Room & Tile Details
Standard: 2-3mm
10% recommended for straight lay
Results
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NAIBC / IRC codes
References & Sources
Standards Cited
- ANSI A108/A118/A136 — ANSI Standards for Installation of Ceramic Tile
Defines standard tile installation methods, including layout, spacing, and wastage considerations for North American construction - TCNA Handbook — Tile Council of North America — Handbook for Ceramic, Glass, and Stone Tile Installation
Industry-standard reference for tile sizing, coverage rates, and installation best practices in North America
Formulas Used
- Effective Tile Area:
tileArea = ((tileLength + gap) / 1000) x ((tileWidth + gap) / 1000)
Source: ANSI A108 / TCNA Handbook — Grout gap is added to each tile dimension to account for joint width - Tiles per m²:
tilesPerM2 = 1 / effectiveTileArea
Source: Industry standard calculation - Total Tiles with Pattern and Wastage:
total = ceil(baseTiles x max(wastageMultiplier, patternMultiplier))
Source: Industry standard practice — The higher of user wastage or pattern wastage is applied (not both). Pattern multipliers: straight 1.0, diagonal 1.15, herringbone 1.20
Key Assumptions
- Diagonal tile laying adds 15% extra wastage for angled cuts — TCNA Handbook / manufacturer guidance
- Herringbone pattern adds 20% extra wastage for complex cuts — TCNA Handbook / manufacturer guidance
- Standard box contains 6 tiles (user should verify with actual product) — Common US manufacturer packaging
- Default 10% wastage for cuts and breakages on straight lay — TCNA Handbook recommended practice
- Common US tile sizes include 12"x12", 12"x24", 6"x24" (plank), and 18"x18" — TCNA Handbook / manufacturer standard sizes