Low. Requires specialized tools, materials handling, significant safety precautions for working at height, and adherence to specific installation techniques to ensure weather resistance and code compliance.
Cedar shake restoration involves specialized materials and installation techniques, requiring skilled labor and careful adherence to manufacturer specifications and IRC provisions. Safety at height is a significant factor. Assessing existing roof structure, ensuring proper underlayment, and correct shake application to prevent leaks and ensure longevity requires expertise. Furthermore, any interaction with existing electrical service masts or plumbing vent stacks requires careful coordination with NEC and Illinois Plumbing Code standards respectively, adding layers of complexity. DuPage County's climate demands robust roof systems to withstand freeze-thaw cycles and heavy snow loads.
Project Guidelines & Rules
Permitting & Administration
3 Rules
Obtain necessary permits from your local municipality prior to commencing any work.
IRC R105.1, R105.2
Schedule required inspections (e.g., pre-installation, final) through the local building department.
IRC R109.1
Adhere to all local zoning ordinances and applicable homeowner association (HOA) covenants.
IRC R102.6, Local Ordinance
Materials & Components
4 Rules
Cedar shakes and shingles shall be naturally durable wood (e.g., cedar, redwood) or treated wood conforming to ASTM D3468.
IRC R905.7.1
Underlayment must be a minimum of No. 15 asphalt felt or other approved materials, applied over solid sheathing.
IRC R905.7.4, R905.1.1
Fasteners for cedar shakes shall be corrosion-resistant (e.g., stainless steel, hot-dipped galvanized), minimum 14-gauge, long enough to penetrate the sheathing by 3/4 inch (19.1 mm) or through the sheathing.
IRC R905.7.3
Flashing materials for valleys, penetrations, and intersections must be corrosion-resistant metal or approved non-metallic material.
IRC R905.7.6, R905.2.8.2
Installation & Application Requirements
6 Rules
Cedar shakes shall be applied in accordance with the manufacturer's installation instructions.
IRC R905.7.7
Shakes shall be laid with an exposed length as specified by manufacturer but not exceeding IRC limits (e.g., 18-inch for 24-inch shakes, 13-inch for 18-inch shakes).
IRC R905.7.5
Spacing between shakes shall be 3/8 inch to 5/8 inch (9.5 mm to 15.9 mm) to allow for drainage and expansion.
IRC R905.7.5
Valleys shall be constructed as open valleys with a minimum 6-inch (152 mm) wide corrosion-resistant metal flashing.
IRC R905.7.6
Roof ventilation must conform to code requirements (e.g., 1:150 net free area) to prevent moisture accumulation and extend roof lifespan.
IRC R806.1
Any existing damage to roof sheathing, rafters, or structural components must be repaired or replaced prior to shake installation. Confirm structural integrity for snow loads relevant to DuPage County.
IRC R802.1, R907.1
Electrical System Integration
3 Rules
Maintain required clearances for electrical service masts and overhead conductors passing over or through the roof surface.
NEC 230.24, 230.28
Ensure all roof penetrations for electrical conduits, masts, or equipment are properly sealed and flashed to prevent water intrusion.
NEC 300.7(B), IRC R905.7.6
Any modification or repair to existing roof-mounted electrical equipment (e.g., attic fans, solar arrays, service masts) must comply with the 2023 NEC and require appropriate permitting and inspection.
NEC Article 690 (Solar PV Systems), General NEC requirements for alterations
Plumbing System Integration
3 Rules
All plumbing vent pipes penetrating the roof must be properly flashed and sealed to prevent leaks, utilizing approved flashing materials.
Illinois Plumbing Code Section 890.340 (q), IRC P3003.3
Maintain minimum required height for vent terminals above the roof surface, typically 6 inches (152 mm), and consider snow depth in DuPage County.
Illinois Plumbing Code Section 890.340 (h), IRC P3003.1
Ensure vent pipe insulation and sealing within unconditioned attic spaces meets energy code requirements to prevent condensation.
Illinois Plumbing Code 890.310 (b), IRC M1601.4.1
Safety & Work Practices
3 Rules
All personnel working at height must utilize appropriate fall protection equipment and adhere to OSHA safety standards.
OSHA 1926 Subpart M (referenced by local authorities for general safety)
Ensure safe access to the roof and proper ladder setup in accordance with safety guidelines.
OSHA 1926 Subpart X
Protect surrounding property, landscaping, and adjacent structures from falling debris and construction materials.
General Workmanship, IRC R104.1
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