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- Natural Bed
The setting of stone parallel to how it was found in the quarry.
- Natural Cleft
Stone that has been separated at a natural seam which is said to have a natural cleft surface.
- Nominal Dimension
A measuring of flooring that includes the recommended joint size. The actual size of the tile or piece of flooring may be smaller.
- Non-Slip Tile
Tile that is resistant to objects slipping or sliding across.
- Non-Vitreous Tile
Tile that is not very resistant to moisture and has absorption rates over 7%.