Cementitious Sheathing


Specification Details

8.5" x 11"
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Use this 3 part SimpleSpecs™ specification template to specify exterior cementitious panel sheathing for use behind masonry, EIFS, siding, and plaster.

Cementitious Sheathing vs. Gypsum Sheathing

When it comes to selecting the right sheathing material for your exterior walls, there are several options available, including cementitious and gypsum sheathing. The differences between the two and help you determine which one is the best fit for your project.

Cementitious Sheathing

Is a durable and moisture-resistant option for exterior wall sheathing. Made from a combination of cement, water, and mineral fibers, it’s known for strength, fire resistance, and resistance to mold and moisture.

The benefits include:

  • Resistant to moisture and mold growth
  • Provides excellent fire resistance
  • Highly durable and long-lasting
  • Can be used in a variety of weather conditions and climates

Gypsum Sheathing

Exterior wall gypsum sheathing is a lightweight and cost-effective option for exterior wall sheathing. Made from a gypsum core and covered with a water-resistant paper facing, gypsum sheathing is known for its ease of installation and affordability.

The benefits include:

  • Lightweight and easy to install
  • Cost-effective option for exterior wall sheathing
  • Provides good insulation properties

How do they compare?

While both cementitious and gypsum sheathing have their advantages, there are some key differences to consider when selecting the right option for your project. Here are some of the key factors to keep in mind:

Moisture Resistance: Cementitious sheathing is more moisture-resistant than gypsum sheathing, making it a better choice for wet or humid climates.

Fire Resistance: Cementitious sheathing is more fire-resistant than gypsum sheathing, making it a better choice for areas with high fire risk.

Durability: Cementitious sheathing is generally more durable and long-lasting than gypsum sheathing, which may require more frequent replacement over time.

Cost: Gypsum sheathing is more affordable than cementitious sheathing, making it a better choice for projects with budget constraints.

Ultimately, the decision will depend on your specific project requirements, budget, and climate conditions. Consult with a building professional to determine the best option for your project.


A weather barrier/ moisture barrier is required to prevent moisture infiltration of the structures interior.

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