| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. ADHESIVE APPLICATION & COVERAGE | |||
| A1 | Adhesive application method (notched trowel, correct angle and pressure) Acceptance: Notched trowel (6-10 mm) at 45°, continuous coverage >90% of tile back | Cl. 5 — Proper adhesive application technique | OK NC NA HOLD |
| A2 | Adhesive coverage on tile back (minimum 90% contact) Acceptance: Adhesive coverage ≥90% verified by random bond strength tests | Cl. 5.1 — Full adhesive contact to prevent hollow areas | OK NC NA HOLD |
| A3 | Adhesive freshness and consistency during application Acceptance: Adhesive mixed fresh, no skinning, consistent workability | Cl. 5.2 — Use adhesive within pot life | OK NC NA HOLD |
| A4 | Adhesive thickness (typically 3-5 mm after pressing tile) Acceptance: Adhesive bed 3-5 mm thick, uniform across tile surface | Cl. 5.3 — Adequate bed thickness for load distribution | OK NC NA HOLD |
| B. TILE PLACEMENT & LEVELING | |||
| B1 | Tile alignment and straightness (using straightedge/level) Acceptance: Variation ≤2 mm in 1 m length, no lippage between adjacent tiles | Cl. 6 — Tiles must be level and aligned | OK NC NA HOLD |
| B2 | Joint spacing consistency (uniform gaps between tiles) Acceptance: Joint width variation ±1 mm from nominal, spacers used | Cl. 6.1 — Regular joint widths for aesthetic and structural integrity | OK NC NA HOLD |
| B3 | Tile pressing and embedding (adequate pressure application) Acceptance: Tiles pressed by hand/beater until adhesive squeezes at joints | Cl. 6.2 — Tiles must be firmly embedded without air gaps | OK NC NA HOLD |
| B4 | Vertical levels and slopes (if sloped floor design) Acceptance: Slope ±1:100 from design, verified with level and straightedge | Cl. 6.3 — Maintain design slope for drainage | OK NC NA HOLD |
| B5 | Edge and boundary treatments (cut tiles, trim pieces) Acceptance: Cut edges smooth, no chipping >2 mm, boundary sealed properly | Cl. 7 — Neat edges and proper perimeter finishing | OK NC NA HOLD |
| C. TILE QUALITY & CONDITION | |||
| C1 | Visual inspection for cracks, chips, and defects in tiles Acceptance: No visible cracks, chips >2 mm, or manufacturing defects | Cl. 3 — Defective tiles shall not be laid | OK NC NA HOLD |
| C2 | Color and finish matching across batch (no apparent shade variation) Acceptance: Color variation within acceptable range per approved sample | Cl. 3.1 — Consistent appearance across tiles | OK NC NA HOLD |
| C3 | Tile dimensions and sizing (verify against specification) Acceptance: Dimensions ±1% or per IS code, measured on random samples | Cl. 3.2 — Dimensions within tolerance | OK NC NA HOLD |
| C4 | Tile flatness (warping, curvature check) Acceptance: Flatness variation ≤0.5 mm per tile, verified with straightedge | Cl. 3.3 — Tiles must be flat for proper laying | OK NC NA HOLD |