Built-up roofing, also known as BUR, is a popular and widely used roofing system that has been in existence for over a century. It is known for its durability, water resistance, and cost-effectiveness. However, like any other roofing system, built-up roofing has its pros and cons. In this article, we will delve into the advantages and disadvantages of built-up roofing, helping you make an informed decision when it comes to your roofing needs.
Introduction to Built-Up Roofing
Built-up roofing is a type of roofing system that consists of multiple layers of roofing felt, asphalt, and aggregate, such as gravel or stone. The layers are applied in a specific order to create a watertight seal. The roofing felt is typically made of a fiberglass mat or organic felt, which is then coated with asphalt. The asphalt coating provides waterproofing and UV protection, while the aggregate helps to protect the roof from weathering and damage.
History of Built-Up Roofing
Built-up roofing has been around since the early 1900s, when it was first used on commercial buildings. Over the years, the system has evolved to become more durable and water-resistant. The introduction of new materials, such as fiberglass and asphalt, has improved the performance and lifespan of built-up roofing systems. Today, built-up roofing is used on a wide range of buildings, from residential homes to large commercial complexes.
Components of Built-Up Roofing
A built-up roofing system typically consists of the following components:
The roofing felt, which is the base layer of the system
The asphalt coating, which provides waterproofing and UV protection
The aggregate, which helps to protect the roof from weathering and damage
The surfacing material, which can be either a smooth or perforated sheet
Pros of Built-Up Roofing
Built-up roofing has several advantages that make it a popular choice among building owners. Some of the key benefits include:
The system is highly durable and can last for up to 30 years or more with proper maintenance
It is resistant to water and weathering, making it an excellent choice for buildings in areas with high rainfall or extreme temperatures
Built-up roofing is also resistant to foot traffic, making it ideal for buildings with frequent roof access
The system is relatively inexpensive compared to other roofing systems, such as single-ply roofing
Built-up roofing can be installed on a wide range of roof types, including flat, sloping, and curved roofs
It is also an excellent choice for buildings with complex roof designs, such as multiple valleys and skylights
Cost-Effectiveness of Built-Up Roofing
One of the main advantages of built-up roofing is its cost-effectiveness. The system is relatively inexpensive to install, and it can last for up to 30 years or more with proper maintenance. The cost of built-up roofing can vary depending on the size of the roof, the type of materials used, and the complexity of the installation. However, on average, the cost of built-up roofing is lower than that of other roofing systems, such as single-ply roofing.
Sustainability of Built-Up Roofing
Built-up roofing is also a sustainable option for building owners. The system is made from recycled materials, such as asphalt and aggregate, which reduces waste and minimizes the environmental impact of the roof. Additionally, built-up roofing can be repaired and maintained easily, which extends its lifespan and reduces the need for frequent replacements.
Cons of Built-Up Roofing
While built-up roofing has several advantages, it also has some disadvantages. Some of the key drawbacks include:
The system can be heavy, which can put additional stress on the building’s structure
Built-up roofing can be prone to leaks, especially if the system is not installed correctly
The system can also be damaged by extreme weather conditions, such as high winds and hail
Built-up roofing can be difficult to repair, especially if the damage is extensive
The system can also be hazardous to install, especially for workers who are not properly trained
Challenges of Built-Up Roofing Installation
One of the main challenges of built-up roofing installation is the weight of the system. The multiple layers of roofing felt, asphalt, and aggregate can be heavy, which can put additional stress on the building’s structure. This can be a problem, especially for older buildings that may not be designed to handle the weight of a built-up roofing system.
Maintenance Requirements of Built-Up Roofing
Built-up roofing requires regular maintenance to ensure its longevity. The system needs to be inspected regularly for signs of damage, such as cracks and leaks. The aggregate layer also needs to be replaced periodically to maintain the roof’s water-resistance. Additionally, the system needs to be cleaned regularly to remove debris and dirt that can accumulate on the surface.
Conclusion
Built-up roofing is a popular and widely used roofing system that offers several advantages, including durability, water resistance, and cost-effectiveness. However, it also has some disadvantages, such as its weight, proneness to leaks, and difficulty of repair. By understanding the pros and cons of built-up roofing, building owners can make an informed decision when it comes to their roofing needs. It is essential to consult with a professional roofing contractor to determine whether built-up roofing is the right choice for your building. With proper installation, maintenance, and repair, a built-up roofing system can provide years of reliable service and protection for your building.
Final Thoughts
In conclusion, built-up roofing is a reliable and cost-effective roofing system that offers several benefits for building owners. While it has some disadvantages, the advantages of built-up roofing make it a popular choice among building owners. By understanding the pros and cons of built-up roofing, you can make an informed decision when it comes to your roofing needs. Remember to consult with a professional roofing contractor to determine whether built-up roofing is the right choice for your building. With the right installation, maintenance, and repair, a built-up roofing system can provide years of reliable service and protection for your building.
For more information on built-up roofing, and to get a better understanding of the pros and cons, the following table can be helpful:
| Pros | Cons |
|---|---|
| Durable and long-lasting | Heavy and can put additional stress on the building’s structure |
| Water-resistant and UV-protected | Prone to leaks if not installed correctly |
| Cost-effective and inexpensive to install | Difficult to repair, especially if the damage is extensive |
| Sustainable and made from recycled materials | Hazardous to install, especially for workers who are not properly trained |
By considering these points, you can decide whether built-up roofing is the right choice for your building, and ensure that your roof provides years of reliable service and protection.
What is built-up roofing and how does it work?
Built-up roofing, also known as BUR, is a type of roofing system that has been in use for over a century. It consists of multiple layers of roofing materials, typically including asphalt, felt, and aggregate, which are stacked on top of each other to create a solid, watertight surface. The layers are applied in a specific order, with the asphalt layer serving as the adhesive that holds the system together. The felt layer provides additional strength and stability, while the aggregate layer adds weight and helps to protect the roof from UV damage and weathering.
The built-up roofing system works by providing a barrier against water and weather, while also allowing for expansion and contraction due to temperature changes. The multiple layers work together to create a strong and durable surface that can withstand the elements and last for many years. Built-up roofing is often used on flat or low-sloping roofs, as it provides a smooth, even surface that can be easily maintained and repaired. Additionally, built-up roofing can be customized to meet specific building needs and budgets, making it a popular choice for commercial and industrial applications.
What are the pros of built-up roofing?
The pros of built-up roofing include its durability, cost-effectiveness, and ease of maintenance. Built-up roofing systems can last for 20-30 years or more, making them a long-term solution for building owners. Additionally, built-up roofing is often less expensive than other roofing options, such as single-ply membranes or metal roofing. The system is also relatively easy to repair and maintain, as individual layers can be replaced or repaired as needed. This makes built-up roofing a popular choice for buildings with limited budgets or resources.
Another advantage of built-up roofing is its ability to withstand extreme weather conditions, such as heavy rain, hail, and wind. The multiple layers of the system provide a high level of protection against water and weather damage, making it a reliable choice for buildings in areas with harsh climates. Furthermore, built-up roofing can be customized to meet specific building needs, such as adding additional insulation or reflective coatings to improve energy efficiency. Overall, the pros of built-up roofing make it a popular and practical choice for many building owners.
What are the cons of built-up roofing?
The cons of built-up roofing include its weight, installation challenges, and potential for leakage. Built-up roofing systems can be extremely heavy, which can put additional stress on a building’s structure and foundation. This can be a concern for older buildings or those with weak structural elements. Additionally, built-up roofing can be difficult to install, as it requires specialized labor and equipment. The system must be applied in a specific order, and any mistakes or imperfections can lead to leaks and other problems.
Another con of built-up roofing is its potential for leakage, particularly at seams and joints. The multiple layers of the system can create opportunities for water to penetrate, especially if the system is not properly installed or maintained. Furthermore, built-up roofing can be prone to blistering and cracking, which can lead to further damage and repairs. To mitigate these risks, building owners must ensure that their built-up roofing system is regularly inspected and maintained, and that any repairs are made promptly and correctly.
How is built-up roofing installed?
Built-up roofing is installed in a layer-by-layer process, typically starting with a base layer of asphalt or other adhesive. The felt layer is then applied on top of the base layer, followed by additional layers of asphalt and aggregate. Each layer must be carefully applied and smoothed to create a uniform surface. The installation process requires specialized labor and equipment, as well as a high degree of attention to detail. The entire process can take several days or weeks to complete, depending on the size and complexity of the roof.
The installation process for built-up roofing also involves preparing the roof surface, which includes cleaning and priming the area to ensure a strong bond between the roofing system and the building. The installer must also ensure that the roof is properly sloped and drained, to prevent water from accumulating and causing damage. Additionally, the installer must follow safety protocols to prevent accidents and injuries, as built-up roofing installation can be a hazardous process. By following these steps and guidelines, installers can ensure a successful and long-lasting built-up roofing system.
Can built-up roofing be repaired or replaced?
Yes, built-up roofing can be repaired or replaced, depending on the extent of the damage or wear. Repairs can be made to individual layers or components of the system, such as replacing damaged felt or aggregate. In some cases, the entire system may need to be replaced, especially if the roof is old or has suffered significant damage. Replacement can be a major undertaking, requiring specialized labor and equipment. However, it can also be an opportunity to upgrade to a newer, more efficient roofing system.
The repair or replacement process for built-up roofing typically involves inspecting the roof to identify the source and extent of the damage. The inspector will look for signs of wear, such as cracks, blisters, or leaks, and assess the condition of the individual layers. Based on the inspection, the repair or replacement plan can be developed, which may involve removing damaged layers, applying new materials, or installing a completely new system. By addressing problems promptly and correctly, building owners can extend the life of their built-up roofing system and prevent more costly repairs down the line.
How does built-up roofing compare to other roofing options?
Built-up roofing compares favorably to other roofing options in terms of cost and durability. Compared to single-ply membranes, built-up roofing is often less expensive and can provide better protection against weather and water damage. However, single-ply membranes may be easier to install and maintain, and can provide better reflectivity and energy efficiency. Compared to metal roofing, built-up roofing is often less expensive and can provide better soundproofing and insulation. However, metal roofing can be more durable and resistant to weathering, and can provide a more modern, sleek appearance.
In terms of other roofing options, such as spray foam or modified bitumen, built-up roofing has its own unique advantages and disadvantages. Spray foam roofing, for example, can provide excellent insulation and energy efficiency, but may be more expensive and difficult to install. Modified bitumen roofing can provide a high level of durability and resistance to weathering, but may be more prone to cracking and blistering. By considering these factors and comparing built-up roofing to other options, building owners can make an informed decision about which roofing system is best for their needs and budget.