What type of material is commonly used for fire resistance in roofing membranes?

The correct response highlights the use of mineral granules in roofing membranes due to their ability to enhance fire resistance. Mineral granules are typically incorporated into various roofing materials, especially in modified bitumen and some asphalt shingles. Their inherent properties contribute to creating a protective layer that helps to deflect heat and prevents the spread of flames.

Mineral granules are significant because they can withstand high temperatures and are less combustible than other materials, providing a crucial safety feature for buildings. In roofing systems, fire resistance is vital, particularly in areas prone to wildfires or where building codes require enhanced fire safety measures.

The other choices do not offer similar fire-resistant qualities. Wood fibers and wood shingles, while natural materials used in roofing, are more susceptible to ignition and fire spread. Styrofoam, often used for insulation, lacks the necessary fire-resistant properties, making it unsuitable for use as a roofing membrane material. Thus, mineral granules stand out as a practical and effective choice for fire resistance in roofing applications.