When it comes to roofing options for flat roofs, Built-Up Roofing (BUR) is a time-tested and popular choice. BUR, also known as tar and gravel roofing, has been used for over a century and continues to be a viable option for both commercial and residential flat roofs. In this article, we’ll explore the pros and cons of BUR roofing to help you make an informed decision for your roofing needs.
Pros of Built-Up Roofing (BUR):
1. Durability
One of the primary advantages of BUR roofing is its exceptional durability. BUR systems are constructed by layering multiple plies of roofing felt or fiberglass mat with bitumen (asphalt or coal tar). This layering flat roofing Cardiff creates a thick and robust roofing system that can withstand the harsh elements, including UV radiation, rain, snow, and wind. BUR roofs can last 20 to 30 years or even longer with proper maintenance.
2. Waterproofing
BUR roofs offer outstanding waterproofing capabilities. The multiple layers and the application of hot bitumen create a seamless, watertight surface that effectively prevents water infiltration. This is crucial for flat roofs, as they are more prone to water pooling, which can lead to leaks and structural damage.
3. Fire Resistance
Unlike some other roofing materials, BUR roofing is highly fire-resistant. Coal tar BUR, in particular, has excellent fire-resistant properties, making it a preferred choice for areas prone to wildfires or industrial settings where fire safety is paramount.
4. Energy Efficiency
BUR roofing systems can be designed to have high reflectivity and emissivity properties. By incorporating reflective surfacing materials and cool roofing techniques, BUR roofs can help reduce the heat absorbed by the building, resulting in lower cooling costs during hot summer months.
5. Maintenance
Maintaining a BUR roof is relatively straightforward. Regular inspections and minor repairs can extend the lifespan of the roof significantly. Additionally, the layered nature of BUR allows for easy patching and resealing of damaged areas.
Cons of Built-Up Roofing (BUR):
1. Weight
One of the notable drawbacks of BUR roofing is its weight. The multiple layers of roofing materials, along with the bitumen, can make BUR roofs quite heavy. This weight can be a concern for older structures that may not have been designed to support the additional load. It’s essential to assess the building’s structural capacity before installing a BUR roof.
2. Installation Complexity
Installing a BUR roof is a labor-intensive and complex process that requires skilled professionals. The process involves heating and applying bitumen, which can be hazardous and may release unpleasant fumes. Improper installation can lead to issues such as uneven surfaces and leaks.
3. Limited Aesthetics
BUR roofing is not known for its aesthetic appeal. It has a utilitarian appearance characterized by layers of bitumen and gravel. If aesthetics are a priority for your flat roof, you may need to consider other roofing options, such as single-ply membranes or modified bitumen.
4. Maintenance and Repairs
While maintenance for BUR roofing is generally straightforward, it is essential to address any issues promptly. Over time, the surface may deteriorate, leading to cracks or blisters. These issues can compromise the roof’s performance and require professional repairs. Regular maintenance is crucial to ensure the longevity of the BUR system.
5. Environmental Concerns
BUR roofing materials, particularly coal tar, raise environmental concerns due to their composition. Coal tar is a byproduct of coal processing and contains potentially harmful chemicals. While modern BUR systems often use asphalt instead of coal tar to mitigate these concerns, environmental considerations are still relevant.
In conclusion, Built-Up Roofing (BUR) offers a range of advantages and disadvantages for flat roofs. Its durability, waterproofing capabilities, fire resistance, and energy efficiency make it a solid choice for many commercial and residential buildings. However, the weight of BUR roofs, installation complexity, limited aesthetics, and environmental concerns are factors that must be carefully considered.
Before deciding on BUR roofing for your flat roof, it’s essential to consult with a professional roofing contractor who can assess your specific needs and the suitability of BUR for your building. Additionally, exploring alternative roofing options, such as single-ply membranes or modified bitumen, may be worthwhile to ensure you make the best choice for your roofing project. Ultimately, the pros and cons of BUR roofing should be weighed against your priorities and the unique requirements of your flat roof.
The post The Pros and Cons of Built-Up Roofing (BUR) for Flat Roofs appeared first on go2fly.