Curtain Wall

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Curtain Wall

What is Curtain Wall?

Curtain Wall, A non-structural exterior wall system that hangs from the building structure to provide weather protection and aesthetics

Description

Curtain wall is a non-structural exterior wall system that hangs from or is supported by the building’s structural frame to provide weather protection, thermal performance, and architectural aesthetics without carrying structural loads. These sophisticated building envelope systems enable large expanses of glass and other materials while maintaining structural efficiency and design flexibility in commercial and institutional construction.

Purpose includes providing weather protection, enabling architectural expression, maximizing natural light, and optimizing structural efficiency. Quality curtain wall design and installation are essential for building performance, occupant comfort, and energy efficiency.

Types include stick-built systems for field assembly, unitized systems for factory fabrication, structural glazing for seamless appearance, and specialty systems for unique requirements. Each type offers different installation methods and performance characteristics.

FAQs

  • What’s the difference between curtain wall and storefront?

    Curtain walls span multiple floors and hang from the building structure, while storefront systems are typically single-story and sit on the structure.

  • How long do curtain walls last?

    Curtain wall systems generally last 25–40 years with proper maintenance, though glazing and sealants may require replacement sooner.

  • Can curtain walls be energy efficient?

    Yes, when designed with high-performance glazing, thermal breaks, and insulated framing, modern curtain walls can achieve excellent energy efficiency.

  • What causes curtain wall leaks?

    Leaks are commonly caused by sealant failure, installation defects, or inadequate drainage and pressure equalization.

  • How are curtain walls attached to buildings?

    Curtain walls are secured using engineered anchors and connections designed to accommodate structural loads and building movement.

  • Can curtain walls be repaired?

    Yes, most systems allow for repair or replacement of individual components, depending on access and system configuration.

  • Do curtain walls require special maintenance?

    Regular inspections, cleaning, and periodic sealant replacement are required to maintain performance and prevent water intrusion.

Fun Fact

Fun Fact: The first modern curtain wall was installed on the Hallidie Building in San Francisco in 1918, pioneering the concept of non-structural exterior walls that revolutionized building design.

CSI Code

08 44 00

NAHB Code

860