Which type of asphalt can lead to performance issues in built-up roofing?

The selection of the wrong type of asphalt for built-up roofing is crucial because different types of asphalt possess varying properties that affect performance. For built-up roofing systems, specific asphalt types are formulated for enhanced durability, flexibility, adhesion, and resistance to weathering. Using an inappropriate asphalt type can result in issues such as blistering, cracking, or delamination of the roofing layers.

For instance, using a low-grade asphalt that does not offer sufficient adhesion can compromise the integrity of the roof, leading to moisture infiltration and ultimately reducing the lifespan of the roofing system. It's essential to choose the correct type of asphalt, as it directly influences the roof's ability to withstand environmental stresses and maintain its function over time.

Correctly applied asphalt, while important for ensuring proper installation and performance, does not address the fundamental compatibility and properties of the asphalt itself. Similarly, modified asphalt, which is specifically designed for certain applications, is not the sole type that can cause performance issues; instead, it is the use of the wrong asphalt type in general that poses the most significant risk. Therefore, identifying and using the right type of asphalt is essential for the longevity and reliability of built-up roofing systems.