What material is commonly used as the base for modern asphalt shingles?

The use of glass fiber as the base for modern asphalt shingles is significant for several reasons. Glass fiber provides enhanced strength and durability compared to other materials. It is lightweight, which contributes to easier handling and installation. Additionally, glass fiber is resistant to moisture, which helps prevent mold and mildew growth, thereby extending the lifespan of the shingles.

Furthermore, glass fiber has a non-combustible property, making it a safer choice for roofing materials. This resistance to fire translates into better performance in various weather conditions and climates, making them a preferred option for many roofing applications. The reinforcement provided by the glass fiber mat contributes to the overall stability and integrity of the asphalt shingles, ensuring that they maintain their shape and effectiveness over time.

In contrast, materials like wood pulp, paper felt, and metal do not provide the same level of performance or durability as glass fiber when used as a base for asphalt shingles. Wood pulp, while it has been used in the past, is much more susceptible to deterioration from moisture and is less effective in providing structural support. Paper felt lacks the strength and fire resistance that glass fiber offers, and though metal can be utilized in roofing, it is distinct from asphalt shingles and is not a typical base material for them.