If granules in asphalt shingles are embedded too deeply, what issue may arise?

When granules in asphalt shingles are embedded too deeply, one of the significant issues that may arise is staining from asphalt bleed through. This phenomenon occurs because the protective granules are meant to shield the asphalt from UV rays and other weather-related elements. If the granules are not effectively covering the asphalt layer, this exposure can lead to the asphalt underneath oxidizing and bleeding through the granule layer, resulting in unsightly stains on the roof surface.

In the context of roofing, the granules serve multiple purposes, including providing color, protecting the underlying layers, and improving the roof's overall durability. If they sink too deeply into the asphalt, the sealing properties are compromised, leading not just to staining but potentially affecting the longevity and effectiveness of the roofing material as a whole.

The other issues listed, such as separation of layers, loss of color, and increased weight, are not direct results of deep granule embedment. Although they might be concerns in other contexts of roofing, they are less directly related to the specific problem of granule embedment. Staining from asphalt bleed through is the most prominent and immediate consequence, making it the focus of concern in this scenario.