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Substrates/Applications that Require Design Consideration

THE FOLLOWING ARE EXAMPLES OF SUBSTRATES/APPLICATION TYPES THAT REQUIRE SPECIFIC DESIGN CONSIDERATIONS:

Exterior installations over steel or wood framing • Suitable backer board • Exterior rated sheathing and cement backer board • Lath and plaster systems

Steam room applications over steel framing • Suitable backer board • Lath and plaster systems • Thin tile installation over existing tile

INSTALLATIONS MADE OVER THE ABOVE CONSTRUCT TYPES (NOT LIMITED TO) THE FOLLOWING DESIGN CONSIDERATIONS:

• Framing deflection criteria • Framing gauge – 20 gauge (0.039”) (0.033”) (0.84 mm) or heavier • Frame spacing • Frame depth • Wind loads • Creep • Air barrier requirement/Placement/Location • Water resistive barrier requirement/Placement/Location • Insulation requirement/Placement/Location • Exterior rated sheathing requirement/Placement • Cement backer board/Exterior rated sheathing board edge bracing • Lateral bracing for framing

• Purling • Battens • Fastener pattern • Fastener type (Non-corrosive and non-oxidizing

• Taping of board seams with appropriate latex fortified Portland cement based mortar • Use of appropriate exterior rated alkali resistant fiber mesh tape (4-in. [102 mm] width)

• Use of appropriate cement backer board type for application • Use of appropriate wire lath type/Gauge for application • Use/selection of appropriate latex fortified Portland cement based scratch and brown coat materials • Waterproofing and/or vapor retarding membrane requirement/Detailing/Sequencing/Integration with other building elements • Flashing requirements/sequencing/Detailing/Integration with other building elements • Compliance with International Building Code/International Residential Code (applicable version) requirements • Suitability of finish material for the application • Suitability of installation materials for the application • Dew point control • Design/Placement/Construct of movement joints • Consideration for particular climatic conditions and exposure NOTE: The above items are design related and must be considered by the Project Design Professional when designing and specifying the ceramic tile and stone installation system in these applications. Consult ceramic tile and stone installation manufacturers for their recommendations.

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NTCA Reference Manual | 2024 / 2025

Chapter 2 | Substrates