What issue can arise from the presence of moisture within the roofing layers?

The presence of moisture within the roofing layers can lead to delamination, which is the separation of layers in a roofing system. This occurs when water infiltrates the roofing materials, compromising their adhesive properties and causing them to lose bond strength. As the layers begin to separate, structural integrity is compromised, potentially leading to more severe issues such as leaks, insulation damage, and reduced overall performance of the roofing system.

Delamination is particularly concerning in multi-layer roofing systems like built-up roofs or certain membrane types, since the moisture can become trapped between layers and accelerate decay or deterioration. Understanding this issue is vital for maintaining the longevity and effectiveness of roofing materials, making it a key consideration for roofing professionals.