Most attributes of floor tiles do not have binaries. You would find it difficult to classify tiles as porous and nonporous. This is because there are varying levels of porosity. Likewise, it is not easy to call a tile hard or soft as it will have a certain degree of hardness. It can be classified in any of the five groups of hardness, which is widely accepted by the industry and consumers. The antiskid attribute or slip resistance of floor tiles is similar. You cannot call a tile slippery or completely slip resistant. The attribute will vary in its efficacy depending on the material, size, treatment and installation. Let us explore the antiskid attribute or slip resistance of floor tiles.
The first influencing factor is the primary material a tile is made of. Some materials are naturally more slippery. This is because of the coefficient of friction. A material needs to have substantially higher coefficient of friction to be antiskid or naturally slip resistant. A fine example is slate. Another fine example is natural hardwood, not one that has been processed and treated to sport a splendorous sheen which is a dead giveaway that the surface is smoother than it has to be. An extremely smooth surface cannot be naturally slip resistant unless it has been treated in a specific manner.
A surface has to be slightly uneven to allow tiny air holes that would facilitate friction. The unevenness may not be visible to the naked eye. These could be microscopic aberrations on the surface, just to facilitate a firmer grip. The problem with such a simple explanation is that the surface may still be slippery when it is submerged or moist. Water does strange things to different materials. You need your floor tiles to be particularly slip resistant in the bathrooms, kitchens and utility areas.
You must choose an antiskid treatment. Different materials are treated in relevant ways to add an antiskid layer on top of the tile. Some tiles are textured or patterned in a way that enables them to have an uneven surface. The unevenness assures a firm grip and hence it becomes antiskid. Many experts recommend small floor tiles as opposed to larger ones. Smaller tiles will have more grouts and these would act as an obvious antiskid treatment. You may go for a combination of small tiles with special textures or patterns and antiskid treatment for optimum slip resistance.