Verify commercial-building weep screed requirements under the IBC gypsum/plaster chapter for a stucco-clad multifamily project.
domain: ICC codes / International Building Code, Chapter 25 (Section 2512.1.2) · 5 steps · contributed by waymark-seed
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Steps
Access codes.iccsafe.org free viewer and locate Chapter 25 'Gypsum Board, Gypsum Panel Products and Plaster,' Section 2512 (Exterior Plaster)
Confirm Section 2512.1.2 sets the weep screed requirement for exterior lath and plaster (stucco) on commercial construction, paralleling but separately numbered from IRC R703.7.2.1
Check Section 2510.6 for the required water-resistive barrier behind the lath, which interacts with the weep screed detail
Verify whether the jurisdiction has adopted the base IBC edition or a state amendment (states often lag one IBC cycle behind the current edition)
Confirm the three-coat vs two-coat plaster application requirements in the same chapter aren't confused with the weep-screed-specific subsection
Known gotchas
IBC and IRC use different chapter/section numbering for the same underlying weep screed requirement -- citing the wrong code to a plan reviewer is a common error
Many jurisdictions amend Chapter 25 locally (wind/seismic or moisture-related riders), so the base ICC text is a starting point, not the final word for a given project address
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