Casing

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Casing

What is Casing?

Casing, Decorative trim that surrounds doors, windows, and openings to cover gaps and provide finished appearance

Description

Casing is decorative trim molding installed around doors, windows, and other openings to cover gaps between the frame and wall surface while providing a finished, professional appearance. This essential finish carpentry element serves both functional and aesthetic purposes, concealing construction joints and irregularities while adding architectural character and visual appeal to interior and exterior openings.

Purpose includes covering construction gaps, providing finished appearance, adding architectural detail, and protecting edges from damage. Quality casing installation is essential for professional-looking finish work and long-term durability.

Types include door casing for door frames, window casing for window openings, archway casing for curved openings, and specialty casing for unique applications. Each type requires specific installation techniques and considerations.

FAQs

  • What’s the standard width for door and window casing?

    Typically 2-1/4 in to 3-1/2 in wide, though widths can range from 1-1/2 in to 6 in depending on design and opening size.

  • Should casing match other trim in the room?

    Generally yes, as consistent trim creates a unified appearance, though contrasting casing can be used as a design feature.

  • How do you cut casing for mitered corners?

    Using a miter saw set to 45 degrees with accurate measurements and square cuts for tight-fitting joints.

  • Can casing be installed over drywall?

    Yes, casing is typically installed over finished drywall, provided there is adequate backing for secure fastening.

  • What’s the difference between door and window casing?

    They often use the same profile, but window casing may include sill and apron components not used with doors.

  • How do you repair damaged casing?

    Minor damage can be filled and refinished, while major damage may require replacement of affected sections.

  • Can casing be painted after installation?

    Yes, though pre-finishing before installation often produces better results and simplifies application.

Fun Fact

Fun Fact: The term “casing” comes from the word “case,” reflecting its function of encasing or framing openings, similar to how a case contains its contents.

CSI Code

06 20 00

NAHB Code

620