The original pages containing letter found in the NTCA Reference Manual are here.  They can be downloaded and used as needed for your projects. 

• Commercial Notification of Non-Conforming Tile and Installation: Warranty Implications – page 20
• Commercial RFI Example – page 21
• Existing Balcony Tile Installation – page 248
• Floor Flatness Requirements – Request for Information – page 57
• Glass Enclosure and Waterproofed Systems – page 264
• Glass Tile – page 142
• Grouting with 100% Solids Epoxy – page 308
• Movement Joints – page 28
• Penetrations in Completed Waterproofed Tile Assemblies Precautionary – page 267
• Proper Preparation and ANSI Requirements form Thin-Set Method – page 47
• Recessed Glass in Tile Precautionary – Page 266
• Residential Notification of Non-Conforming Tile and Installation: Warranty Implications – page 18
• Temporary Protection for Tile Surfaces (A108.02-3.1.5 and 3.1.6) – page 16
• Testing for Curing Compounds – page 63
• Tile Over Poured -Gypsum Underlayments and Leveling Materials – page 93
• Tile Over Steel Stud Assembly – page 77
• Tile Over Wood Sub-Floors – page 75
• Underlayment Cracks and Their Treatment – Sample Letter for the Tile Contractor – page 98
• Use of Porcelain Tile – Page 323
• Wood Window Precautionary – page 265