Grade-2 refers to natural stone materials with minor defects, such as scratches and irregular surfaces.Grade-1 refers to natural stones with higher quality and uniform material.The grade refers to the size, shape, thickness, and condition of the surface. Grade of Natural Stones for FloorsĪ standard grade system is used to rate the quality of natural stone floor materials. Whereas, travertine, limestone, and slate have a medium rate of water absorption. They are highly recommended for high-traffic commercial applications.Īmong different types of natural stones, sandstone is the most porous natural stone, while granite is least pervious to water absorption. Impervious Stones: These stones can resist the absorption of liquids and are easy to maintain. Vitreous Natural Stones: These stones have a standard absorption rate for flooring tiles and are recommended for low to mid-traffic applications indoors and outdoors. Semi-Vitreous Natural Stones: These are less absorbent, and their maintenance increases with their exposure to liquids. Non-Vitreous Natural Stones: These are natural stones with a high absorption rate and are not recommended for damp environments. The rate of absorption of water can be decreased by polishing the floor.īased on the rate of absorption, natural stone tiles can be classified into the following types: The higher the absorption rate, the higher is its susceptibility to staining and cracking under freezing conditions. The rate of absorption of the natural stone shows how porous the stone is. Rate of Absorption of Natural Stones for Floors The essential properties of natural stones that need to be considered while choosing natural stones for a specific purpose are:ġ. This article explains the essential properties, benefits, and drawbacks of natural stones that should be considered for different site conditions. The suitability of natural stones for a specific location is decided by understanding their characteristics and features.
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