Mineral-surfaced roll roofing deck is solid and sloped


The deck must be solidly sheathed for mineral-surfaced roll roofing to be installed. Although mineral-surfaced roll roofing provides a virtually weather-tight roof surface, it is still necessary that water flow be positive toward the drainage points. Therefore, a minimum slope of 1:12 is required for roof decks that are covered with mineral-surfaced roll roofing.