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FAQ: QUESTIONS AND ANSWERS

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1. WHAT IS THE DIFFERENCE BETWEEN NATURAL, TEXTURED, POLISHED, HONED AND GLAZED SURFACES?

Tile surfaces differ in their visual and tactile characteristics.

  • A natural surface may be smooth and matt, or slightly textured;
  • a textured (or also bush-hammered) surface has all the characteristics of a natural split stone: unevenness, sandy effect, ridges and dips;
  • a honed surface is shiny because it is polished by a mechanical procedure which does not remove any material;
  • a polished surface is even shinier because it is given a mirror-smooth finish in a process that removes up to 1 mm of material from the pressed surface.

A glazed surface is coated with a thin layer of vitreous material that gives it its colour and shin.

2. WHAT IS THE DIFFERENCE BETWEEN RECTIFIED AND UNRECTIFIED TILES?

Rectification is a process carried out on the edge of the tile. The edges are ground by a mechanical process that leaves them straight and perpendicular, and ensures all the tiles are the same size, allowing laying with a minimum recommended joint of 2 mm; unrectified tiles have natural press-formed edges and have to be laid with wider joints.

3. WHAT IS THE DIFFERENCE BETWEEN PORCELAIN STONEWARE AND WHITE BODY TILES?

Tiles can be produced using different technologies and different materials. Porcelain stoneware is a compact material with low porosity, ideal as an indoor floor covering and outdoor paving because it is very tough and frostproof. Single-fired white-body tiles are not frost-resistant and are therefore used as indoor wall coverings.

4. WHAT IS LEED? WHAT IS ITS IMPORTANCE?

LEED is a certification system for the design, construction and operation of high-performance sustainable buildings. The user of certified tiles generates Leed credits, adding to a building’s sustainability status. For full information visit the Green Building section of the site.

5. WHERE CAN I PURCHASE ITALGRANITI GROUP PRODUCTS?

Italgraniti Group is based at Modena in Italy, but it has dealers, distributors and experts all over the world. Fill in the form if you would like one of our experts to contact you.

6. WHAT IS THE DIFFERENCE BETWEEN INDOOR AND OUTDOOR TILES?

It is important for all tiles to be resistant to stains and chemicals. However, an outdoor tile must have different characteristics from an indoor one because it comes into direct contact with the weather.

For outdoor laying, the tile must be frostproof like porcelain stoneware and must have a highantislip coefficient.

For indoor laying, on the other hand, glazed porcelain stoneware and white-body tiles can also be used; in these situations, appearance factors are also a priority, as well as the product’s technical characteristics.

7. HOW CAN I CHOOSE THE BEST TILE FOR MY REQUIREMENTS?

Every laying context is different: is it indoors or out? Is it a commercial or residential building? Will the tiles be laid on the floor or walls? Contact one of our experts or visit one of our points of sale for free advice and to discover the best solution for your needs.

8. WHAT IS SHADE VARIATION?

Every tile has its own shade of colour. The degree of shade variation expresses the level of uniformity of colour between the tiles in the same series and ranges from level V1 (highly uniform colour) to level V4 (large degree of variation).

Shade variation is a valued appearance feature in a series, deriving from the original material that inspires it (e.g. in nature marbles have a high degree of variation, while sands are very uniform in colour).

It should also be added that the colour shade varies between production lots over time, since it is the outcome of firing in kilns at over 1200°C.