof (BUR) system has been a reliable and time-tested choice for decades, offering durability and protection for flat or low-sloped buildings.

If you’re a business owner looking to learn more about BURs and whether they’re the right fit for your property, this guide will walk you through everything you need to know:

• What is a built up roof (BUR)?
• Benefits of a built up roof
• How to install a built up roof (step-by-step guide)

💡 What is a Built Up Roof (BUR)?

A built-up roof, often called a “tar and gravel” roof, is a popular choice for flat or low-sloped roofing systems. This type of roof is constructed by layering multiple plies of bitumen and reinforcing fabrics to create a sturdy and waterproof surface. These layers are alternated and “built up” to form a protective barrier that can withstand various weather conditions, making it a reliable option for many roofing needs.

Built-up roofing systems, commonly referred to as BUR, are particularly well-suited for commercial buildings. They are often chosen for structures that require cost-effective and long-lasting solutions, especially for large, flat roof areas. Their durability and performance make them a practical choice for businesses looking to protect their investments while minimizing maintenance concerns.

One of the standout features of a built-up roof is its multi-layered protection. With multiple layers of materials, it provides excellent waterproofing to prevent leaks and water damage. Additionally, built-up roofs are resistant to UV rays and extreme heat, ensuring they hold up well in harsh weather conditions. With proper care and maintenance, a BUR system can last anywhere from 15 to 30 years, offering a dependable roofing solution for decades.

Core Materials in a BUR System:

• Bitumen (Asphalt or Coal Tar): Acts as a waterproof adhesive, available in hot- or cold-applied forms.
• Reinforcing Fabrics or Plies: Made of fiberglass or organic mats, providing strength and flexibility.
• Surfacing Materials: Includes gravel, mineral granules, or coatings, offering UV protection and added stability.

⭐️ 4 Benefits of a Built Up Roof

Many commercial property owners choose a built up roof system because of its significant benefits:

1. Durability

Built-Up Roofing (BUR) systems are known for their long lifespan, often lasting up to 30 years when properly installed and maintained. This durability stems from their unique multi-layered design, which provides exceptional resistance to the wear and tear that flat roofs commonly face. Leaks, punctures, and general weather-related damage are less likely to occur with a BUR roof, making it a reliable choice for long-term protection. For property owners looking for roofing solutions that can stand up to decades of exposure to the elements, BUR is an excellent investment.

2. Waterproofing

One of the standout features of BUR systems is their superior waterproofing capabilities. The multiple layers of bitumen and reinforcing fabrics create a robust barrier that effectively seals out water, even during heavy rainfall or storms. By preventing water penetration, BUR roofs protect buildings from costly water damage, such as structural rot, mold growth, or damage to interior finishes. This makes BUR systems particularly appealing for properties in regions that experience frequent rain or extreme weather.

3. UV Resistance and Thermal Performance

BUR systems are designed with energy efficiency in mind. The surface layer, often made of gravel or a reflective coating, helps deflect harmful UV rays that would otherwise heat up the building. This UV resistance not only prevents premature aging of the roof but also contributes to temperature regulation within the building. By reducing heat absorption, BUR roofs help maintain a cooler interior environment, cutting down on the need for air conditioning and lowering energy bills. This makes them an ideal choice for properties in hotter climates where energy efficiency is a top priority.

4. Low-Maintenance

Once installed, Built-Up Roofing systems require minimal ongoing maintenance compared to many other roofing options. Their sturdy, multi-layered construction means fewer repairs are needed over time, translating to less hassle and lower costs for property owners. Routine inspections and basic upkeep, such as cleaning debris off the surface, are usually all that’s required to keep the roof in good condition. This low-maintenance nature makes BUR systems a practical and cost-effective choice, especially for busy property owners who need reliable performance without constant attention.

🛠️ How to Install a Built Up Roof

Proper installation is crucial for a BUR system to perform effectively. While this is a task best left to experienced contractors like Distinctive Roofing, here’s an overview of how BUR installation typically works:

1. Prepare the Roof Surface

The first step in installing a Built-Up Roofing (BUR) system is to thoroughly prepare the roof surface. Begin by cleaning the roof to remove any debris, dirt, or loose materials that could interfere with the installation process. Next, inspect the surface for any signs of damage, such as cracks or holes, and make the necessary repairs. It is crucial to ensure the roof surface is completely dry and smooth before proceeding, as this will allow the materials to adhere properly and improve the overall durability of the roofing system.

2. Apply the Vapor Retarder

Once the roof surface is prepared, the next step is to install a vapor retarder. This layer is essential in preventing moisture from accumulating between the layers of roofing material, which could compromise the integrity of the system over time. A properly installed vapor retarder ensures that the BUR system remains effective in maintaining a strong, moisture-resistant barrier, especially in areas prone to high humidity or temperature fluctuations.

3. Install the Base Layer

After the vapor retarder is in place, it’s time to install the base layer of the BUR system. Begin by placing the first layer of bitumen, which acts as a binding agent, followed by a layer of reinforcing fabric. Together, these materials create a strong foundation for the multiple layers that will follow. The base layer is essential for providing stability and ensuring the longevity of the roofing system.

4. Build Additional Layers

With the base layer complete, additional layers of the BUR system can be added. Alternate between applying hot or cold-applied bitumen and layers of reinforcing fabric. Typically, three to five layers are built depending on the desired level of durability and protection. Each layer strengthens the roof and enhances its ability to withstand harsh weather conditions, ensuring a resilient and long-lasting structure.

5. Add the Surfacing Material

Once the necessary layers are in place, you can add the surfacing material. This top layer serves as a protective shield for the roof, safeguarding it from UV rays, harsh weather elements, and general wear and tear. Common surfacing materials include gravel, mineral granules, or reflective coatings. Not only does this layer provide additional durability, but it also improves the roof’s appearance and energy efficiency.

6. Inspect and Seal

The final step in the BUR system installation process is to conduct a thorough inspection. Carefully check the entire roof for any gaps, weak spots, or areas that may require additional attention. Once the inspection is complete, seal the edges and other vulnerable areas to ensure a watertight finish. Proper sealing prevents water infiltration, which is critical in maintaining the integrity and effectiveness of the roofing system over time.

🏡 Built Up Roofs

When it comes to built up roofs, Distinctive Roofing is the team you can count on for expertise, quality, and reliability. With over 25 years of experience, a commitment to using top-tier materials, and a customer-first approach, we ensure your roofing project is done right the first time. Whether you’re looking to install, repair, or maintain your commercial roof, our skilled team is here to provide solutions that last.

Ready to get started? Contact Distinctive Roofing today for a free consultation and see why businesses across Florida trust us with their roofing needs!