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No, ceilings do not have to be 5/8-inch drywall. The thickness of drywall used for ceilings depends on various factors, including building codes, structural requirements, and personal preferences.

The two most common thicknesses for drywall used in residential construction are 1/2 inch and 5/8 inch. Here's a general overview of when each thickness might be used:

  1. 1/2-Inch Drywall: This thickness is commonly used for ceilings in residential construction. It is lighter and easier to handle, making installation more manageable. If the ceiling joists are spaced 16 inches apart (standard in most homes), 1/2-inch drywall is usually sufficient.

  2. 5/8-Inch Drywall: This thicker drywall is often used for ceilings in commercial buildings or in areas where extra fire resistance or soundproofing is desired. Some building codes may require 5/8-inch drywall on ceilings for specific applications, such as multi-story buildings or attached garages.

Building codes and local regulations may dictate the required drywall thickness for ceilings in certain situations. Always check with your local building authority to ensure compliance with relevant codes and standards.

When choosing the thickness of drywall for your ceiling, consider factors like joist spacing, fire ratings, and any specific requirements for your area. If you're unsure, it's a good idea to consult with a professional contractor or builder who can help you make the right decision based on your specific project.

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