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Questions

 Frequently  Asked  Questions

American Marazzi

Have a question related to ceramic tile? Maybe you’re not the first who doesn’t know the answer. Many issues are common to the industry in general, so you may want to check out the list below to see whether the answer to your question is there. That way you’ll save a phone call to your Distributor, plus you’ll have the answer at your fingertips to apply to a personal installation or for your customer.

1) What do “shade” and “caliber” mean, and why do they matter?

2) My tile looks dull, why? My tile retains dirt, why?

3) Why doesn’t tile last forever? I’ve heard about the tile in European cathedrals and Oriental palaces that has been there for centuries. Why is American Marazzi Tile warranted for one year?

4) Will tile burn?

5) Why doesn’t the tile I purchased for my room addition match the tile (same series & color) I purchased last year?

 

1) What do “shade” and “caliber” mean, and why do they matter?

A tile’s shade (dye lot) refers to the coloration and reflectivity of a tile. A tile’s caliber refers to its facial dimension (size) and is measured with a tool called a caliper (often the terms are confused). American Marazzi Tile carefully selects its tile and indicates on every box the particular shade (dye lot) and caliber to offer customers consistency throughout an installation. Since natural materials are used in both the body and glazes of the tile, slight variations in shade and caliber are normally inherent from one production run to the next. Typically, American Marazzi Tile shades (dye lots) are indicated by a three-digit numeral (i.e. 289, 348, 423, etc.) while caliber sizes are normally shown as 07, 08, 09, etc.

It is important to purchase tile that has the same shade (dye lot) and caliber, if at all possible, to ensure a pleasing aesthetic appearance as well as consistent grout joints. Using different caliber sizes result in a variation in grout joint widths. Normally, with American Marazzi Tile products, two adjacent calibers (i.e. 07 with 08 or 08 with 09 - not 07 with 09) can be used in an installation if the installer is aware of the variation before the installation is begun because the slight difference can be adjusted within the grout joint. It is generally not acceptable to begin an installation with one size and abruptly change to another at some point.

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2) My tile looks dull, why? My tile retains dirt, why?

These questions are often interrelated. If the surface appearance of the tile differs significantly from uninstalled pieces left from the instalation there are several possible explanations.

The tile may appear dull if a grout haze remains on the surface of the tile. This often happens when the grout is not thoroughly cleaned from the tile surface immediately following installation. Since grout is a form of cement, it becomes very difficult to remove after drying completely. This can be avoided by grouting only manageable sections at one time and cleaning each well before moving on to other areas. This step is particularly important when working with textured, natural stone-like tile that feature crevices or clefts.

When grout remains on the surface, it attracts and holds dirt, thus making it impossible to restore the original sheen to the tile. Products exist in the marketplace to remove grout haze; these products often contain acids that can damage the surface of the tile. Since the surface of tile is essentially a layer of glass, it can be easily etched by acid. American Marazzi Tile does not recommend acid cleaning for any of our products (see Maintenance Procedures). Any effort to remove grout haze with an acid-based product should be cautiously undertaken by a professional contractor and utilized with extreme caution. Improper use of acids that etch the glaze also results in loss of light reflection and dirt retention that diminishes the sheen of a tile.

Additionally, normal wear and tear can result in scratches that, over time, retain dirt and reduce sheen. Culprits can be sand or gravel adhered to shoe soles, chairs or bar stools that are repetitively moved across a tile surface, children’s toys with abrasive finishes, loaded carts or other conveyances, etc. Always consider a tile’s durability classification when choosing a product for specific areas.

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3) Why doesn’t tile last forever? I’ve heard about the tile in European cathedrals and Oriental palaces that has been there for centuries. Why is American Marazzi Tile warranted for one year?

This question directly relates to question #3 above. A tile’s ability to withstand wear is determined by many factors, i.e. glaze composition, surface texture, traffic levels, maintenance procedures, etc. American Marazzi Tile’s standard limited warranty addresses the issue of a tile’s conformance to industry standards regulating First Choice products. Any variation from those standards would be evident within a one-year period.

You can bet that the tile in those ancient installations looks much different now than it did when it was installed. More than likely, the edges are chipped; the surface is scratched and worn (in many cases through to the body); there are impact chips and structural cracks - all of which may seem acceptable in an historic site but less so on your kitchen floor!

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4) Will tile burn?

Firing temperatures for ceramic tile products in general are 1800° F. American Marazzi Tile products are fired at temperatures greater than 2001° F.

There is no relevant test that relates ASTM E84.75, i.e. Steiner Tunnel Test, to measurement of performance of ceramic products for combustion, flame spread or toxicity. Maximum temperatures for conducting this test range only from 1202° F to 1562° F. It was developed to evaluate softer construction materials ranging from carpet to lumber because these products to ignite and may release deadly chemicals when burning. The fact that ceramic products actually originate at much higher temperatures renders such a test in the 1472° F range useless.

Tests conducted within the industry have shown bathrooms with tile tub surrounds that are left standing after the entire room has been burned.

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5) Why doesn’t the tile I purchased for my room addition match the tile (same series & color) I purchased last year?

Question #2 addresses this issue because such a situation is generally the result of receiving two different shades (dye lots) of tile that were produced at different times, possibly fired in different kilns, with slightly different glaze components. Many natural components are used to produce both the body and glaze on American Marazzi Tile products.

Each time raw materials for a glaze are obtained from a supplier, each time the components of the tile body are mixed, each time a tile is pressed and fired slight variations may result. Generally, this presents no problem because a customer receives the same shade (dye lot) for each purchase; however, in an installation that evolves over a period of time, it may not be possible to obtain the same shade as originally installed. In such an instance, be sure to request the original shade (dye lot). If not available, request a sample of current shades for comparison before purchase or installation.

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