---
title: Natural Stone Tile
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label: Minimum Mortar Coverage Beneath Stone
type: radio
−unit: %
+unit: '%'
options:
- "80% — interior dry floors and walls (durable stone)"
…135 unchanged lines
label: Attic Stock Quantity
type: range
−unit: % of installed area
+unit: '% of installed area'
options:
min: 2
…6 unchanged lines
## Spare stone shall be stored by the Owner in a dry, protected location on non-staining dunnage.
## Attic stock from the same block or lot is especially important for natural stone because later-quarried replacement stone will differ in color, vein, and shade and cannot be matched, and the spare material allows the Owner to repair damage with stone that matches the original installation. {note}