Join Us in St. Louis for a live, interactive experience convening the best experts in building enclosure industry.

Join IIBEC for the 2025 Building Enclosure Symposium (BES), taking place October 26–28, 2025, at the historic St. Louis Union Station Hotel. This in-person event brings together top minds in the building enclosure industry for two days of expert-led education, discussion, and networking.

Connect with 300+ consultants, architects, engineers, design professionals, and specialists in roofing, waterproofing, fenestration, cladding, and exterior wall systems. Share insights and stay ahead of industry trends.

Why Attend?

Expert Speakers

Learn cutting-edge, relevant solutions for design, construction, below-grade waterproofing, restoration, sustainability, and building enclosure commissioning through 20 concurrent and 2 general sessions.

Networking Opportunities

Connect with over 30 manufacturers of roofing, waterproofing, and exterior wall products in the exhibit hall. Networking receptions will also allow you to reacquaint with old colleagues and make new, meaningful connections. These receptions are the perfect opportunity to expand your network and find new ways to get involved.

• Sunday, October 26: Otter-ly Fin-tastic Welcome Reception, 6:00 p.m.–7:00 p.m.; Sponsored by Carlisle Architectural Metals.

• Monday, October 27: Reception with Exhibitors, 5:30 p.m.–6:30 p.m.; Sponsored by Johns Manville.

• Monday, October 27: IIBEC Central States Branch Social Networking Event, 6:30 p.m.; This is a separate fee and not included with the 2025 IIBEC BES registration fee. Click here to register.