| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. BASE & SURFACE PREPARATION | |||
| A1 | Base layer (PCC) compaction and strength (minimum 40 mm thick) Acceptance: PCC compacted to >95% SPD, 28-day cube strength ≥ M15 | Cl. 4.1 — Base layer must be properly compacted and cured | OK NC NA HOLD |
| A2 | Levelling course thickness and consistency (25-30 mm recommended) Acceptance: Thickness variation ±5 mm over 3 m length | Cl. 4.2 — Levelling course shall be uniform in thickness | OK NC NA HOLD |
| A3 | Surface level check with straightedge (3 m scale) Acceptance: Variation ≤ 5 mm in 3 m length | Cl. 4.3 — Surface undulation control | OK NC NA HOLD |
| A4 | Substrate cleanliness (dust, debris removal) Acceptance: No visible dust, dirt, or loose material on surface | Cl. 5 — Clean, dust-free surface required before adhesive application | OK NC NA HOLD |
| A5 | Cracks and repair verification in substrate Acceptance: All cracks > 2 mm filled with cement mortar, cured ≥ 7 days | Cl. 4.4 — Surface defects must be repaired and cured | OK NC NA HOLD |
| A6 | Moisture content of substrate (if specified, ≤8% for tiles on concrete) Acceptance: Moisture meter reading ≤ 8% for ceramic/vitrified tiles | Cl. 6 — Moisture control for adhesion integrity | OK NC NA HOLD |
| A7 | Gradient/slope verification (if required by design) Acceptance: Slope ±1:100 as per design drawing, verified with level | Cl. 4.5 — Floor gradient for drainage or finish level | OK NC NA HOLD |
| B. MATERIAL INSPECTION & STORAGE | |||
| B1 | Adhesive (cement mortar or proprietary) verification Acceptance: Certificate from supplier, bag condition intact, expiry date checked | Cl. 7 — Adhesive quality and suitability certification | OK NC NA HOLD |
| B2 | Cement grade (OPC 53 or PPC) and sand grade for mortar Acceptance: OPC 53 or PPC, sand coarse M-sand, no salt content detected | Cl. 7.1 — Material quality as per IS codes | OK NC NA HOLD |
| B3 | Storage of materials (protection from moisture/contamination) Acceptance: Materials stored off ground, covered, protected from rain | Cl. 8 — Proper storage conditions for materials | OK NC NA HOLD |
| B4 | Adhesive/mortar batch preparation and consistency Acceptance: Consistent color, proper slump, prepared in small quantities | Cl. 7.2 — Mix design and batching accuracy | OK NC NA HOLD |
| C. PRE-LAYING SITE READINESS | |||
| C1 | Weather and environmental conditions check Acceptance: Temperature 15-35°C, RH 40-90%, no rain during laying | Cl. 9 — Favorable conditions for curing and setting | OK NC NA HOLD |
| C2 | Site layout and work plan for tile laying sequence Acceptance: Laying plan documented, access restricted to laid areas for 24 hrs | Cl. 10 — Organized work sequence to prevent traffic on fresh adhesive | OK NC NA HOLD |
| C3 | Worker training and tool readiness (notched trowel, spacers, level) Acceptance: Workers trained, tools available and calibrated | Cl. 11 — Competent labor and proper equipment | OK NC NA HOLD |
| C4 | Tile samples approval and color/finish consistency verification Acceptance: Approved sample retained, no variations in batch shades | Cl. 3 — Tile quality and appearance acceptance | OK NC NA HOLD |