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EP1: How to use Type X and Type C gypsum board in UL assemblies

NGConnects by National Gypsum Company

Release Date: 01/17/2025

What is the difference between Type X and Type C gypsum board and when should you use each? Chris Whitmire, director of product marketing at National Gypsum Company, sits down with Mark Chapman, senior manager of the 1-800-NATIONAL® Construction Services team, to discuss the nuances between these types of gypsum board and how to best use them in fire-rated assemblies. 

Listeners will learn:

  • How Type X gypsum board is defined by ASTM C1396, Standard Specification for Gypsum Board, for ½", ⅝" and 1" thicknesses and how each relates to hour ratings 
  • What Type C gypsum board is
  • How to use Type C gypsum board to reduce the layers of standard Type X in floor-ceiling assemblies
  • How Type X and Type C products are specified in fire-rated assemblies
  • Whether these boards are interchangeable

Want to know more?

 

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Watch this episode on the National Gypsum YouTube channel.

https://www.youtube.com/nationalgypsum

 

Do you have a question you’d like us to answer or a topic we should cover? We want to hear from you. Email your ideas to [email protected].

 

Find all NGConnects podcasts at nationalgypsum.com/podcasts.

 

About

 

National Gypsum Company is the exclusive service provider of reliable, high-performance building products manufactured by its affiliate companies and marketed under the Gold Bond®, ProForm® and PermaBASE® brands.

 

The National Gypsum name has been synonymous with high-quality, innovative products and exceptional customer service since 1925.

 

The information provided in this podcast is for general information purposes only. For specific building or design questions, please consult with the 1-800-NATIONAL® Construction Services team or your regional National Gypsum construction design manager. Always use products according to the manufacturer’s recommendations.