Terrazzo Installation Guide

Substrate Preparation

Substrate preparation is the most critical phase. The substrate must be structurally sound, flat within 1/4 inch in 10 feet, and free of oil, dust, curing compounds, and existing coatings. Minimum concrete compressive strength: 3,500 psi.

Divider Strip Layout

Divider strips serve both structural and aesthetic functions – controlling cracking and defining pattern areas. Common materials include white brass, zinc, aluminum, and plastic. Panel sizes should not exceed 36 square feet for cement systems.

Epoxy Terrazzo Installation Steps

1. Prime substrate – Apply epoxy primer to prepared concrete slab
2. Install divider strips – Set strips to approved layout drawings
3. Apply epoxy matrix – Pour and trowel to 3/8 to 1/2 inch thickness
4. Seed aggregate – Broadcast chips into wet matrix and roll to embed
5. Cure – Allow 24 to 48 hours before grinding
6. Rough grind – 16 to 30 grit to expose aggregate
7. Fill voids – Apply grout coat to fill pinholes
8. Medium grind – 50 to 80 grit to level and refine
9. Fine grind and polish – 120 to 1500 grit to desired finish
10. Seal – Apply sealer appropriate for traffic level

Maintenance

• Daily – Damp mop with pH-neutral cleaner. Avoid acidic cleaners.
• Periodic – Machine scrubbing and reapplication of sealer as needed.
• Annual – Professional burnishing in high-traffic areas.
• Long-term – Major restoration grinding every 20 to 30 years restores original appearance.