# Vitrified Tile — Full Body, GVT and Double Charge

> Vitrified tile is pressed ceramic tile fired to low porosity, so its body vitrifies into a dense, largely impervious mass. Full body tile carries its colour through the whole thickness for heavy traffic, double charge has a thick pigment wear layer, and glazed vitrified tile (GVT) has a printed glaze that allows any pattern but can wear through.

## What it is

**Pressed ceramic tile fired to low porosity**, where the body vitrifies into a
dense, largely impervious mass. The standard hard floor finish in Indian
commercial and residential construction.

## The types

| Type | Wear surface | Best use |
| --- | --- | --- |
| **Full body** | Through the thickness | Heavy traffic, industrial, commercial |
| **Double charge** | Thick pigment layer | General commercial, corridors |
| **Glazed (GVT)** | Printed glaze | Design-led areas, moderate traffic |
| **Polished** | Polished surface | Dry lobbies only — slip risk |

## Specification at a glance

| Property | Typical specification |
| --- | --- |
| Standard | IS 15622, or EN 14411 group BIa |
| Water absorption | Below 0.5% |
| Slip rating | R-class stated for wet areas |
| Format | Up to 1200 × 2400mm in large formats |
| Rectification | Rectified edges for narrow joints |
| Thickness | 8mm — 12mm typical for floors |

## What the specification must state

Tile type, not just size and colour · water absorption class · **slip rating
per area** · rectified or non-rectified edges · joint width, since rectified
tiles allow narrow joints but demand a flatter substrate · adhesive class and
coverage requirement · movement joint positions.

## Where projects go wrong

- **Polished tile at entrances.** It is dangerous when wet.
- **GVT in heavy traffic**, wearing through the glaze in lanes.
- **Dab-fixed large formats**, leaving voids that crack under point loads.
- **Movement joints omitted** across large floor areas, so tiles tent and pop.
- **Batch and shade variation** not checked before laying.

## Standards referenced

Pressed ceramic tile specification under **IS 15622** and **EN 14411**. Slip
resistance classification per **DIN 51130** practice.

## Frequently asked questions

### What is the difference between full body, double charge and GVT?

Full body carries the same colour and composition through the entire thickness, so wear never reveals a different layer — the right choice for heavy traffic. Double charge has two layers of pigment pressed together, giving a thick wear surface at lower cost. Glazed vitrified tile has a printed glaze on a vitrified body, which allows any pattern but wears through eventually where traffic is heavy.

### What slip rating is needed in wet areas?

Anywhere water reaches the floor — washrooms, lobby entrances during monsoon, pool surrounds, kitchens — needs a rated anti-skid finish, commonly R10 or R11 under the DIN 51130 classification. Polished vitrified tile in an entrance lobby is one of the most common avoidable safety hazards in Indian commercial buildings, because it looks impressive dry and becomes dangerous the moment it rains.

### Why do large format tiles need special attention?

Because tolerance stacks up. A 800×1600mm tile on a slightly uneven screed will lip at the edges, and lippage is far more visible and more of a trip hazard on large formats. They need a flatter substrate, a suitable adhesive applied with full back coverage rather than dabs, and often a levelling clip system during laying.

## Sources

- [IS 15622](https://standards.bis.gov.in/website/published-standards/department-wise) — Pressed ceramic tiles — specification
- [EN 14411](https://standards.cencenelec.eu/ords/f?p=CEN:105) — Ceramic tiles — definitions and classification
- [IS 15622 / DIN 51130](https://standards.bis.gov.in/website/published-standards/department-wise) — Slip resistance classification

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Source: https://hagerstone.com/materials/vitrified-tile