What is the acceptable water absorption limit for Kota stone?

The water absorption should not exceed 1.5% by weight to ensure durability and prevent moisture-related damage.

Does IS 1130 detail the testing procedures?

No, it is a specification code. Testing procedures for compressive strength and water absorption refer to IS 1121 and IS 1124 respectively.

What are the common finishes acceptable under this code?

Stones can be supplied with a natural cleft finish, rough machined, or polished finish, depending on the requirement specified by the purchaser.

IS 1130

: 1969

Kota Stone (Limestone) - Specification

CurrentFrequently UsedSpecificationBIMArchitectural · Flooring and Paving

Download PDF BIS Portal Google

This standard lays down the specifications for Kota stone (a hard, compact limestone) used for flooring, facing, and paving. It defines acceptable dimensions, physical properties, and tolerances to ensure structural and architectural quality during construction.

Specifies requirements for Kota stone (limestone) used as building material, including physical characteristics and quality.

Quick Reference Values

Water absorption (maximum)1.5%

Standard thickness range15 mm to 40 mm

Tolerance on length and width (machine-cut)± 2 mm

Tolerance on length and width (hand-cut)± 5 mm

Tolerance on thickness± 2 mm

Practical Notes

Always specify whether you need machine-cut or hand-cut edges, as the dimensional tolerances differ significantly (±2mm vs ±5mm).

Kota stone slabs must be thoroughly inspected on-site to ensure they are free from cracks, deleterious veins, and signs of weathering or flaking.

For heavy-duty industrial or commercial flooring, ensure adequate thickness (typically 30mm to 40mm) is specified and supplied.