What could be a potential cause of blistering on an SBS roof?

Blistering on an SBS ( Styrene-Butadiene-Styrene) roof can indeed be primarily caused by voids in the interply moppings. When there are voids or gaps in the adhesive between the layers of the roofing system, air can become trapped. As temperatures rise, this trapped air expands, leading to the formation of blisters on the roof surface. This issue can compromise the integrity of the roofing system, as blisters can allow moisture penetration, ultimately affecting the longevity and performance of the roof.

Inadequate insulation is typically associated with other issues, such as energy inefficiency or condensation problems, rather than direct blistering. Excessive heat during application might lead to other issues with the roofing materials but is not the primary cause of blistering itself. Lastly, while using non-compatible materials can certainly lead to various roof performance issues, including adhesion failures or early degradation, it is the specific mechanic of voids in the adhesive layer that directly causes the blisters. Thus, the presence of these voids is a crucial factor to consider when diagnosing and addressing blistering in SBS roofing systems.