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Glossary of Terms

Glossary is usually defined as an alphabetical list of technical terms in some specialized field of knowledge. This knowledge base glossary provides a collection of knowledge base documents that define many technical terms. These terms are arranged alphabetically, but you can quickly jump to a specific term by selecting its first letter from the index of the knowledge base glossary below.

NATURAL BED
The setting of the stone on the same plane as it was formed in the ground. This generally applies to all stratified materials
NATURAL CEMENT
Lime with high clay content
NATURAL CLEFT
This generally pertains to stones which are formed in layers in the ground. When such stones are elevated or separated along a natural seam, the remaining surface is referred to a natural cleft surface. Non-manmade finish of stone with foliation, such as slate, certain sandstones and schistose rocks. The finish is obtained by de-lamination of the layers of the stone along its foliation
NATURAL STONE
Although technically a redundancy, as stone is naturally occuring by definition, the term is used to distinguish true stone from imitation materials.
NEAT CEMENT
A pure cement uncut by a sand admixture. Obtained by planning the stone with a planer tool in which irregular nicks have been made in the cutting edgeObtained by planning the stone with a planer tool in which irregular nicks have been made in the cutting edge
NEGATIVE LIP
When a factory-finished tile (or whatever different cut of stone) is installed lower in relation of at least three other surrounding tiles
NOMINAL DIMENSION
A dimension greater than a specified masonry dimension by the thickness of a mortar joint
NON-COMBUSTABLE
Any material that will neither ignite nor actively support combustion in air at a temperature of 1.200’F when exposed to fire
NON-CORRODING
Resistant to harmful oxidation or other corrosive actions because of its composition (i.e. stainless steel, bronze, copper)
NON-FERROUS
Not containing iron material
NON-STAINING MORTAR
A mortar with a low free-alkali content to avoid efflorescent or staining by adjacent stones migration of soluble materials
NOSING
The rounded front edges of a stair tread