Joint Cover

Back to Glossary

Joint Cover

What is Joint Cover?

A protective or decorative element used to cover and seal joints between building materials, including expansion joints, construction joints, and control joints, providing weather protection, aesthetic continuity, and structural accommodation for building movement in various construction applications.

Description

A joint cover is a protective or decorative element used to cover and seal joints between building materials, including expansion joints, construction joints, and control joints, providing weather protection, aesthetic continuity, and structural accommodation for building movement in various construction applications. These essential building components bridge gaps between adjacent materials while allowing for thermal expansion, structural settlement, and seismic movement. Joint covers are critical elements in maintaining building envelope integrity and architectural appearance while accommodating the natural movement of building systems.

The primary purposes include protecting joints from weather infiltration, providing aesthetic continuity across building surfaces, accommodating thermal and structural movement, preventing debris accumulation in joints, maintaining building envelope integrity, ensuring pedestrian safety over floor joints, and meeting architectural design requirements.

Types and applications encompass exterior wall joint covers, roofing joint covers, floor joint covers, ceiling joint covers, curtain wall joint covers, and specialty covers for unique applications.

FAQs

  • What is a joint cover?

    A joint cover is a protective or decorative element used to cover and seal joints between building materials, providing weather protection, aesthetic continuity, and structural accommodation for building movement.

  • Where are joint covers typically used?

    Joint covers are used on exterior walls, roofing systems, floors, ceilings, curtain walls, and anywhere joints between building materials need protection and aesthetic treatment.

  • What materials are joint covers made from?

    Common materials include metal (aluminum, stainless steel), elastomeric systems (rubber, neoprene), composite materials, and sealant-based systems, selected based on application requirements.

  • How do joint covers accommodate building movement?

    Joint covers are designed with flexible elements, sliding mechanisms, or compressible materials that allow for thermal expansion, structural settlement, and seismic movement while maintaining weather protection.

  • How are joint covers installed?

    Installation involves surface preparation, proper sizing and fitting, secure attachment using mechanical fasteners or adhesives, sealant application, and quality verification.

  • What maintenance do joint covers require?

    Maintenance includes regular inspection, cleaning, sealant renewal, minor repairs, and component replacement as needed to maintain performance and appearance.

  • Are joint covers required by building codes?

    While not always specifically required, joint covers help meet building code requirements for weather resistance, structural performance, and safety, particularly in commercial construction.

Fun Fact

Fun Fact: The first architectural joint covers were developed in the 1920s for large commercial buildings as architects realized that visible expansion joints detracted from building aesthetics! Modern joint covers can accommodate movement of several inches while maintaining complete weather sealing. Some advanced joint cover systems include built-in drainage and can handle multi-directional movement simultaneously. Interestingly, the largest joint covers in the world are found on major bridges and can span gaps of several feet while accommodating massive structural movements!

CSI Code

07 95 00

NAHB Code

970