Guide Specification — Terrazzino Micro-Terrazzo Floor System

Section includes a self-leveling, seamless, decorative Terrazzino Micro-Terrazzo floor system comprising a moisture vapor barrier or primer, pigmented epoxy base coat, decorative self-leveling micro-terrazzo layer, and a urethane or wax polymer finish coat, installed over prepared concrete substrates.

Related sections:

• Section 03 30 00 — Cast-in-Place Concrete, for the substrate on which this system is installed.
• Section 03 35 00 — Concrete Finishing, for substrate flatness/levelness tolerances.
• Section 07 92 00 — Joint Sealants, for sealant at moving joints within the resinous floor area.

The following standards are referenced in this Section and apply to the edition in effect as of the date of the Contract Documents.

• Product Data: Manufacturer's technical data sheets for each component of the system (moisture vapor barrier or primer, base coat, micro-terrazzo layer, topcoat or wax finish).
• Safety Data Sheets (SDS) for each component.
• Samples: Color chart showing all available blends; physical sample board of each selected blend, minimum [sample board size].
• Guide/project specification and short-form specification text, as issued by the manufacturer.
• Installer qualifications, as described in Quality Assurance below.
• Warranty: Sample warranty form. [warranty terms]
• Maintenance data: Manufacturer's care and maintenance instructions for Contract Closeout submittals.

Installer qualifications: [installer qualification / certification requirements]

Mock-up: Before proceeding with the Work, install a mock-up panel of not less than [mock-up panel size] showing the full system build-up (substrate preparation, moisture vapor barrier or primer, base coat, micro-terrazzo layer at target thickness, and specified finish coat) in the selected blend, for review and approval by the Architect of color, blend, texture, and gloss. Approved mock-up establishes the standard for the Work and may remain as part of the completed Work if approved.

• Deliver materials in original, unopened containers with manufacturer's labels intact, identifying product name, batch/lot, and shelf life.
• Shelf life: 1 year in unopened containers, stored at normal room temperature.
• Store all system components at 65–85°F for at least 48 hours immediately before use.
• Do not store materials where exposed to freezing, direct sun, or ambient temperatures outside the manufacturer's stated range.
• Handle Part A and Part B components to avoid cross-contamination; keep containers closed when not in use.

• Ambient and substrate temperature: 50–90°F during application and until full cure.
• Relative humidity: below 85% during application. When relative humidity exceeds 70%, allow the mixed material to induct for 15 minutes before applying; remix before use.
• Substrate (dew point): maintain substrate temperature at least 5°F above the measured dew point throughout application and initial cure.
• Do not apply over substrates subject to hydrostatic or osmotic moisture conditions, or over gypsum-based or lightweight concrete substrates.

[manufacturer and/or installer warranty terms, duration, and coverage]

Basis of Design: Terrazzino Micro-Terrazzo Floor System. Contact: [manufacturer contact information].

Substitutions: [substitution policy]

Provide the following components, as manufactured for the Terrazzino system:

• Moisture vapor barrier: Terrazzino Moisture Vapor Control — required on all slab-on-grade work and any application directly over concrete.
• Primer (alternative to the moisture vapor barrier, eligible non-porous substrates only): Terrazzino Fast Set Primer. Not a moisture vapor barrier.
• Base coat: Terrazzino High Build Epoxy — 100% solids pigmented epoxy, color-matched to the selected blend.
• Decorative layer: Terrazzino Micro-Terrazzo — self-leveling, two-component, 100% solids clear epoxy binder combined with Terrazzino aggregate blend.
• Finish coat (select one): Terrazzino Urethane Topcoat (low-gloss or high-gloss) for wear, chemical, and UV protection; or Terrazzino Cera wax finish for owner-maintained floors that will be periodically buffed and rewaxed.
• Crack and pinhole repair material: crack paste / pinhole filler compatible with the system.

The decorative layer shall meet or exceed the following published physical properties. Blank/Data-pending rows have not been published by the manufacturer and must be confirmed before use as acceptance criteria.

Available Terrazzino aggregate blends:

• North Sea
• Hierro
• Contrast
• Classic
• Desert
• Galaxy
• Cinnamon
• Sesame

Colors are shown as close as possible given screen and print limitations; colors may vary from batch to batch. Request a physical sample board for final color selection.

Examine substrates and conditions, with Installer present, for compliance with requirements for maximum moisture content and other conditions affecting performance. Proceed with installation only after unsatisfactory conditions have been corrected.

• Test for moisture vapor emission rate (MVER) per ASTM F1869 (calcium chloride): maximum 20 lb/24 h/1,000 sq ft. Perform this test only where HVAC has operated continuously for at least one week before and during testing.
• Or test in-situ relative humidity per ASTM F2170: 75%–95% RH acceptable for the moisture vapor barrier.
• Perform a minimum of one test of each type per 1,000 sq ft of floor area.
• Do not proceed with installation until moisture test results are within the limits above and have been reviewed by the Installer.

• Diamond grind the substrate to a minimum surface profile of CSP 3 (ICRI) — grind as flat as possible.
• Vacuum thoroughly to remove all grinding dust before proceeding.
• Protect adjacent surfaces, equipment, and finishes not scheduled to receive the floor system.

• Non-moving cracks and surface voids: grind open, fill with crack paste / pinhole filler slightly proud of the surrounding surface, then grind flush — “filled, flush, and flat.”
• Moving (structural) joints and saw-cut control joints: [joint treatment detail — sealant product, joint width, and whether the resinous system is run through or terminated at the joint]
• Do not bridge known moving joints with the resinous system without a detailed joint treatment reviewed by the Architect.

Mix and apply each component per the manufacturer's current technical data sheet and the schedule below. Mix only the quantity that can be placed within pot life.

1. Apply moisture vapor barrier (or primer, where permitted) in two coats with a notched squeegee; prime twice to reduce pinholing in later layers.
2. Inspect base coat for pinholes and fill before proceeding; sand with 60–80 grit and vacuum before placing the decorative layer.
3. Spread the mixed Terrazzino micro-terrazzo material at 60 mils with a 50–60 mil notched squeegee or a wire gauge rake set to 1/20 in.–1/16 in. A 3/8 in. V-notch squeegee applies too little material for this layer and shall not be used.
4. Allow the micro-terrazzo layer to settle 5–10 minutes, then loop-roll with an 18 in. looped roller to level the surface and remove tool marks.
5. Order a minimum of 10% additional material beyond the calculated quantity to avoid running short mid-pour.
6. Before applying a urethane topcoat, sand the cured micro-terrazzo layer with a 100–200 grit screen and vacuum.
7. Where Terrazzino Cera is specified instead of a urethane topcoat, apply without sanding (3–4 coats, buffed between coats) or after sanding 100 then 200 grit (5–6 coats, buffed between coats); this route cannot be sanded flat after application, so correct any unlevel areas in the micro-terrazzo layer before finishing.

Do not permit foot traffic, equipment, or furnishings on the floor until the applicable cure stage above has elapsed.

• Verify ambient and substrate conditions meet Section 1.6 Field Conditions before and during each application step.
• Inspect each coat for pinholes, bubbles, and foreign debris before proceeding to the next layer; repair before recoating.
• Test unfamiliar notched-squeegee or rake equipment on a scrap area to confirm actual yield before use on the floor.
• Verify cured micro-terrazzo thickness and finish coat application against the schedule in Section 3.5.

Protect completed floor system from traffic, construction debris, and other trades until full cure has elapsed per Section 3.6. Barricade and post signage as required to prevent access during cure.

Remove masking, protective coverings, and construction debris from the finished floor. Clean per the manufacturer's maintenance guidance before Owner occupancy; avoid solvents or abrasive methods not approved by the manufacturer.