Tiles are classified under the Porcelain Enamel Institute (PEI) ratings system for suitability for fixing in a particular area. PEI Class III is for residential light to moderate traffic. PEI Class IV are for residential floors, moderate traffic areas like bathrooms, halls, kitchens and conservatories. Class V are for all residential floors and medium traffic commercial areas.
Friday 13 March 2015
Moisture Absorption Rating for Tiles
The American National Standards Institute (ANSI) has developed a rating for moisture absorption for tiles. If moisture penetration is too high, some tiles may crack. Tiles with W.A. Ratings of 0.5% or less are regarded as impervious. 0.5% to 3% is regarded as vitreous.
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