Tile-Quarry (Unglazed) Manufacturers' offer technical support and/or product sheets that can answer your questions regarding performance or application of proprietary products.
Florida Tile, Inc. Phone: (863) 687-7171
If your question is still unresolved, you have several choices to explore other means of technical support.
Situation May Require an On-Site Inspection to resolve the problem.
Installation May Require Sample Testing
Questions Regarding Handbook Guidelines or American National Standards