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All roof covering materials must be delivered in packages bearing the manufacturers identifying marks and approved testing agency labels when required.
All asphalt shingles must be either self-sealing or interlocking.
The code requires that roof decks be solidly sheathed for asphalt shingles or mineral-surfaced roll roofing. Solid sheathing may be plywood, OSB, or 1-inch nominal boards.
Wood shingles and shakes may be applied over solid or spaced sheathing.