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NTMA Technical Bulletins

February 13, 2024

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General Conditions

G-1 Covering a Defective Surface (#01)

G-2 Preparation Procedure for Fiber Concrete (#02-A)

G-3 Flatness Tolerance for Finished Terrazzo (#05)

G-4 Preparation of Concrete Slabs Treated with Curing Agents (#07)

G-5 Alignment of Terrazzo Dividers over Concrete Joints (#16)

G-6 Abrasive Aggregate Non-Slip lines for Ramps and Stairs (#21)

G-7 Aggregate Characteristics (#22)

G-8 Procedure for Patching Terrazzo Step Nosing (#23)

G-9 Pinholes in a Terrazzo Finish (#30)

G-10 Discoloration of Metal Divider Strips (#33)

G-11 Decorative Metal Inserts in Terrazzo (#33–B)

G-12 Grinding and Polishing Heavy Top Strips (#34)

G-13 Stainless Steel Metal Divider Strips (#34-A)

G-14 Installation of a Terrazzo Floor without Adequate Roof Protection (#35)

G-15 Marble Chip Selection (#42)

G-16 Black Terrazzo (#46-A)

G-17 Color of Terrazzo

G-18 Non-Slip Safety Line Treatment for Terrazzo (#52)

G-19 Re-anchoring a Terrazzo Floor System (#53)

G-20 Thermal Systems under a Terrazzo Floor System (#66)

G-21 Oil Stains on Terrazzo Floors (#80)

G-22 Curing Agents (#81)

G-23 Self-leveling Underlayments (#99)

G-24 Marble Dust Residue (#103)

G-25 Purpose of Divider Strips in Terrazzo Floors (#110)

G-26 Affixing Divider Strips (#114)

G-27 Removal of Swirl Marks on New Terrazzo

G-28 Finish of Terrazzo

G-29 Divider Strips

G-30 Aggregate Concentration

G-31 Underlayment to Flatten Substrate for Terrazzo

G-32 Aftermarket Finishes

G-33 Caveats on Monochromatic Colored Terrazzo

G-34 Reflective Finishes in Terrazzo

G-35 Code Requirements for Stair Treads

Standard Terrazzo

S-1 Sub-Surface Compaction (#09)

S-2 Color Variation in Cement Terrazzo (#44)

S-3 Ashlar Strip Pattern in Sand Cushion Cement Terrazzo (#10)

S-4 Sand Cushion Terrazzo (12)

S-5 Poured Cement Terrazzo with a Precast Look (#14)

S-6 Control Joints in Sand Cushion Terrazzo (#15)

S-7 Cement Terrazzo Systems Using Fine Aggregate (#16-B)

S-8 Divider Strips for Thin-Set Cement Terrazzo Systems

S-9 Initial Appearance of New Cement Terrazzo Floors (#18)

S-10 Compressive Strength for Cement Under-bed & Topping (#19)

S-11 Color Pigments in Cement Terrazzo (#20)

S-12 Substrate for Bonded Cement Terrazzo (#25)

S-13 Monolithic Terrazzo over Metal Deck Construction (#28)

S-14 Monolithic Cement Terrazzo System (#29)

S-15 Filling Pinholes in a Cement Terrazzo Floor after the Sealer Has Been Applied (#31)

S-16 Crack Detailing & Joint Treatment for Monolithic Terrazzo

S-17 Cleaning Cement Terrazzo (#41)

S-18 Cement Color and Shade Variations (#42-C)

S-19 Mottled Appearance of a Cement Terrazzo Floor (#46)

S-20 Treatment of Cracks (#54)

S-21 Crazing of Cement Terrazzo (#54-A)

S-22 Procedure for Patching Cement Terrazzo (#55)

S-23 Restoration of Terrazzo Floor & Base (#56, 56-C)

S-24 Glass & Plastic Aggregate in Cement Terrazzo

S-25 Linseed Oil Applied to Cement Terrazzo Surfaces (#58)

S-26 Protection of Sand Cushion Cement Terrazzo (#70)

S-27 Pan-Type Terrazzo Treads (#71)

S-28 Creating Accent Panels in and Existing Cement Terrazzo Floor (#72)

S-29 Temperature Requirements for Installation of Cement Terrazzo (#82)

S-30 Grinding Cement Terrazzo Systems (#83)

S-31 Fixed Projections in Sand Cushion Terrazzo (#86)

S-32 Shade Variations in Cement Terrazzo Floor and Base (#89)

S-33 Cement Terrazzo Topping Placed on Under-bed (#108)

S-34 Concrete Mix for Structural Terrazzo (#132)

S-35 Divider Strips in Direct Bond Systems

Epoxy Terrazzo

Rustic Terrazzo