What happens to roofing asphalt if it is applied too thickly in hot weather?

• A. It will harden quickly.
• B. It will erode.
• C. It will move or "flow."
• D. It will cool immediately.

Answer: (C)

When roofing asphalt is applied too thickly during hot weather, it is likely to move or "flow." This behavior is primarily due to the increased temperatures that can soften the asphalt, making it more viscous. When the material is overly thick, the excess weight can create internal stresses, resulting in the asphalt being unable to maintain its shape. Instead, it will start to deform under its own weight, leading to a flow-like condition. This movement can compromise the integrity of the roofing installation, potentially creating issues with drainage or leading to areas of weakness in the roof structure. Proper application techniques, including adhering to recommended thickness guidelines, are essential to ensure the longevity and effectiveness of the roofing system.