Introduction of Built-Up Roofing


Introduction of Built-Up Roofing

Built-up roofing is a popular choice for commercial and industrial buildings due to its durability, affordability, and ease of installation. It has been used for more than a century and has evolved to become a reliable and versatile roofing system. With the advancements in technology and materials, built-up roofing has become a more attractive option for a wide range of buildings. In this article, we will discuss the basics of built-up roofing, its advantages, and some of the latest innovations in this roofing system to help you better understand its value and benefits. Whether you are a building owner, contractor, or simply someone interested in roofing, this article will provide you with a comprehensive introduction to built-up roofing.

What is Built-Up Roofing (BUR)

Built-Up Roofing (BUR) is a popular and long-standing roofing system used in commercial and industrial buildings. It is a type of flat roofing system that is made up of layers of bitumen and reinforcing materials. BUR is also commonly known as tar and gravel roofing because of the usage of bitumen and gravel on the top layer.

The history of BUR can be traced back to the 19th century when it was first used on flat roofs of commercial buildings. It gained widespread popularity in the early 20th century due to the easily available materials and installation techniques.

The main components of a BUR system are the base sheet, the ply sheet, the felt, and the cap sheet. The base sheet is commonly made of asphalt-impregnated organic or fiberglass felt. The ply sheet is a layer of reinforcing material, usually fiberglass or polyester, that provides strength and stability to the roof. The felt layer is made up of multiple layers of saturated organic felt, and it acts as a moisture barrier. The cap sheet is the topmost layer, which is made of a waterproof material such as gravel, mineral granules, or asphalt.

The installation process of BUR involves heating bitumen, a sticky and viscous substance, to make it liquid and then applying it to the roof’s surface. The reinforcing material and felt layers are then firmly pressed onto the bitumen to form a strong bond. The process is repeated until the desired number of layers is achieved, and the final layer of cap sheet material is added.

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BUR roofing has several advantages. It is highly durable and can last for up to 40 years with proper maintenance. The multiple layers of bitumen provide excellent waterproofing and protection against UV rays and extreme weather conditions. BUR is also relatively low-cost compared to other roofing systems, making it a popular choice for commercial and industrial buildings.

However, BUR also has some limitations. The installation process can be time-consuming and requires skilled labor. It is also a heavy roofing system, so the building must be structurally strong enough to support its weight.

In conclusion, Built-Up Roofing (BUR) is a time-tested and reliable roofing system suitable for flat or low-sloped roofs. Its multiple layers of bitumen and reinforcing materials make it durable, waterproof, and suitable for various weather conditions. With proper installation and maintenance, BUR can provide strong and long-lasting protection to buildings.

Modified Bituminous Roofing

Modified Bituminous Roofing

Modified Bituminous Roofing (MBR), also known as mod-bit roofing, is a type of roofing system that is widely used in the construction industry. It is a modern and popular alternative to traditional built-up roofing systems and offers numerous advantages including durability, flexibility, and ease of installation.

MBR consists of multiple layers that are designed to provide superior protection against moisture, UV rays, and other weather elements. The top layer is made of specially formulated bitumen, or asphalt, which is reinforced with various additives such as rubber, polyester, or fiberglass. These additives enhance the strength and durability of the bitumen and help it adhere to the roofing layers below. The bottom layer is usually made of a fiberglass or polyester mat, which serves as a stabilizing base for the bitumen layer.

One of the biggest advantages of MBR is its flexibility. The bitumen layer, combined with the reinforcing additives, allows the roofing membrane to stretch and contract with temperature changes without causing cracks or tears in the membrane. This flexibility also makes MBR suitable for use on roofs with complex shapes and slopes, as it can easily conform to any surface.

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Another significant advantage of MBR is its durability. The bitumen layer is highly resistant to UV rays, which can cause damage to other roofing materials over time. Additionally, the reinforcing additives make the roofing membrane more resistant to punctures, tears, and other physical damage.

The installation process of MBR is relatively easy and can be performed using different methods such as torch-applied, hot-mopped, or self-adhered. These different application methods make it suitable for use in various weather conditions and building types.

MBR has a long lifespan, with an average of 25-30 years, and requires minimal maintenance during its lifespan. However, it is essential to conduct regular inspections and perform minor repairs to ensure its longevity.

In terms of cost, MBR is considered a cost-effective roofing option, especially when compared to other roofing systems such as single-ply or metal roofing. Its low installation and maintenance costs combined with its long lifespan make it an attractive choice for building owners.

In conclusion, Modified Bituminous Roofing is a durable, flexible, and cost-effective roofing system that offers superior protection against weather elements. Its installation process is relatively easy, making it a popular choice for commercial and residential buildings alike. Consider using MBR for your next roofing project to reap the numerous benefits it offers.

Benefits of Using Bituminous Roofing Systems

Benefits of Using Bituminous Roofing Systems

Bituminous roofing systems have been widely used in the construction industry for many years and continue to be a popular choice for building owners and contractors. This type of roofing system is made up of multiple layers of bitumen, which is a sticky, black and viscous form of petroleum. The bitumen is reinforced with a fibrous material such as fiberglass or polyester to increase its strength and durability. Here are some of the key benefits of using bituminous roofing systems.

1. Affordable and Cost-Effective:

Bituminous roofing systems are one of the most cost-effective roofing options available. The materials used are relatively inexpensive, and the installation process is quick and easy, reducing labor costs. Additionally, the life expectancy of a bituminous roof can range from 15-30 years, making it a long-term investment that can save on future repair and replacement costs.

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2. Durable and Weather Resistant:

Bituminous roofing systems are highly resistant to harsh weather conditions, including heavy rain, strong winds, and extreme temperature fluctuations. The multiple layers of bitumen and reinforcement provide a strong and impenetrable barrier against water, protecting the building from leaks and water damage.

3. Low Maintenance:

Bituminous roofing systems require minimal maintenance, making them a practical choice for building owners. The smooth surface of the roof is easy to clean, and small repairs can be easily made without the need for specialized equipment or expertise.

4. Versatile:

Bituminous roofing systems can be used on a variety of buildings, including residential, commercial, and industrial structures. They are suitable for flat, low-sloped, and even slightly pitched roofs, making them a versatile option for different building designs.

5. Energy Efficient:

The dark color of bitumen roofing can help absorb heat from the sun, reducing energy costs for cooling during the warmer months. Additionally, some bituminous roofing systems can be installed with insulation layers, further improving energy efficiency and reducing heating costs in colder months.

6. Eco-Friendly:

Many bituminous roofing systems are made from recycled materials, making them an eco-friendly option for those looking to reduce their carbon footprint. The longevity of a bituminous roof also means fewer resources are used in its replacement, making it a sustainable choice.

In conclusion, bituminous roofing systems offer numerous benefits for building owners, including affordability, durability, low maintenance, versatility, energy efficiency, and eco-friendliness. By choosing a bituminous roofing system, building owners can have peace of mind knowing they have a secure and long-lasting roofing solution for their property.


Overall, the introduction of built-up roofing has been a game changer in the roofing industry. With its proven durability, cost-effectiveness, and versatility, it has become a popular choice for commercial and industrial buildings across the globe. The multiple layers of asphalt and reinforcement materials provide superior protection against extreme weather conditions and can last for decades with proper maintenance. Additionally, the various customization options and green roofing initiatives make it a sustainable option for environmentally conscious businesses. As the demand for reliable and long-lasting roofing solutions increases, built-up roofing continues to evolve and adapt, making it a top choice for any construction project. In conclusion, the introduction of built-up roofing has revolutionized the industry, setting a new standard for quality and longevity in commercial roofing.


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