Marble
Types and Durability
| Description
Marble (Metamorphic stones) |
Expected Lifespan
(Years) |
Adjustment Factors |
| General | ||
| Natural Marble specified under Group A. Performance and specification to be confirmed with supplier. | 35+ | Quality relies on preservative or water repellent: -30% years
Contact with soluble salt: -30% years Constantly contact/ immersed in water or exposed to extreme moisture: -15% years High possibility exposed to reactive chemical: -15% years Test certificate from local approved testing authority (including porosity, crystallization, etc) for specific batch delivered to site: +15% years |
| Natural Marble specified under Group B. Performance and specification to be confirmed with supplier. | 35+ | |
| Natural Marble specified under Group C. Performance and specification to be confirmed with supplier. | 35+ | |
| Natural Marble specified under Group D. Performance and specification to be confirmed with supplier. | 35+ | |
| Unclassified, i.e. natural marble neither specified nor in above groups | < 35 | None |
In the case of 2 or more condition of adjustment factor occur, the percentage of year shall be added to obtain the durability value.
Refer to durability calculator
Note: Marble Institute of America (MIA) has classified marble into 4 groups. The basis of this classification is the characteristics encountered in fabricating and has no reference whatsoever to comparative merit or value.
Group A: Sound marbles with uniform and favourable working qualities.
Group B: Consist of marble similar to group A but with less favourable working properties. They have occasional natural faults, and a limited amount of repair is needed.
Group C: Marbles with uncertain variations in working quantities. They contain flaws, voids, veins, and lines of separations and always require repairing.
Group D: Similar to Group C, but with a larger proportion of natural variations and with maximum variation in working qualities. [1]