| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. STRUCTURAL INSPECTION | |||
| A1 | Structure cured and strength achieved (minimum 28 days for RCC; minimum 7 days for plaster) Acceptance: Concrete cube strength ≥20 N/mm² for bearing surfaces; plaster strength ≥2.5 N/mm² measured | Cl. 401 — Maturity requirement | |
| A2 | Structural cracks >2mm sealed with epoxy injection or crack filler before waterproofing Acceptance: Cracks >2mm injected with epoxy resin; cured per product spec; cracks <2mm acceptable | Cl. 401 — Crack treatment | |
| A3 | Structural deflection settled; building movement (thermal/settlement) stabilized Acceptance: No active cracks; settlement complete per structural engineer; documented observation period | Cl. 401 — Movement assessment | |
| B. SURFACE CLEANING & PREPARATION | |||
| B1 | Surface cleaned: Removal of dust, loose mortar, algae, fungi, dirt, debris Acceptance: Wire brush/mechanical cleaning; vacuum removal of dust; no loose material >1mm; visual 100% | Cl. 401 — Cleaning requirement | |
| B2 | Loose plaster removed; surface exposed to concrete; loose concrete removed by chipping Acceptance: Delaminated plaster removed; exposed base surface strong; tapping confirms adhesion | Cl. 401 — Surface exposure | |
| B3 | Surface roughness adequate for adhesion; smooth surfaces scarified or primed Acceptance: CSP (Concrete Surface Profile) 2-3; adhesion promoter applied to smooth surfaces | Cl. 401 — Surface profile | |
| B4 | Oil, grease, paint, previous coating removed; surface chemically clean if required Acceptance: Degreaser wash for oily surfaces; visual inspection shows no sheen; clean towel test | Cl. 401 — Contaminant removal | |
| C. MOISTURE & EFFLORESCENCE CONTROL | |||
| C1 | Surface moisture content <5% measured by hygrometer; surface visually dry Acceptance: Moisture meter reading <5%; no wet patches; surface dry to touch; wait 48 hrs if wet | Cl. 401 — Moisture control | |
| C2 | Efflorescence removed by wire brushing; surface checked for re-appearance (24-48 hrs wait) Acceptance: Brush away white salt deposits; no re-appearance within 48 hours; if returns, apply biocide | Cl. 401 — Salt removal | |
| C3 | Rising damp assessed and treated if present; damp-proof course in place or repair planned Acceptance: Damp detected <1m above ground → DPC repair required; surface treated with desiccant if needed | Cl. 401 — Damp assessment | |