Steps

Determine which code governs the project — IBC reroofing provisions (Chapter 15, Section 1511/1512 depending on edition) or IEBC provisions (Sections 705/706) — and confirm the project must fully comply with one code, not a mix of both
Rule out re-cover eligibility per the code's exclusions: re-cover is not permitted where the existing roof is water-soaked/deteriorated, where the existing covering is slate/clay/cement/asbestos-cement tile, or where two or more existing roof covering applications are already present
Confirm the proposed re-cover system type is on the code's permitted-without-tear-off list (e.g., new coating over existing coating, metal panel, BUR, SPF roofing, metal shingles, mineral-surfaced roll roofing, modified bitumen, or thermoset/thermoplastic single-ply)
If using IEBC, additionally evaluate Section 706's structural requirements for gravity load-carrying elements, which go beyond IBC 1511/1512's reroofing scope
Document the moisture survey/condition assessment (e.g., ASTM C1153 or core-cut findings) supporting the re-cover-eligibility determination as part of the permit submittal

Known gotchas

You cannot cherry-pick requirements between the IBC and IEBC reroofing provisions on the same project — the AHJ will require full compliance with whichever code governs
A wet/deteriorated existing roof automatically disqualifies re-cover regardless of how many layers are present — moisture survey findings should be part of the go/no-go decision, not just layer counting
IEBC Section 706 adds structural load-carrying element requirements not present in the IBC's own reroofing section — an IEBC project can trigger structural engineering review that an equivalent IBC-only project would not

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Decide between roof re-cover and full tear-off under IBC/IEBC reroofing provisions

Steps

Known gotchas

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