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Tile Grout Complete Guide
Grout is the most overlooked material in any tile installation. It fills less than 10% of the total tiled surface area — yet it is responsible for more tile installation failures than almost any other variable. Cracked grout allows water to penetrate to the substrate. Unsealed grout in bathrooms permanently stains within months. Wrong grout colour ruins the appearance of expensive vitrified tiles. Wrong grout width causes tile lippage on rectified tiles or cracking on tiles with high thermal movement. In Indian residential construction, grout selection and application are almost universally treated as an afterthought. The tile is specified carefully; the grout is bought by the contractor without reference to the tile type, joint width, or room moisture conditions. This guide covers every aspect of grout — type selection, joint width, mixing, application, curing, sealing, and long-term maintenance — for Indian residential and light commercial tiling.
Last updated: June 25, 2026
What Grout Does — and What It Cannot Do
Grout serves three functions in a tile installation: it seals the joints between tiles against moisture and debris ingress, it provides lateral restraint between tiles (preventing individual tiles from rocking or lifting at edges), and it contributes to the aesthetic of the finished surface through colour and joint width.
Understanding what grout cannot do is equally important. Grout is not a structural adhesive — it does not bond tiles to the substrate. Grout is not a waterproofing membrane — it reduces water ingress but does not eliminate it in cement-based forms. Grout is not a flexible sealant — movement joints at tile perimeters and structural changes of plane must be filled with silicone sealant, not grout.
Cannot Do
- Grout cannot compensate for inadequate tile adhesive coverage — if tiles are not fully bonded, grout provides no structural support
- Cement-based grout cannot fully waterproof a joint — water under pressure (shower enclosures, pool surrounds) requires epoxy grout or a separate waterproofing layer beneath the tile bed
- Grout cannot be used at movement joints — all perimeter joints and expansion joints must be filled with flexible silicone sealant
- Grout cannot hide poor tile alignment — lippage (height mismatch between adjacent tiles) is visible at every joint regardless of grout colour
- Grout cannot be applied over incompletely cured adhesive — doing so traps moisture and causes both the adhesive and grout to fail
Types of Tile Grout
Four main grout types are used in Indian residential and commercial construction. Each has a specific range of applications, advantages, and limitations. Choosing the wrong type is the most common grout specification error on Indian sites.
Types
Cement-Based Unsanded Grout
Composition
Portland cement + fine fillers + water retention additives. No sand — smooth, fine texture.
Joint Width
1.5–3mm (narrow joints on rectified tiles)
Water Resistance
Moderate — porous; absorbs water and stains unless sealed
Applications
- Rectified vitrified tiles with tight joints (1.5–2mm)
- Wall tiles with narrow joints
- Polished marble and stone where sand would scratch the tile surface
Advantages
- Smooth finish in narrow joints
- Available in wide colour range
- Easy to apply and tool
Limitations
- Stains easily — must be sealed in wet areas
- Not suitable for joints over 3mm — shrinks and cracks
- Not suitable for high-moisture or chemical exposure without sealing
Indian Availability
Available from all major Indian manufacturers — Saint-Gobain Weber, Pidilite (Roff), MYK Laticrete, Ardex Endura
Cement-Based Sanded Grout
Composition
Portland cement + graded sand + water retention additives and polymer modifier.
Joint Width
3–12mm (standard residential floor and wall tiles)
Water Resistance
Moderate — porous like unsanded; sealing required in wet areas
Applications
- Standard floor tiles (600×600mm, 400×400mm) with 3–5mm joints
- Bathroom floor tiles
- Kitchen floors
- General residential tiling — the most widely used grout type in India
Advantages
- Sand prevents shrinkage cracking in wider joints
- Cost-effective — least expensive grout type
- Familiar to all tile setters in India
- Available in many colours
Limitations
- Sand can scratch polished tile surfaces if applied carelessly
- Porous — requires sealing in wet areas
- Colour variation between batches
- Not suitable for chemical exposure or food-contact surfaces without sealing
Indian Availability
Widely available; standard product stocked by all tile material suppliers
Polymer-Modified Cement Grout
Composition
Portland cement + graded sand + polymer (acrylic or SBR) modifier. The polymer modifier is either pre-mixed into the dry powder or supplied as a separate liquid additive.
Joint Width
2–10mm
Water Resistance
Good — polymer modifier reduces porosity and improves water and stain resistance compared to plain cement grout
Applications
- Bathroom floors and walls
- Kitchen floors
- Any wet area where standard cement grout would be specified but better performance is needed
- Areas with cleaning chemical exposure
Advantages
- Better stain resistance than plain cement grout
- Better flexibility — reduced risk of cracking from minor substrate movement
- Better adhesion to tile edges and substrate
- Does not require sealing in most residential wet areas (though sealing is still recommended)
Limitations
- More expensive than plain cement grout
- Working time shorter than plain cement grout — must not be re-wetted once set begins
- Some polymer-modified grouts are sensitive to high temperature during curing — avoid direct sun
Indian Availability
Available from Saint-Gobain Weber (Weberjoint), Pidilite Roff (Roff Coloured Tile Grout), MYK Laticrete (Laticrete Grout), Ardex Endura (TA-66)
Epoxy Grout (2-Part)
Composition
Two-component system: Part A (epoxy resin + pigment) + Part B (hardener). Mixed on site immediately before use. Sets by chemical reaction, not by drying.
Joint Width
2–12mm
Water Resistance
Excellent — fully impermeable when cured; water and chemical resistant
Applications
- Bathrooms and wet areas where maximum moisture resistance is required
- Kitchen floors and food preparation areas
- Swimming pools and pool surrounds
- Chemical exposure areas
- Hospitals, laboratories, commercial kitchens
- Any area where grout must resist permanent water exposure, staining, or cleaning chemicals
Advantages
- Virtually impermeable — no sealing required
- Does not stain permanently — easy to clean
- Chemical resistant — withstands cleaning agents, mild acids, and food acids
- Does not support mould or bacterial growth
- Long service life — 15–20 years without significant degradation
Limitations
- Significantly more expensive than cement grout — 3–5× the cost
- Requires higher skill to apply — must be mixed precisely, applied quickly, and cleaned off tile surfaces before it cures
- Working time is short (typically 30–45 minutes at 25°C, shorter in hot weather)
- Difficult to remove from tile surfaces if allowed to cure — epoxy residue on tile face is very difficult to clean
- Cannot be used at temperatures below 10°C or above 35°C — temperature affects mixing ratio and cure
- Not repairable by colour-matched touch-up — damaged areas require removal and full replacement
Indian Availability
Pidilite Roff (Roff 2K Epoxy Grout), MYK Laticrete (Latapoxy SP-100), Ardex Endura (ER-11), Saint-Gobain Weber (Weberfloor Epoxy Grout)
Furan Grout (Industrial Grade)
Composition
Furan resin-based — a highly chemical-resistant specialty grout for industrial applications.
Joint Width
As specified
Water Resistance
Excellent — superior to epoxy for chemical resistance
Applications
- Industrial floors with strong acid or alkali exposure
- Chemical plant flooring
- Brewery and food processing floors — not typically used in residential construction
Advantages
- Highest chemical resistance of any grout type
Limitations
- Very high cost; specialist application; not relevant for residential use in India
Indian Availability
Specialist industrial suppliers — not stocked by standard tile material dealers
Grout Joint Width — How to Select
Grout joint width is one of the most important decisions in tile specification. It affects appearance, material consumption, the required grout type, and long-term maintenance. The correct joint width depends on tile type, tile size, substrate condition, and application.
Recommended grout joint widths for common tile types in India
| Tile Type / Condition | Recommended Joint Width | Grout Type | Notes |
|---|---|---|---|
| Rectified vitrified tiles (precision-cut edges) | 1.5–3mm | Unsanded or fine-grain polymer grout | Rectified tiles have consistent dimensions — tight joints are achievable without misalignment |
| Standard vitrified tiles (non-rectified) | 3–5mm | Sanded or polymer-modified grout | Size variation ±0.5% between tiles needs wider joints to absorb without lippage |
| Ceramic wall tiles (standard) | 2–3mm | Unsanded or fine-grain polymer grout | Wall tiles — narrower joints look cleaner on vertical surfaces |
| Ceramic floor tiles (standard) | 3–5mm | Sanded grout | Floor tiles need wider joints for level adjustment; sanded grout required |
| Natural stone — marble, granite (honed/polished) | 2–4mm | Unsanded grout only — sand scratches polished surfaces | Veining must be matched across joints; narrow joints make stone look more continuous |
| Kota stone (natural, irregular edge) | 5–8mm | Sanded grout | Irregular natural edges require wider joints to maintain alignment |
| Mosaic tiles (mesh-backed) | 2–3mm (between individual tiles) | Unsanded grout | Joints within the mosaic sheet; sheet edges grouted at 3–5mm |
| Large format tiles (600mm+) | 3–5mm | Polymer-modified grout | Larger thermal movement requires adequate joint width; polymer grout for flexibility |
| Outdoor tiles (balcony, terrace) | 5–8mm | Polymer-modified or epoxy grout | Outdoor tiles experience significant thermal expansion — wider joints essential |
| Bathroom floor (wet area) | 3–5mm | Epoxy grout or polymer-modified with sealant | Permanent water exposure — maximum water resistance required |
Selection Rules
- Never specify a joint width narrower than 1.5mm for any ceramic or vitrified tile — joints below 1.5mm cannot be properly filled with cement grout and will crack.
- Never use unsanded grout in joints wider than 3mm — the lack of aggregate causes shrinkage cracking as the grout dries.
- Never use sanded grout on polished marble, polished granite, or polished vitrified tiles — the sand scratches the polished surface during application.
- For rectified tiles, a 2mm joint is the practical minimum that allows for slight installation tolerance — 1.5mm is achievable only with a very flat substrate and highly skilled installation.
- Outdoor tiles must have a minimum 5mm joint to accommodate thermal expansion — narrow joints in outdoor tiling cause tile cracking during hot Indian summers when the tile body expands against adjacent tiles.
Grout Quantity Estimation
Grout quantity depends on four variables: tile size, joint width, tile thickness, and total tiling area. The formula below gives a reliable estimate for cement-based grouts.
Formula
Title
Grout Volume Formula
Equation
Grout (kg/m²) = [(Tile Length + Tile Width) ÷ (Tile Length × Tile Width)] × Joint Width × Tile Thickness × Grout Density
Simplified
For a practical field estimate: Grout per m² ≈ [(L+W) ÷ (L×W)] × J × T × 1.8
Variables
- L = Tile length (mm)
- W = Tile width (mm)
- J = Joint width (mm)
- T = Tile thickness (mm)
- 1.8 = Approximate density of cured cement grout (kg/litre)
Grout quantity reference — kg per m² for common tile sizes and joint widths
| Tile Size | Joint 2mm | Joint 3mm | Joint 5mm | Joint 8mm |
|---|---|---|---|---|
| 200 × 200 × 8mm | 0.72 kg/m² | 1.08 kg/m² | 1.80 kg/m² | 2.88 kg/m² |
| 300 × 300 × 8mm | 0.48 kg/m² | 0.72 kg/m² | 1.20 kg/m² | 1.92 kg/m² |
| 400 × 400 × 9mm | 0.40 kg/m² | 0.61 kg/m² | 1.01 kg/m² | 1.62 kg/m² |
| 600 × 600 × 10mm | 0.30 kg/m² | 0.45 kg/m² | 0.75 kg/m² | 1.20 kg/m² |
| 800 × 800 × 10mm | 0.23 kg/m² | 0.34 kg/m² | 0.56 kg/m² | 0.90 kg/m² |
| 300 × 600 × 9mm | 0.45 kg/m² | 0.68 kg/m² | 1.13 kg/m² | 1.80 kg/m² |
| 600 × 1200 × 10mm | 0.25 kg/m² | 0.38 kg/m² | 0.63 kg/m² | — |
Note
Add 10% to the calculated quantity for waste during mixing and application. Epoxy grout consumption is similar in volume but sold in pre-measured kits — check manufacturer coverage data for the specific product.
Example — Bathroom floor 4.5 m², 300×300mm tiles, 3mm joint
- From table: grout per m² for 300×300mm at 3mm joint = 0.72 kg/m²
- Total grout = 4.5 × 0.72 = 3.24 kg
- Add 10% wastage = 3.24 × 1.10 = 3.56 kg
- Order: 1 × 5 kg bag (standard pack size — allows for re-grouting any gaps after first cure)
Grout Application — Step by Step
Correct grout application determines the quality of the finished joint — fill consistency, surface cleanliness, and colour uniformity. Most grout problems visible on finished floors — pinholes, colour variation, smearing — are application errors.
Preparation
- Allow tile adhesive or mortar bed to cure for a minimum of 24 hours (adhesive) or 48 hours (mortar bed) before grouting. Grouting over uncured adhesive traps moisture, weakens adhesive bond, and causes grout discolouration.
- Remove all tile spacers from joints before grouting. Spacers left in joints prevent grout from filling the joint to full depth.
- Clean all joints of adhesive squeeze-out and debris using a narrow scraper or grout saw. Any hardened adhesive in the joint reduces grout fill depth and creates a weak point.
- Dampen the joint faces with clean water before applying cement-based grout — prevents dry substrate from drawing water out of the grout too quickly (premature drying causes weak, crumbly grout). Do not apply to epoxy grout joints.
- Mix grout to the consistency specified on the product data sheet — typically a smooth, lump-free paste that holds its shape without slumping. Mix only what can be used within the working time (typically 30–60 minutes for cement grout, 30–45 minutes for epoxy grout at 25°C).
Application Steps
1
Action
Load grout onto the float
Detail
Use a rubber-faced grout float for floor tiles and a window squeegee or rubber float for wall tiles. Load the float with grout from the bucket or mixing container.
2
Action
Apply grout diagonally
Detail
Hold the float at 45° to the tile surface and work in diagonal sweeping strokes across the joints — not parallel to them. Diagonal application forces grout into the joint more effectively than parallel strokes and prevents the float edge from dragging grout out of the joint.
3
Action
Pack joints fully
Detail
Work the grout into every joint until it is flush with the tile surface. There should be no voids, pinholes, or low spots in the filled joint. Incomplete joint fill allows water to pool in the void and causes grout cracking.
4
Action
Remove excess grout from tile surface
Detail
Hold the float at a steeper angle (60–75°) and sweep diagonally across the tiles to scrape off excess grout from the tile face. Work in sections of 0.5–1.0 m² — do not apply grout to more area than you can clean before it begins to set.
5
Action
Initial cleaning with damp sponge
Detail
Dampen a grout sponge (large, fine-pored foam sponge) and wring it out thoroughly — it should be damp, not wet. Wipe the tile surface in circular motions to remove grout film. Rinse the sponge frequently in clean water. Do not use too much water — excess water dilutes the grout and causes surface whitening (efflorescence) when it dries.
6
Action
Tool the joints (optional but recommended)
Detail
Before the grout fully sets (typically 15–20 minutes after application), drag a rounded jointing tool or the rounded end of a grout float along each joint to compact and slightly concave the joint surface. This produces a denser, more durable joint surface and gives a consistent joint profile across all joints.
7
Action
Final haze removal
Detail
After the grout has set but before it has fully hardened (typically 1–3 hours after initial application), wipe the tile surface with a clean damp cloth to remove the grout haze — the thin film of cement residue left on tile faces. If the haze is allowed to harden fully, it requires an acid cleaner to remove.
8
Action
Curing
Detail
Allow cement-based grout to cure undisturbed for 24 hours minimum before light foot traffic; 72 hours before normal use. In hot, dry conditions (common in many Indian cities), mist the grouted surface lightly with water twice a day for 24–48 hours to prevent rapid drying, which causes surface cracking and colour variation.
Epoxy Cautions
- Epoxy grout must be applied at 15–30°C — below 15°C the hardener does not cure properly; above 35°C the working time shortens dangerously.
- Mix Part A and Part B in the exact ratio specified by the manufacturer — incorrect ratio produces under-cured or brittle grout.
- Work in small sections (0.5 m² maximum for beginners, up to 1.5 m² for experienced applicators) — epoxy grout begins to firm up rapidly after the working time expires.
- Epoxy residue on tile faces must be removed before curing — use the manufacturer's recommended cleaner (typically a solvent-based film remover). Cured epoxy on tile surfaces is extremely difficult to remove without risk of tile surface damage.
- Do not apply epoxy grout when the tile surface is wet — moisture prevents proper bonding of the epoxy to the joint faces.
Grout Sealing
Sealing cement-based grout is essential in all wet areas, kitchens, and any area subject to staining. Sealing closes the surface pores of cement grout, preventing water, oil, and food acids from penetrating and staining the grout permanently.
When To Seal
- All bathroom floors and walls with cement-based grout — seal within 7 days of grouting and reapply every 2–3 years
- Kitchen floor grout — seal before first use; reapply annually in high-usage kitchens
- Balcony and outdoor tile grout — seal annually
- Light-coloured grout in any room — especially white and light grey joints that show stains visibly
- Natural stone tile joints — both the grout and the stone surface should be sealed
When Not To Seal
- Epoxy grout — fully impermeable; does not require sealing
- New cement grout that has not fully cured — seal only after 28 days minimum (IS 13630 curing period reference); sealing wet grout traps moisture
Sealer Types
Type
Penetrating impregnating sealer (silane/siloxane)
Description
Penetrates into the grout pores and bonds to the cement matrix. Does not change surface appearance — the grout looks the same after sealing. Best long-term performance.
Application
Apply with a brush or cloth to the joint after cleaning; wipe off excess within 3–5 minutes; allow 24 hours before water exposure
Reapplication
Every 2–3 years depending on exposure
Type
Topical/surface sealer (acrylic or polyurethane)
Description
Forms a film over the grout surface. May slightly darken the grout colour or add sheen. Easier to apply than penetrating sealer but wears off the surface faster.
Application
Apply with a brush or sponge; allow to dry; buff with a dry cloth
Reapplication
Every 1–2 years — the surface film wears with traffic and cleaning
Indian Products
Pidilite Roff Grout Guard, MYK Laticrete Grout Enhancer, Saint-Gobain Weber Sealer — available from tile material suppliers
Room-by-Room Grout Specifications
Grout specification must be matched to each room's moisture exposure, traffic level, and cleaning requirements. Using the same grout throughout a house is a common cost-cutting shortcut that produces premature failure in wet areas.
Rooms
Living Room / Dining Room (dry floor)
Grout Type
Polymer-modified cement grout (sanded)
Joint Width
3–5mm for vitrified tiles
Colour
Match tile colour or slightly contrasting for design — no performance constraint on colour in dry areas
Sealing
Optional — recommended for light-coloured grout; reapply every 3 years
Notes
Polymer-modified preferred over plain sanded cement grout — better stain resistance for dropped food and drink
Bedroom (dry floor)
Grout Type
Cement-based sanded or polymer-modified
Joint Width
2–3mm for rectified vitrified; 3–5mm for standard
Colour
Match tile colour — grout lines should be minimally visible in a bedroom
Sealing
Not required unless light-coloured grout
Notes
Lowest moisture exposure in the house — any cement grout type is adequate
Kitchen Floor
Grout Type
Polymer-modified cement grout or epoxy grout
Joint Width
3–5mm
Colour
Dark grey or mid-tone — light grout on kitchen floors stains from cooking oil and spills regardless of sealing frequency
Sealing
Mandatory if cement-based grout; seal before first use and annually thereafter
Notes
Epoxy grout is the best-performing option for Indian kitchens — the combination of oil, turmeric, and acid from food permanently stains unsealed cement grout
Bathroom Floor
Grout Type
Epoxy grout (preferred) or polymer-modified cement with sealant
Joint Width
3–5mm
Colour
Mid-tone or dark — bathroom floor grout is permanently wet; light grout shows soap scum and mould
Sealing
Mandatory for cement grout — seal within 7 days; reapply every 2 years
Notes
Epoxy grout eliminates all sealing and most cleaning maintenance concerns on bathroom floors; the higher upfront cost is recovered in reduced maintenance over the life of the floor
Bathroom Walls
Grout Type
Polymer-modified cement grout or epoxy grout for shower enclosures
Joint Width
2–3mm
Colour
Match wall tile colour for a seamless appearance; dark grout on white wall tiles shows soap deposits
Sealing
Required for cement grout in shower areas; seal within 7 days
Notes
Shower enclosures (where water is directed at the wall) should use epoxy grout — standard cement grout behind shower heads saturates and fails within 3–5 years
Balcony / Outdoor
Grout Type
Polymer-modified cement grout (weather-resistant grade) or epoxy grout
Joint Width
5–8mm minimum
Colour
Neutral tones — outdoor grout discolours from weathering; mid-tones show this less
Sealing
Mandatory for cement grout — outdoor grout exposed to monsoon needs sealing before first rain season; reapply annually
Notes
Wider joints are essential outdoors — thermal expansion of tiles in hot Indian summers causes cracking if joints are too narrow
Staircase
Grout Type
Polymer-modified cement grout
Joint Width
3–5mm
Colour
Dark tone preferred — staircases accumulate dirt at grout lines; dark grout requires less visible cleaning
Sealing
Recommended — stair tread grout exposed to shoe dirt and outdoor contamination
Notes
Grout at stair nosing edge must be fully filled and compacted — any void at the nosing edge collects grit that abrades the tile edge
Common Grout Defects and Causes
Grout defects are almost always caused by incorrect application technique, insufficient curing time, wrong product selection, or incompatible grout and tile combinations. Understanding the cause of each defect allows correct diagnosis and remediation.
Defects
Grout cracking (hairline or wider)
Causes
- Joint filled too shallowly — grout in a thin layer has insufficient cross-section to resist thermal and mechanical stress
- Unsanded grout used in joints wider than 3mm — excess shrinkage during drying
- Substrate movement — tile not fully bonded; hollow spots behind tiles flex under load and crack the grout
- No movement joint provided — thermal expansion of tile field has no relief; stress concentrates in the grout joint
Remedy
Remove cracked grout using a grout saw or oscillating tool; identify and resolve the underlying cause; regrout with appropriate product and joint width
Grout colour variation (uneven colour in same joint run)
Causes
- Different water-cement ratios in successive mixes — adding too much water dilutes the pigment
- Uneven drying rate — some areas in direct sun dry faster and appear darker
- Grouting over incompletely cured adhesive — moisture migration changes grout colour locally
- Different application pressure or sponge water content across the floor
Remedy
Consistent mixing ratio from the same batch; consistent sponge moisture during cleaning; avoid direct sun on fresh grout; cure uniformly
White haze / efflorescence on grout surface
Causes
- Calcium compounds migrating to the grout surface during drying — natural in cement grout; usually washes off after first wet season
- Using too much water when cleaning fresh grout — excess water dilutes and brings cement to the surface
- Grouting over wet substrate — moisture forces calcium through the joint
Remedy
Light acid wash (dilute white vinegar, 1:4 with water) after grout has cured for 28 days; do not use strong acid on natural stone tiles
Pinholes or voids in grout joints
Causes
- Insufficient packing of grout into the joint during application — the float did not work the grout fully into the joint depth
- Air trapped in the grout joint — especially common in deep joints
- Grout applied at incorrect consistency (too dry) — did not flow into joint corners
Remedy
Remove loose grout; dampen joint; regrout with correctly mixed grout at correct water-cement ratio; work the float firmly into the joint at multiple angles
Mould growth (black spots in bathroom grout)
Causes
- Unsealed cement grout absorbs water — permanently damp grout supports mould growth
- Poor bathroom ventilation — water vapour condenses on grout surface
- Grout colour too light — mould visible on white or light grey grout earlier than on dark grout
Remedy
Clean with dilute bleach (1:3 bleach:water); allow to dry fully; seal with penetrating grout sealer; improve ventilation; or replace cement grout with epoxy grout in severely affected areas
Grout staining (permanent discolouration)
Causes
- Unsealed cement grout in kitchen or wet area absorbs oil, turmeric, food acids, and cleaning chemicals
- Incorrect sealer application — sealer applied to wet grout does not penetrate and flakes off, leaving grout unprotected
Remedy
Heavy staining on unsealed cement grout is difficult to reverse — professional steam cleaning followed by resealing; or remove and replace with epoxy grout in permanently stained areas
IS Standards for Tile Grout
Indian and international standards relevant to tile grout cover product specifications, application codes, and performance testing.
Standards applicable to tile grout in Indian construction
| Standard | Title | Relevance |
|---|---|---|
| IS 1443:1972 | Code of Practice for Laying and Finishing of Tile Flooring | Primary installation standard — covers joint widths, grouting sequence, curing, and application requirements for all tile types |
| IS 15477:2019 | Adhesives for Tiles — Specification | Covers polymer-modified adhesive and grout materials — referenced alongside grout selection for wet areas |
| ISO 13007-2:2013 | Ceramic Tiles — Grouts and Adhesives — Part 2: Test Methods for Grout | International test standard for grout — flexural strength, compressive strength, water absorption, shrinkage; referenced by premium product manufacturers |
| ISO 13007-3:2017 | Grouts for Tiles — Definitions and Specifications | Defines CG1 (standard cement grout), CG2 (improved cement grout), and RG (resin/epoxy grout) classifications — useful for understanding import product specifications |
| IS 2645:2003 | Specification for Integral Waterproofing Compounds | Relevant when polymer modifiers are added to cement grout for wet areas — governs admixture compatibility with cement |
Classification
Title
ISO 13007-3 Grout Classification Reference
Detail
Imported grout products and premium domestic grouts often use ISO classification on packaging:
Classes
Code
CG1
Meaning
Standard cement grout — meets basic performance criteria
Code
CG2
Meaning
Improved cement grout — better abrasion resistance, shrinkage, and water absorption than CG1
Code
CG2W
Meaning
Improved cement grout with reduced water absorption
Code
CG2A
Meaning
Improved cement grout with high abrasion resistance
Code
RG
Meaning
Resin (epoxy) grout — meets performance criteria for chemical resistance, strength, and water impermeability
Related calculators
Use these calculators when you need to turn this reference information into project quantities:
- Grout Calculator
Estimate grout quantity based on tile size, joint width, and tiling area.
- Tile Calculator
Estimate tiles required, boxes, wastage, and cost for floor and wall tiling.
- Tile Adhesive Calculator
Calculate tile adhesive quantity for floor and wall tiling.
- False Ceiling Calculator
Estimate false ceiling materials and area.
Related resources
- Epoxy Grout vs Cement Grout
Detailed comparison of epoxy grout and cement grout for Indian tile installations — covering performance, cost, application difficulty, chemical resistance, maintenance, and a room-by-room guide to help you decide when epoxy grout is worth the higher cost and when cement grout is sufficient.
- Ceramic Tiles vs Vitrified Tiles vs Porcelain Tiles
Clear comparison of ceramic, vitrified, and porcelain tiles for Indian homes — covering manufacturing differences, water absorption, strength, PEI ratings, slip resistance, cost, and a room-by-room selection guide with IS 15622 classification reference.
- Floor Tiles Complete Guide for Indian Homes
Complete floor tiles reference for Indian homes — covering tile types, sizes, materials, PEI ratings, anti-slip ratings, substrate preparation, adhesive vs. cement bedding, grout selection, layout patterns, IS standards, room-by-room specifications, and installation quality checks.
- How to Calculate Number of Tiles Required
Step-by-step guide to calculating the number of tiles required for floors and walls — covering area measurement, layout-based calculation, tiles per m² reference, edge cut tiles, wastage, box quantities, and worked examples for rooms, bathrooms, and complete house tiling in India.
- Tile Wastage Percentage Guide
Complete guide to tile wastage percentages for Indian construction — covering wastage by layout pattern, tile size, room size, tile material, and installation method, with a quick-reference wastage selector table, explanation of what drives wastage, and guidance on retaining tiles after installation.