What is the maximum moisture percentage allowed for crushed stone and gravel?

The maximum moisture percentage allowed for crushed stone and gravel is 2.0%. This specification is important in construction and roofing applications as excessive moisture in these materials can affect their performance and durability. High moisture levels can lead to problems such as reduced bond strength, increased weight, and an unstable substrate, which could compromise the integrity of the roof system. Ensuring that the moisture content is kept at or below 2.0% helps to maintain the effectiveness of the surfacing materials and contributes to the longevity and reliability of the roofing installation.