Manufacturing glazing systems in the North American Markets. Allan Windows Group and Global Architectural Metals Group, two dominant forces in the design, manufacture and installation of commercial-grade glazing, cladding, railing and entry systems, have merged all of their respective operations under one name brand. The two groups, both enduring names in the North American architecture, design and construction markets, have set the standard for quality, design innovation and performance for over 60 years. The company will operate under the unifying brand-name BVGlazing Systems, effective immediately.