Design Strategies for Metal Wall and Roof Systems

Years ago, prefabricated metal panel wall and roof systems did not find wide acceptance in high-end commercial applications. While these systems were cost-effective, aesthetic perceptions relegated them to large storage buildings, manufacturing facilities, and big box stores. However, versatility, reliable performance, and relatively low installed-costs have now made these systems attractive in more sophisticated applications. Today, owners and architects often collaborate to use these products in distinctive and aesthetically innovative design solutions. Manufacturers, recognizing an opportunity, have expanded their product lines with the aim of amplifying product use across a range of building types. Of course, no building enclosure system is without design challenges and considerations.

LEARNING OBJECTIVES

After studying this article, you should be able to:

• Describe the materials and finishes typical of metal wall and roof assemblies, including the benefits and shortcomings of each, and the applications to which they are best suited.
• Distinguish between “open” and “closed” metal wall systems, defining each in terms of its waterproofing strategy, as well as its compatibility with exposed or concealed fastener designs.
• Contrast “hydrokinetic” and “hydrostatic” metal roof assemblies and explain the relationship between these water protection approaches and architectural or structural metal roof systems.
• Explain how best to address design considerations, such as expansion, differential movement, structural integrity, weather protection, thermal performance, and condensation, for typical metal wall and roof assemblies.