What is the primary risk associated with asphalt roofing in high temperatures?

In high temperatures, asphalt roofing experiences a risk of flowing or movement due to its thermoplastic nature. Asphalt becomes softer and more pliable when exposed to elevated temperatures, which can lead to deformation. This is particularly critical in built-up roofing systems where the integrity of the surface must be maintained to protect underlying layers and prevent water infiltration.

The movement of asphalt can result in ridges, buckles, or even pooling, which undermines the roof’s effectiveness and may lead to early failure. Understanding this characteristic of asphalt under heat is crucial for roofing professionals to ensure proper installation practices and material selection that caters to the specific climate and conditions of the installation area.