What is the base material used for roll roofing?

Prepare effectively for the InterNACHI Roofing Exam. Review multiple choice questions and detailed explanations for each. Enhance your knowledge and ace your exam with confidence!

The base material used for roll roofing is typically felt. This material is made from organic or fiberglass strands, which provide a base that is saturated with asphalt to enhance waterproofing. Felt serves as a durable, flexible substrate that can withstand the elements, making it ideal for roll roofing applications. This type of roofing is commonly used in low-slope and flat roofing systems, as it can be easily rolled out in large sections, allowing for efficient installation.

The selection of felt as the base material is crucial for the roof's performance, as it not only aids in waterproofing but also adds to the overall strength and stability of the roofing system. The asphalt used in conjunction with felt creates a weather-resistant barrier that effectively protects against moisture infiltration.

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