Code of practice for laying and finishing cement concrete flooring tiles

IS 1443: Scope Summary

• Scope: Covers specifications for flooring tiles, including materials, laying, finishing, and related workmanship.

• Key Aspects to Consider (Clause 5.1):

  • Floor and wall areas to be covered
  • Sub-floor details
  • Type and size of flooring units
  • Grinding and polishing methods
  • Finishing treatments on tiles
  • Accommodation for services passing through floors/walls
  • Bedding and jointing types

• Referenced Specifications:

  • Sand for masonry mortars
  • Ordinary, rapid-hardening, and low heat Portland cement
  • Portland blast furnace slag cement
  • Building limes
  • Cement concrete flooring tiles
  • Code of practice for in situ terrazzo flooring

• Rounding Off (Clause 0.5): Test results must be rounded per IS 2:1960, matching the precision of specified values.

This ensures comprehensive planning and quality control for flooring tile works under IS 1443.

IS 1443: Terminology and Definitions (Clause 2.0 & 2.1)

• Tiles (2.1.8) include:
  • Plain cement tiles
  • Plain coloured tiles
  • Terrazzo tiles
  • Chequered, embossed, or non-slip cement tiles
  • Precast staircase treads, risers, wall slabs, etc.

Key Specifications for Planning & Execution (Clause 5.1)

For efficient flooring work, detailed info on the following is essential:

Additional Reference Specifications

• Sand for masonry mortars
• Ordinary, rapid-hardening & low heat Portland cement
• Portland blast furnace slag cement
• Building limes
• Cement concrete flooring tiles
• Code of practice for laying terrazzo floors

Rounding Off Numerical Values

• Follow IS 2 guidelines for rounding numerical data in calculations.

flowchart TD
    A[Tiles] --> B[Plain Cement Tiles]
    A --> C[Plain Coloured Tiles]
    A --> D[Terrazzo Tiles]
    A --> E[Non-slip Cement Tiles]
    A --> F[Precast Staircase Elements]

    G[Planning Info] --> H[Floor & Wall Area]
    G --> I[Sub-floor Details]
    G --> J[Tile Type & Size]
    G --> K[Grinding & Polishing]
    G --> L[Finishing Treatment]
    G --> M[Services Openings]
    G --> N[Bedding & Jointing]

This summary covers the fundamental terminology and key specifications for tile flooring as per IS 1443. For detailed design and execution, refer to respective IS codes mentioned.

IS 1443: Key Specifications & Materials Information

1. Materials Specifications (Clause 5.1)

• Sand for masonry mortars: As per relevant IS standard (IS 2116).
• Portland Cement:
  • Ordinary, Rapid-hardening, Low heat (Second revision).
  • Portland Blast Furnace Slag Cement (Second revision).
• Building Limes: As per revised IS standards.
• Cement Concrete Flooring Tiles: Follow IS specifications.
• Water: Must be clean, free from oil, acid, alkali, organic or vegetable matter (Clause 4.7). Sea water prohibited.

2. Tiles Definition (Clause 2.1.8)

• Plain cement tiles
• Plain coloured tiles
• Terrazzo tiles
• Chequered, embossed, non-slip tiles
• Precast staircase treads, risers, wall slabs

3. Handling & Storage (Clause 8.1)

• Proper storage to avoid contamination and damage.
• Protect from moisture and contaminants.

Quick Reference Table: Water Quality for Mixing

Summary Flow for Material Selection & Preparation

flowchart TD
    A[Start: Project Planning] --> B[Determine Floor & Wall Area]
    B --> C[Select Tile Type (Clause 2.1.8)]
    C --> D[Choose Cement Type (Ordinary/Rapid/Low Heat/Slag)]
    D --> E[Select Sand & Lime as per IS]
    E --> F[Check Water Quality (Clause 4.7)]
    F --> G[Plan Handling & Storage (Clause 8.1)]
    G --> H[Execution]

This ensures compliance with IS 1443 for durable, quality flooring and wall finishes.

IS 1443: Tile Types and Specifications - Key Points

Tile Types (Clause 2.1.8)

• Plain cement tiles
• Plain coloured tiles
• Terrazzo tiles
• Chequered, embossed, or non-slip cement tiles
• Precast staircase treads, risers, wall slabs

Important Specifications (Clause 5.1)

• Area to be covered (floor/wall)
• Sub-floor details
• Tile type and unit size
• Grinding and polishing method
• Finishing treatments
• Services passing through flooring/walls
• Bedding and jointing type

Permissible Tolerances (Summary)

• Tolerances in tile laying (level, alignment) are specified but not detailed here; consult manufacturer or IS code annexures.

Additional References

• Specifications for sand, Portland cement (ordinary, rapid-hardening, low heat), blast furnace slag cement, and building limes apply.
• Follow IS code for terrazzo floor laying for finishing.

Typical Tile Size & Thickness (General Reference)

Bedding & Jointing (General)

• Bedding mortar: Cement-sand mix (1:3 or 1:4)
• Joint width: 2-3 mm (filled with cement slurry or grout)

flowchart TD
    A[Tile Selection] --> B[Assess Area & Sub-floor]
    B --> C[Choose Tile Type & Size]
    C --> D[Decide Bedding & Jointing]
    D --> E[Apply Finishing Treatment]
    E --> F[Laying & Polishing]

For detailed tolerances and laying procedures, refer to IS 1443 annexures and manufacturer's guidelines.

IS 1443: Information and Coordination Key Points

1. Information Required for Planning (Clause 5.1)

For efficient execution, detailed data must be gathered on:

• Floor & wall area to be covered
• Sub-floor details
• Type & size of flooring units
• Grinding and polishing methods
• Finishing treatments over tiles
• Services passing through flooring/walls (e.g., plumbing, electrical)
• Type of bedding and jointing

2. Coordination (Clause 5.3)

• Ensure proper interchange of information between tile layers and other trades.
• Coordination avoids conflicts and ensures quality.

3. References to Other IS Codes

• Sand for masonry mortars
• Various types of Portland cement (ordinary, rapid-hardening, low heat)
• Portland blast furnace slag cement
• Building limes
• Cement concrete flooring tiles
• Code of practice for terrazzo flooring

4. Time Schedule (Clause 6)

• A clear time schedule must be prepared for smooth workflow.

Summary Diagram: Coordination Flow

flowchart LR
    A[Design & Planning] --> B[Information Collection]
    B --> C[Tile Laying Team]
    B --> D[Other Trades (Electrical, Plumbing)]
    C --> E[Execution]
    D --> E
    E --> F[Inspection & Finishing]

This ensures seamless communication and quality control during flooring works.

IS 1443 - Time Schedule (Clause 6)

When preparing the time schedule for flooring works, IS 1443 emphasizes:

• Preliminary operations: Allow adequate time for laying services (electrical, plumbing) that affect flooring start/completion.
• Concrete hardening: Ensure sufficient curing time of base concrete before tile laying.

Key Points for Time Scheduling:

• Coordinate with all trades to avoid conflicts (Clause 5.3).
• Consider floor area, sub-floor type, tile size/type, grinding/polishing, finishing, and services embedded (Clause 5.1).
• Account for bedding and jointing materials and their setting times.

Typical Curing Times (Reference from IS 456):

Planning Checklist:

• Confirm sub-floor readiness.
• Schedule service installations early.
• Allow curing as per cement type.
• Plan grinding/polishing after tile laying.

flowchart TD
    A[Preliminary Operations] --> B[Service Laying]
    B --> C[Concrete Base Hardening]
    C --> D[Tile Laying]
    D --> E[Grinding & Polishing]
    E --> F[Finishing Treatment]

Summary: Proper coordination and curing time are critical for successful flooring installation per IS 1443.

IS 1443 — Facilities for the Work: Key Points & Specifications

1. Time Scheduling (Clause 6.1)

• Allow sufficient time for:
  • Preliminary operations (e.g., laying services affecting flooring schedule).
  • Hardening of base concrete before flooring.

2. Owner's Responsibility (Clause 7.1)

• Owner must provide facilities (Clauses 7.2 to 7.4) to enable the tile-laying contractor to work efficiently.

3. Essential Information for Planning (Clause 5.1 & 5.2)

Before starting work, provide detailed info on:

• Floor & wall area.
• Sub-floor details.
• Flooring type & tile size.
• Grinding & polishing methods.
• Finishing treatments.
• Services passing through flooring/walls.
• Bedding and jointing types.

4. Related Specifications

• Sand for masonry mortars.
• Ordinary, rapid-hardening & low heat Portland cement.
• Portland blast furnace slag cement.
• Building limes.
• Cement concrete flooring tiles.
• Code for laying in situ terrazzo floor finish.

Summary Table: Pre-Work Requirements

flowchart TD
    A[Owner Provides Facilities] --> B[Contractor Plans Work]
    B --> C[Preliminary Operations]
    C --> D[Concrete Base Hardening]
    D --> E[Tile Laying Execution]

Note: Always ensure all preparatory drawings and instructions are shared before work begins for smooth execution.

IS 1443: Preparatory Work Key Points

Clause 5.1 - Information Required for Planning

• Floor & wall area to be covered.
• Sub-floor details (type, condition).
• Type & size of flooring units.
• Grinding & polishing methods.
• Finishing treatments on tiles.
• Specifications referenced:
  • Sand for masonry mortars.
  • Ordinary, rapid-hardening, low heat Portland cement.
  • Portland blast furnace slag cement.
  • Building limes.
  • Cement concrete flooring tiles.
  • Laying in situ terrazzo floor finish.
• Services passing through flooring/walls.
• Type of bedding and jointing.

Clause 6.1 - Scheduling

• Allow time for preliminary operations (services installation).
• Allow time for concrete base hardening before flooring.

Clause 7.4 - Dampness Protection

• Apply recognized damp-proofing if dampness is suspected.
• Waterproof side walls up to 15 cm above sub-floor level.

Summary Table for Preparatory Work

flowchart TD
    A[Start Preparatory Work] --> B[Gather Info (Clause 5.1)]
    B --> C[Check Sub-floor Condition]
    C --> D{Dampness Suspected?}
    D -- Yes --> E[Apply Damp-proofing (Clause 7.4)]
    D -- No --> F[Proceed]
    E --> F
    F --> G[Schedule Work (Clause 6.1)]
    G --> H[Complete Preliminary Operations]
    H --> I[Concrete Base Hardening]
    I --> J[Start Flooring Installation]

Note: Refer to IS 1443 annexures and related IS codes for detailed material specifications and methods.

IS 1443: Preparation of Mortar — Key Points

1. Cement Mortar (Clause 9.1.1)

• Mix ratio: 1 part Portland cement : 6 parts coarse sand (by volume).
• Water: Minimum quantity for sufficient plasticity and workability.
• Note: Avoid high water-cement ratio to reduce drying shrinkage.

2. Lime Mortar (Clause 9.1.3)

• Mix proportions (by volume):
  • a) 1 lime : 1 surkhi : 2 coarse sand
  • b) 1 lime : 3 surkhi
  • c) 1 lime : 3 coarse sand

3. Preparation Method

• Thoroughly mix dry ingredients by volume; ensure no lumps.
• Add water gradually and mix thoroughly for uniform consistency.

Summary Table: Mortar Mix Proportions

flowchart TD
    A[Dry Ingredients] --> B[Mix Thoroughly]
    B --> C[Add Water Gradually]
    C --> D[Mix to Uniform Consistency]
    D --> E[Ready for Laying Tiles]

Tip: Use mechanical mixers for uniformity and avoid lumps for better mortar performance.

IS 1443: Key Points on Laying of Tiles

1. Preparation & Bedding (Clause 9.1.4 & 10.1)

• Start laying tiles next morning after bedding mortar hardens enough to support weight.
• Apply neat cement slurry (honey-like consistency) over mortar bed.
• Spread slurry over area for about 20 tiles at a time.
• Place tiles one by one, tapping gently with a wooden mallet.
• Ensure tiles are level and joints are straight.
• Maintain joint width = 1.5 mm (typical).

2. Planning Considerations (Clause 5.1)

• Determine:
  • Floor/wall area.
  • Sub-floor details.
  • Tile type and size.
  • Grinding/polishing requirements.
  • Finishing treatments.
  • Provisions for services (pipes, conduits).
  • Bedding and jointing type.

3. Specifications & References

• Use ordinary/rapid-hardening Portland cement.
• Sand for masonry mortar as per IS standards.
• Refer to:
  • IS for cement concrete flooring tiles.
  • IS code for terrazzo floor finishes.

Typical Tile Laying Process Flow (Mermaid Diagram)

flowchart TD
    A[Prepare mortar bed] --> B[Allow mortar to harden overnight]
    B --> C[Apply neat cement slurry]
    C --> D[Place tiles (20 at a time)]
    D --> E[Tamp tiles gently with wooden mallet]
    E --> F[Check level and joint alignment]
    F --> G[Maintain 1.5 mm joints]

Summary: Proper timing, slurry application, joint control, and planning are critical for durable tile laying as per IS 1443.

IS 1443: Grinding and Polishing of Tiles - Key Specifications

Grinding & Polishing Sequence (Clause 11.3 & 11.4)

1. First Grinding:

   • Machine with carborundum stones 48-60 grit.
   • Achieve even surface; expose uniform chips.
   • Clean with water to expose pin holes.

2. Grouting:

   • Apply grout of matching shade briskly to fill pin holes.
   • Keep grout moist for 1 week for proper setting.

3. Second Grinding:

   • Use carborundum stones 120 grit.
   • Re-grout fine pin holes and cure.

4. Final Grinding:

   • Use carborundum stones 220-350 grit with plenty of water.
   • Prevent foreign particles during grinding.

5. Polishing:

   • Apply oxalic acid powder with hessian bobs to bring sheen.
   • Wash and dry with linen to absorb moisture.
   • Optional: Mechanical wax polish with hessian bobs. Mop excess wax with sawdust.

Special Note for Plain Cement & Coloured Tiles (Clause 11.5)

• Initial grinding with 48-60 grit carborundum may be skipped.

Summary Table of Grit Sizes and Process

flowchart TD
    A[Start: Terrazzo Flooring] --> B[1st Grinding (48-60 grit)]
    B --> C[Clean & Expose Pin Holes]
    C --> D[Grouting & Moist Cure (1 week)]
    D --> E[2nd Grinding (120 grit)]
    E --> F[Re-grouting & Cure]
    F --> G[Final Grinding (220-350 grit)]
    G --> H[Apply Oxalic Acid & Polish]
    H --> I[Optional Wax Polish & Sawdust]
    I --> J[Finish

IS 1443: Key Specifications for Laying Rough Tiles

1. Preparation & Bedding (Clause 10.1)

• Start laying tiles next morning after bedding mortar has hardened enough to support weight.
• Apply a neat cement slurry (honey-like consistency) over the mortar bed.
• Spread slurry over an area for about 20 tiles at a time.
• Tiles are fixed one by one, gently tapped with a wooden mallet to bed properly and level with adjacent tiles.

2. Jointing

• Maintain joints about 1.5 mm wide.
• Keep joints close and in straight lines for uniform appearance.

3. General Notes

• Use wooden planks to squat on while laying to avoid disturbing the bedding.
• Ensure the bedding offers a rigid cushion for tiles.

Summary Table

flowchart TD
    A[Mortar Bedding] --> B[Let harden overnight]
    B --> C[Spread cement slurry (honey-like)]
    C --> D[Place ~20 tiles on slurry]
    D --> E[Tap tiles gently with wooden mallet]
    E --> F[Ensure 1.5 mm joints, straight lines]

This method ensures durable, level, and well-bonded rough tile flooring as per IS 1443.

IS 1443: Permissible Deviations and Tolerances

Key Specifications:

• Permissible deviation from datum (Clause 13.1):

  • For large open areas: up to 15 mm deviation allowed.
  • For localized areas: deviation of 3 mm in any 3 m length accepted for nominally flat floors.

• Tolerances in tile laying (Clause c):

  • Specific permissible tolerance values for tile laying are provided (exact values not detailed in the excerpt).

• Rounding off results (Clause 0.5):

  • Use IS 2-1960 rounding rules.
  • Maintain the same number of significant figures as the specified value.

Practical Notes:

• Large floor areas can tolerate more deviation due to cumulative effects.
• Localized deviations must be minimal to maintain flatness and aesthetics.
• Always verify tolerances against the specific tile or flooring manufacturer's guidelines in addition to IS 1443.

Summary Table:

graph LR
A[Floor Area] --> B[Large Open Area]
A --> C[Localized Area (3 m)]
B --> D[Deviation ≤ 15 mm]
C --> E[Deviation ≤ 3 mm]

This ensures quality control and uniformity in flooring work per IS 1443.

IS 1443 Key Points on Skirting, Dado & Staircase-Tread Work

1. Skirting & Dado Work (Clause 14.1 & 14.3)

• Sequence:
  • Lay floor tiles first.
  • Fix tile skirtings only after floor tiles are laid.
  • For dado tiles, leave the wall unplastered in the dado area before fixing tiles.
• Finishing:
  • Skirtings and dado must be ground and polished like floor tiles, preferably by machine; hand polishing is allowed if machines are unavailable.

2. Staircase Tread & Riser (Clause 14.4)

• Precast treads and risers shall be laid and polished similarly to floor tiles.

3. Permissible Deviations (Clause 13.1)

• Flat floor tolerance:
  • Up to 15 mm deviation for large open areas.
  • Localized deviation of 3 mm in any 3 m for nominally flat floors.

Summary Table

flowchart TD
  A[Start: Floor Tile Laying] --> B[Fix Skirting Tiles]
  B --> C[Wall Dado Area Left Unplastered]
  C --> D[Fix Dado Tiles]
  D --> E[Lay Precast Stair Treads & Risers]
  E --> F[Polish All (Skirting, Dado, Treads)]

This ensures uniform finish and adherence to IS 1443 quality standards.

IS 1443: Finishing and Quality Requirements - Key Points

1. Rounding Off Values (Clause 0.5)

• Final test or analysis values must be rounded per IS 2-1960.
• Retain the same number of significant figures as specified in the standard.

2. Planning Information (Clause 5.1)

For efficient execution, gather details on:

• Floor & wall area to cover.
• Sub-floor specifics.
• Flooring type & unit size.
• Grinding & polishing methods.
• Finishing treatments on tiles.
• Services passing through flooring/walls.
• Bedding and jointing types.

3. Finished Floor Quality (Clause 15.1)

• Surface must be even, smooth, and shining.
• Joints should be correctly aligned.
• Efflorescence may appear initially but fades after 2-3 months of cleaning.
• Minor shade variations in cement and marble chips are acceptable.

4. Water Quality (Clause 4.7)

• Use clean water free of oils, acids, alkalis, and organic matter.
• Sea water is prohibited.

Summary Table: Finishing Quality Checks

flowchart TD
    A[Planning] --> B[Area & Sub-floor Details]
    B --> C[Flooring Type & Size]
    C --> D[Grinding & Polishing]
    D --> E[Finishing Treatment]
    E --> F[Jointing & Bedding]
    F --> G[Execution]
    G --> H[Finished Floor: Smooth & Shining]
    H --> I[Maintenance: Cleaning & Efflorescence Control]

This concise guide ensures adherence to IS 1443 finishing and quality norms for durable, aesthetic flooring.

IS 1443: Maintenance of Flooring (Clauses 16.2 & 16.3)

Key Points:

• Clause 16.2 (Subsequent Maintenance):
  Maintenance after final polishing is the owner's responsibility.

• Clause 16.3 (Information to Owner):
  The tile-laying contractor must provide the owner with detailed maintenance instructions to ensure longevity and performance.

Maintenance Specifications Summary:

Recommended Maintenance Instructions (Typical):

• Use clean water and mild detergents.
• Avoid acidic or alkaline cleaners.
• Do not use sea water or contaminated water.
• Periodically check for cracks or loose tiles.
• Re-polish or seal as recommended by tile manufacturer.

Contact for Technical Support:

IS 1443 provides regional and branch office contacts for technical assistance, e.g., Manak Bhavan, New Delhi, and regional offices across India.

flowchart LR
    A[Floor Completed & Polished] --> B[Owner Takes Responsibility]
    B --> C[Receives Maintenance Instructions]
    C --> D[Regular Cleaning & Inspection]
    D --> E[Periodic Polishing/Sealing]
    E --> F[Long-lasting Flooring Performance]

Summary: Proper maintenance per IS 1443 ensures durability; owners must follow contractor's instructions, use clean water, avoid harsh chemicals, and perform regular upkeep.