Illinois Roof Deck Replacement Requirements: When the IRC and IL Energy Code Require Full Sheathing Replacement
Direct Answer: When Is Roof Deck Replacement Required in Illinois? In Illinois, roof deck replacement may be required when the existing roof sheathing is not a code-compliant base for the new roof covering. Under the 2018 International Residential Code, asphalt shingles must be installed over a solidly sheathed deck, fasteners must properly penetrate the deck,…