How Thick Should Porcelain Tile Be?

Porcelain Tile

• Porcelain tiles have a low moisture absorption rate. The tiles are frost-resistant, if not frost-proof. Use thicker porcelain tiles outdoors or indoor areas that get heavy foot traffic. Thinner porcelain tiles may be used for walls or counter tops. According to tile dealer Laticrete International, the thinnest tiles may be used in certain facade and interior flooring applications.

Porcelain vs. Ceramic Tile

• Ceramic tiles, which are usually made from white or red clays, are not as hard as porcelain tiles, so they are easier to cut. The moisture absorption rate of ceramic tiles is much higher than that of porcelain tiles. That makes ceramic tiles slippery when wet regardless of their thickness and unsuitable for outdoor use. Because they are not as hard as porcelain tiles, chipping and other damage occurs more frequently with ceramic tiles.

Through-Bodied Porcelain Tiles

• Also known as full-bodied tiles, through-bodied porcelain tiles are the same pattern or color throughout the thickness of each tile. This means the damage on a chipped tile will be less noticeable. Low maintenance through-bodied tiles suit commercial or residential use, as they stand up to hard use. Apply sealer on the grouting for additional protection for these tiles.

Glazed Porcelain Tiles

• Glazed porcelain tiles, also known as vitreous tiles, get a thin glass coating before entering the kiln. The thickness doesn't matter much since they are usually used for walls and counter tops. The glazing makes them slippery, so they are not a good choice to use as flooring. The glazing is only on the surface, so any cracks or chips will be apparent. The coating makes the tiles stain-resistant and easy to clean.