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IIBEC recommends a reglet roughly 1 inch minimum, with 1½ inches preferred
Data as of Oct 5, 2026
Reviewed by Dimitry Apollonsky ·
International Institute of Building Enclosure Consultants (IIBEC) is a professional association that supports and certifies building enclosure professionals in roofing, waterproofing, and exterior wall systems, offering credentials such as RRC, RRO, RWC, REWC, REWO, RBEC, and CBECxP through its Certification Council. It provides education and professional development through online courses, webinars, events, and publications like IIBEC Interface and a technical library. Through global chapters, mentoring programs, member services, advocacy, and an annual convention, it fosters standards and collaboration in the building enclosure industry.
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IIBEC recommends a reglet roughly 1 inch minimum, with 1½ inches preferred
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