Residential Roofing Replacement

Permit Submittal Requirements

  • Permit Application
  • Residential Reroofing Affidavit
  • Contract on company letterhead
  • Copy of Driver’s License
  • Illinois State Roofing License

Construction Requirements and Slope

  • Where the new roof covering is installed by the roof covering manufacturer’s approved instructions.
  • NEW sheathing edges are required to be tongue and groove or supported with solid blocking, edge clips (H-clips), or per manufacturer's specifications. (When rafters/trusses are spaced 24" on center.)
  • Nailing schedule per 2021 IRC, Table 602.3(2): 8d common nails, 3" spacing at edges, and 6" intermediate support is required.
  • A NEW sheathing shall be a minimum 1/2-inch thickness.  Existing 3/8-inch sheathing may remain if not compromised, rotted, deteriorated, moldy, etc.
  • All existing bath fans and dryer vents must terminate to outside air. Any existing bath fans or dryer vents found to be terminating into the attic shall be modified in such a manner as to terminate to the outside air.    

SECTION R905

  • R905.1 Roof covering application. Roof coverings shall be applied by the applicable provisions of this section and the manufacturer’s installation instructions.
  • R905.2.1 Asphalt shingles. The installation of asphalt shingles shall comply with the provisions of this section.
  • R905.2.1 Sheathing requirements. Asphalt shingles shall be fastened to solidly sheathed decks.

Slope is determined by rise and run. For example, a 4-inch rise in 12-inch run equals 4/12 slope or pitch.

Required Inspections

  • Sheathing (plywood)
  • Ice and Water 
  • Final

Contractor Requirements


Please be advised that all Roofing Contractors must hold a valid license issued by the State of Illinois and have proof of Liability and Workers Compensation insurance coverage on file with the Building Department before a permit can be issued.

State of Illinois Requirement Workers

Per the Illinois Roofing Industry Licensing Act, 225 ILCS 335/5.1, every roofing contractor shall affix the roofing license number and the licensee's name, as it appears on the license, on all letterhead and commercial vehicles used as part of his or her business as a roofing contractor.

No roofing permits will be processed without this documentation.