Ceramic vs vitrified vs porcelain tiles explained: IS 15622 water-absorption groups, strength data, Indian prices per sq ft and room-by-room buying advice.
Quick answer
Put ceramic tiles on walls, put vitrified (porcelain) tiles on floors, and pick the vitrified sub-type — soluble salt, double charge, GVT/PGVT or full body — based on how much traffic the floor will see.
Last updated: 26 July 2026 · By Puranmal Sons & Ceramix Syndicate, wholesale building-material distributor, Indore · Prices are indicative for mid-2026.
Think of tiles like biscuits with your morning chai. A plain soft biscuit soaks up chai the moment you dip it — that is a ceramic tile. Its body is porous, so it drinks in water, stays lighter and softer, and costs less. It is perfectly happy stuck on a wall, where nothing heavy ever presses on it.
Now imagine a biscuit baked so hard and glassy that chai just rolls off it. That is a vitrified tile. It is fired at a higher temperature until the ingredients partly melt and fuse into a dense, glass-like body. Because almost no water can enter it, it is much harder to crack, does not stain easily, and shrugs off footfall, furniture and dragged luggage. That is why vitrified tiles go on floors.
And porcelain? In India, "porcelain" and "vitrified" are mostly two names for the same hard, glassy biscuit. Internationally the word is "porcelain"; in the Indian market the same low-absorption tile is sold as "vitrified". The label matters less than one number printed on the box: water absorption.
One-sentence verdict: put ceramic tiles on walls, put vitrified (porcelain) tiles on floors, and pick the vitrified sub-type — soluble salt, double charge, GVT/PGVT or full body — based on how much traffic the floor will see.
| Location / Use | What to Buy | Why |
|---|---|---|
| Bathroom and kitchen walls (dado) | Glazed ceramic wall tiles (BIII) | Light, cheap, easy to cut; walls carry no load so high absorption does not matter |
| Bedroom floors | Soluble salt or GVT vitrified | Low traffic; entry-level vitrified gives strength at the lowest cost |
| Living room, dining, passages | Double charge or PGVT vitrified | Daily family traffic and furniture need a thick wear layer or hard glaze |
| Bathroom and utility floors | Matt/anti-skid vitrified (or matt ceramic floor tile) | Low absorption plus a matt, higher-grip surface for wet feet |
| Balcony, terrace, parking, driveway | Full body or heavy-duty vitrified, matt finish | Chips stay invisible; near-zero absorption handles rain and load |
| Shops, showrooms, offices | Double charge or full body, PEI Class IV–V | Commercial footfall wears through printed surfaces quickly |
| Exterior cladding / elevation | Low-absorption tiles (E ≤ 3%) | Porous bodies absorb rainwater and can debond or crack |
Both ceramic and vitrified tiles start the same way: clay, feldspar, quartz and silica are milled, pressed into shape under high pressure, then fired in a kiln. The difference is the recipe and the firing. Ordinary ceramic tiles are fired at lower temperatures, so the body stays porous — full of microscopic air pockets that absorb water. Vitrified tiles use a body richer in feldspar and silica and are fired at around 1,200 °C, hot enough for the feldspar to melt and form a glassy (vitreous) phase that fills the pores and fuses the particles together. That process is vitrification. The result is a denser, heavier, harder tile — typically 2,200–2,400 kg/m³ — with water absorption below 0.5% against roughly 3–10% for common ceramic bodies.
Why does absorption matter so much? A porous body is a weaker body: water entering it weakens bonds, carries stains inward, and in cold climates freezes and expands, cracking the tile. Absorption is therefore the single number on which the entire international classification system is built.
The Indian standard for pressed tiles is IS 15622:2017 (Pressed Ceramic Tiles — Specification), which follows the same classification logic as the international standard ISO 13006:2018. Tiles are grouped by forming method — "A" for extruded, "B" for dry-pressed (virtually all Indian wall and floor tiles are dry-pressed, hence the B groups) — and by water absorption, E:
| Group (dry-pressed) | Water absorption (E) | What the trade calls it | Typical use |
|---|---|---|---|
| BIa | E ≤ 0.5% | Vitrified / porcelain | All floors, wet areas, outdoors, heavy traffic |
| BIb | 0.5% < E ≤ 3% | Semi-vitrified / fine stoneware | Floors with moderate duty |
| BIIa | 3% < E ≤ 6% | Ceramic floor tiles | Light-duty residential floors |
| BIIb | 6% < E ≤ 10% | Earthenware | Dry-area walls, very light duty |
| BIII | E > 10% | Glazed ceramic wall tiles | Walls only |
(Extruded groups AIa, AIb, AIIa, AIIb and AIII follow the same absorption bands for extruded bodies.) The supporting Indian standards are IS 13712 for definitions and classification and the IS 13630 series for test methods. When a datasheet says a tile "conforms to IS 15622, Group BIa", it is telling you the tile is fully vitrified. The ISI mark on a box indicates BIS-licensed manufacture to this standard.
Absorption groups come with matching mechanical requirements, and the gap between groups is large. Minimum values per ISO 13006 / EN 14411 annexes (tiles ≥ 7.5 mm thick):
| Group | Modulus of rupture (min. avg.) | Breaking strength (min.) |
|---|---|---|
| BIa (vitrified/porcelain) | 35 N/mm² | 1,300 N |
| BIb | 30 N/mm² | 1,100 N |
| BIIa | 22 N/mm² | 1,000 N |
| BIIb | 18 N/mm² | 800 N |
| BIII (wall tile) | 15 N/mm² | 600 N |
Read that table once and the wall-vs-floor rule stops being an opinion: a vitrified floor tile must survive more than twice the load of a glazed wall tile before snapping.
For glazed surfaces there is a second, separate rating: the PEI abrasion class, which measures how fast the glaze wears under foot traffic. Class 0–I suits walls only; Class II suits bathrooms and bedrooms with soft footwear; Class III suits kitchens, halls, corridors and balconies in homes; Class IV suits hotels, sales areas and light commercial floors; Class V is for heavy pedestrian traffic — shopping centres, airports, public areas. A tile can have a very hard body but a soft glaze, so for shops and offices check PEI, not just the group.
Frost resistance (tested over repeated freeze–thaw cycles per ISO 10545-12) effectively requires a low-absorption body, which is why only Group I tiles are specified for exposed exteriors in cold regions. Stain resistance follows the same logic: the less a body and surface absorb, the less they hold on to turmeric, oil or rust.
Within Group BIa, the Indian industry — centred on Morbi, Gujarat — sells several sub-types that differ in how the design is applied, not in the body underneath:
Brand examples, purely as market reference points: Kajaria's Eternity collection is its GVT flagship (with DuRock anti-skid variants for wet and outdoor areas), Somany sells GVT under the Duragres name, and Johnson's Marbonite (vitrified), Porselano (GVT) and Endura (heavy-duty/industrial) ranges map neatly onto the same family tree.
Internationally — Europe, the USA, ISO documents — a dry-pressed tile with E ≤ 0.5% is called a porcelain tile. In India, the very same Group BIa product is marketed as a vitrified tile. So when a showroom offers you "porcelain" at a premium over "vitrified", ask for the datasheets: if both state E ≤ 0.5% to IS 15622 / ISO 13006, they are the same class of product, and many brand datasheets quote absorption figures well below the 0.5% ceiling. The only honest differences are sub-type (full body vs glazed), finish, size and brand. Buy the number, not the noun.
A 3BHK flat in Indore (~1,000 sq ft of flooring plus ~300 sq ft of wall tiling). A sensible mixed specification: double charge or PGVT for the living-dining and passages (~450 sq ft at ₹50–80/sq ft ≈ ₹22,500–36,000); soluble salt or basic GVT in the three bedrooms (~360 sq ft at ₹30–60/sq ft ≈ ₹11,000–21,500); matt anti-skid vitrified in two bathroom floors and the utility (~90 sq ft at ₹45–60/sq ft ≈ ₹4,000–5,500); glazed ceramic on bathroom walls and the kitchen dado (~300 sq ft at ₹30–45/sq ft ≈ ₹9,000–13,500). Indicative material total: roughly ₹47,000–77,000 before laying — and note that the ceramic wall tiles, the cheapest line item, cover almost a quarter of the tiled area.
A shop floor on a busy market street. An 800 sq ft showroom seeing several hundred visitors a day needs PEI Class IV–V wear resistance and a body at 35 N/mm² modulus of rupture. Double charge at ~₹50–70/sq ft (≈ ₹40,000–56,000 material) gives a 3–4 mm wear layer; full body at ~₹80–110/sq ft (≈ ₹64,000–88,000) additionally hides chips from trolleys and dropped stock. A printed soluble-salt tile here would show wear paths at the entrance within a couple of years — the ₹20,000 saved up front becomes a full re-laying bill later.
The wall-tile-on-the-floor mistake. A homeowner extends leftover glazed ceramic wall tiles (Group BIII: absorption above 10%, breaking strength minimum only 600 N) onto a balcony floor. A washing machine and monsoon rain do the rest: water enters the porous body, the bed debonds, tiles sound hollow, and two crack under point loads within the first year. A BIa vitrified tile rated at 1,300 N and E ≤ 0.5% would have cost perhaps ₹15–25 more per sq ft — far less than redoing the balcony.
Ex-showroom rates per sq ft (indicative, mid-2026, may vary by brand, size, finish and quantity):
| Tile family | Indicative price (₹/sq ft) | Notes |
|---|---|---|
| Glazed ceramic wall tiles | 25–50 | 300×450 / 300×600 mm; walls only |
| Ceramic floor tiles | 30–60 | Light residential duty |
| Soluble salt vitrified | 25–60 | Entry-level vitrified flooring |
| Double charge vitrified | 35–95 | Thick wear layer; commercial value pick |
| GVT (matt/satin) | 40–140 | Digital wood/marble/stone designs |
| PGVT (polished glazed) | 45–150 | Glossy marble-look; nano finish ₹5–15 extra |
| Full body vitrified | 50–180 | Colour through thickness; heavy duty |
| Large-format slabs / premium imports | 150–800 | 800×1600 mm and above |
Laying cost note: budget separately for installation — typically ₹70–110 per sq ft including labour, adhesive and grout for standard formats, more for large slabs. Traditional sand-cement bedding is cheaper and still common for smaller ceramic tiles, but vitrified tiles absorb almost no water, so a plain cement slurry grips them poorly; polymer-modified tile adhesive is the appropriate fixing method for vitrified and any large-format tile, and for tile-on-tile work.
Vitrified, in almost every case. Its water absorption is below 0.5% against 3–10% for ceramic, and its minimum flexural strength (35 N/mm²) is roughly half again higher than a ceramic floor tile's (22 N/mm² for Group BIIa). Ceramic floor tiles remain acceptable for low-traffic, dry, budget-sensitive rooms.
In India, usually nothing but the name. Both refer to dry-pressed tiles with water absorption of 0.5% or less — Group BIa under IS 15622 and ISO 13006. "Porcelain" is the international trade name; "vitrified" is the Indian one. Compare datasheet E values, not labels.
Polished finishes (PGVT, mirror-polished double charge) can be slippery when wet; the body's hardness has nothing to do with grip. Matt, satin and purpose-made anti-skid vitrified tiles are available for bathrooms, balconies and parking. Choose finish by location, not by tile family.
Yes — they are heavier, so they need proper adhesive and, for large formats at height, mechanical support during setting. The reverse is not true: ceramic wall tiles must never go on floors. Many buyers use GVT planks and slabs on feature walls and full-height bathroom walls.
Different tools for different jobs. Double charge has a 3–4 mm solid design layer that outlasts printed surfaces, making it better for shops and high-traffic floors; GVT offers far richer designs (wood, marble, stone looks) under a glaze and suits homes. For heavy commercial wear with looks, consider full body or high-PEI GVT.
Check three things on the datasheet or box: conformity to IS 15622 (ISI mark where applicable) with the water-absorption group; modulus of rupture / breaking strength; and PEI class for glazed floor tiles. Physically, inspect a few tiles from the box for flatness (edge-to-edge on a level surface), consistent shade, and undamaged corners.
Puranmal Sons & Ceramix Syndicate is a third-generation wholesale distributor of tiles, sanitaryware and plumbing products, serving Indore, Dewas, Ujjain, Pithampur, Dhar and Mhow for over 40 years. As an authorised Kajaria Tiles dealer, we can show you ceramic, GVT, PGVT, double charge and full body options side by side, with datasheets, so you can match the right group and PEI class to each room and budget. Call 95845-04888 or visit us at 254, Jawahar Marg, Rajmohalla, Indore.
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