01
Confirm the authority and scope
Ask the local jurisdiction which permits, drawings and inspections apply to repair, reroofing, structural changes or new construction. Do not rely on requirements from another city or state.
02
Coordinate loads and performance
Structure, wind zones, snow loads, fire classification, underlayment, ventilation and fastening can affect design. Product reports do not replace project-specific code review.
03
Add historic approvals when required
Landmarks commissions, grant programs or tax-credit reviews may control visible material, details and documentation. Obtain approvals before removing historic slate.