40 Hour Property and Building Inspection Practice Test

Which of the following statements is true regarding glass fibers in shingles?

1. They increase fire resistance

2. They often break during installation

3. They are the main cause of deterioration

4. They alternately reduce durability

The correct answer is: They increase fire resistance

The statement that glass fibers in shingles increase fire resistance is accurate because glass fibers are inherently fire-resistant materials. This quality significantly enhances the overall fire rating of asphalt shingles, making them less prone to igniting from external sources, such as sparks or embers. When glass fibers are incorporated into shingles, they provide structural support while offering protection against heat and flames, contributing positively to the safety and longevity of roofing materials. Other options do not accurately reflect the attributes of glass fibers. While some types of shingles can experience issues during installation, glass fibers themselves are manufactured to be relatively stable and do not typically shatter easily. They are not the primary cause of deterioration in shingles; in fact, they help increase the lifespan of the roof by resisting impacts and weathering. Additionally, glass fibers do not inherently reduce durability; instead, they work to strengthen the shingle’s structure, improving its performance across various environmental conditions.