Tile & Grout Details
Standard: 2-5mm
At least 2/3 tile thickness
10% recommended
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CACalifornia Building Code (Title 24)
References & Sources
Standards Cited
- ANSI A108/A118 — American National Standards for Installation of Ceramic Tile
Defines grout joint widths and application methods for various tile types - TCNA Handbook — Tile Council of North America — Handbook for Ceramic, Glass, and Stone Tile Installation
Industry standard for grout selection, joint widths, and coverage rates
Formulas Used
- Grout line length per m²:
groutLength = (tileLength + tileWidth) / (tileLength × tileWidth)
Source: Tile geometry — All dimensions in metres. Accounts for shared grout lines between adjacent tiles. - Grout volume per m²:
groutVolume = groutLineLengthPerM2 × groutWidth × groutDepth
Source: ANSI A108/A118 / TCNA Handbook - Grout weight:
groutKg = groutVolumeLitres × coverageKgPerLitre
Source: Manufacturer coverage rates
Key Assumptions
- Grout density approximately 1.6 kg per litre (unsanded) — Manufacturer data (Bostik, Custom, Prism)
- Standard grout joint width 3mm (1/8") for rectified tiles, 5mm (3/16") for natural-edge tiles — TCNA Handbook