Introduction of Built-Up Roofing

Introduction of Built-Up Roofing

Introduction of Built-Up Roofing

Built-up roofing (BUR) is a time-tested and widely used method of waterproofing flat or low-sloped roofs. Over the years, BUR has undergone significant advancements in materials and techniques, making it a highly durable and cost-effective solution for commercial and industrial buildings. The construction industry has embraced BUR for its ability to provide a seamless and long-lasting barrier against water penetration, as well as its resistance to harsh weather conditions. In this article, we will explore the history, benefits, and installation process of built-up roofing, highlighting its importance in modern roofing systems for commercial buildings.

What is Built-Up Roofing (BUR)

What is Built-Up Roofing (BUR)

Built-Up Roofing (BUR) is a type of roofing system commonly used in commercial and industrial buildings. It is also known as “tar and gravel” roofing, and has been in use for over 100 years. BUR is made up of multiple layers of roofing felt, mopped together with hot asphalt, and topped with a layer of gravel or mineral cap sheet.

The first layer of BUR is a base sheet, which is usually made of organic or fiberglass felt. This layer is attached to the roof deck using hot asphalt or cold-applied adhesive. The base sheet provides a strong foundation for the rest of the BUR system.

The second layer is called the interply, which is also made of felt and is mopped onto the base sheet with hot asphalt. This layer provides additional strength to the roof system and helps to prevent water from penetrating the roof.

The final layer of BUR is the top coat or cap sheet. This layer is made of gravel or mineral surfacing and is designed to protect the underlying layers from UV radiation, weather, and foot traffic. The top coat also helps to improve the fire performance of the roof.

One of the key benefits of BUR is its long lifespan. With proper installation and maintenance, a BUR roof can last up to 30-40 years. This makes it a cost-effective option for building owners who are looking for a durable and long-lasting roofing system.

Another advantage of BUR is its ability to resist water and weather damage. The multiple layers and the use of hot asphalt for adhering the layers make BUR highly water-resistant. The gravel or mineral cap sheet also helps to protect the roof from the damaging effects of the sun’s rays.

Additionally, BUR can be installed in a variety of roof configurations, making it a versatile option for different building structures. It can be applied to flat or sloped roofs, and can also accommodate rooftop equipment and other penetrations.

While BUR has many advantages, there are some limitations to consider. The installation process can be messy, as it involves hot asphalt and gravel. BUR is also heavy, so the building must have adequate structural support to accommodate this type of roofing system. The installation process also requires skilled workers and proper safety measures to be in place.

In conclusion, Built-Up Roofing is a popular and proven roofing solution for commercial and industrial buildings. Its multi-layered design, water resistance, and long lifespan make it a reliable choice for many building owners. However, it is important to consult with a professional roofing contractor to determine if BUR is the right option for your specific building and budget.

Modified Bituminous Roofing

Modified Bituminous Roofing

Modified bituminous roofing is a type of roofing system that consists of traditional asphalt-based material, modified with rubber or plastic additives. This results in a more durable and flexible roofing material that is suitable for a range of commercial and residential applications.

The primary component of modified bituminous roofing is asphalt, which is a sticky, black, and highly viscous liquid that is derived from petroleum. This material has been used in roofing for many years due to its waterproofing and adhesive properties. However, it has some limitations, such as being prone to cracking and brittle at low temperatures.

To overcome these limitations, rubber or plastic modifiers are added to the asphalt during the manufacturing process. These modifiers enhance the material’s properties, making it more flexible and resistant to temperature changes, UV radiation, and chemical exposure. As a result, modified bituminous roofing is more durable and can withstand harsh weather conditions, making it a preferred choice in areas with extreme climates.

The most common modifiers used in modified bituminous roofing are styrene-butadiene-styrene (SBS) and atactic polypropylene (APP). SBS modifiers, which are rubber-based, provide increased elasticity and are suitable for areas with high foot traffic, while APP modifiers, which are plastic-based, offer better resistance to UV radiation and chemical exposure.

Modified bituminous roofing typically comes in rolls, with a mineral or gravel surface layer. This surface layer serves as protection against UV radiation, while also providing a textured finish that prevents slipping and improves the roof’s aesthetic appeal.

The installation process of modified bituminous roofing is relatively straightforward. First, the existing roof surface is cleaned and prepared. The modified bitumen rolls are then placed over the roof, and the seams between the rolls are fused together using heat or adhesive. The surface layer is then applied on top to provide protection and improve the roof’s appearance.

One of the major advantages of modified bituminous roofing is its lifespan. With proper installation and maintenance, a modified bituminous roof can last up to 20 years, making it a cost-effective choice in the long run. The material is also highly resistant to water, which minimizes the risk of leaks and water damage, making it a popular choice for flat roofs.

In conclusion, modified bituminous roofing is a durable, flexible, and cost-effective roofing solution that is suitable for a variety of commercial and residential applications. With its enhanced properties, it offers better protection against harsh weather conditions, and its lifespan makes it a practical choice for long-term roofing needs.

Benefits of Using Bituminous Roofing Systems

Benefits of Using Bituminous Roofing Systems

Bituminous roofing systems, also known as asphalt roofing systems, have been used for decades in the construction industry for various types of buildings. These systems are made up of bituminous materials, such as asphalt, and can provide several benefits to building owners. Here are some of the main benefits of using bituminous roofing systems:

1. Durability: Bituminous roofing systems are known for their durability and longevity. The bituminous materials used in these systems can withstand harsh weather conditions, such as extreme temperatures, heavy rains, and strong winds. This makes them a popular choice for buildings in areas with harsh weather conditions.

2. Cost-effective: Bituminous roofing systems are relatively affordable compared to other roofing materials such as metal or tile. Not only are the materials cost-effective, but the installation process is also typically quicker and easier, resulting in lower labor costs. This makes bituminous roofing systems an attractive option for building owners on a budget.

3. Flexibility: Bituminous roofing systems can be installed on a variety of different roof types, including flat roofs and sloped roofs. The flexibility of these systems makes them a versatile choice for a wide range of building types, from residential homes to commercial and industrial buildings.

4. Low maintenance: Bituminous roofing systems require minimal maintenance, making them a convenient option for building owners. These roofs can withstand foot traffic and are resistant to tears, punctures, and other damages. This means that building owners can save on maintenance and repair costs in the long run.

5. Energy efficiency: Bituminous roofing systems are energy efficient as they absorb and reflect heat, reducing the amount of heat entering the building. This can help reduce energy costs for cooling in warmer climates. Additionally, the reflective properties of these roofs can help extend its lifespan by reducing the effects of UV rays.

6. Fire-resistant: The bituminous materials used in these roofing systems have a fire-resistant coating, providing an added layer of protection for the building. This can be especially beneficial for buildings in areas prone to wildfires.

7. Environmentally friendly: Bituminous roofing systems are typically made with recyclable materials, making them an environmentally friendly choice. Additionally, as these roofs can last for decades, they reduce the need for frequent replacements, resulting in less waste.

In conclusion, bituminous roofing systems offer numerous benefits for building owners, including durability, cost-effectiveness, flexibility, low maintenance, energy efficiency, fire resistance, and eco-friendliness. With proper installation and maintenance, these roofs can provide long-lasting protection for buildings.


In conclusion, built-up roofing has been proven to be a reliable and cost-effective option for commercial and industrial buildings. Its long track record of durability and weather resistance make it a popular choice among building owners and contractors. With its multiple layers of protection and customizable options, built-up roofing can provide a strong and long-lasting solution for any roofing needs. As new advancements in technology and materials emerge, built-up roofing will continue to evolve and adapt, solidifying its place as a top choice in the roofing industry. As more building owners are introduced to the benefits of built-up roofing, it is expected to see a rise in its usage in the years to come. Ultimately, built-up roofing provides a solid investment for any building owner looking for a reliable and

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