Natural Stone Tile
Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
Showing changes from Rev 6
to Rev 7
in Natural Stone Tile.
---
title: Natural Stone Tile
…178 unchanged lines
### The service environment determines the stone type and finish, the freeze-thaw suitability, the slip-resistance requirement, the membrane requirement, the setting and grouting materials, and the sealing regimen. {note}
+### The service environment shall be established for each stone location before materials are selected.
+
```datasheet
label: Service Environment
…8 unchanged lines
default: "Interior dry — floors and walls not regularly wetted"
```
−
−### The service environment shall be established for each stone location before materials are selected.
### Calcareous stone in freeze-thaw exterior service shall be used only where the specific stone has demonstrated freeze-thaw durability.
### The Contractor shall confirm the service classification for each location from the contract documents before selecting materials.
…46 unchanged lines
### The stone type and its governing ASTM specification determine the service environment, the freeze-thaw suitability, the strength, the absorption and staining behavior, the moisture sensitivity, the appropriate finishes, and the maintenance regimen. {note}
+### The stone type shall be selected for the use, traffic, exposure, and maintenance expectations of each space, shall be identified by both commercial and geologic name and quarry source, and shall be indicated in the [[drawing: stone schedule]].
+
```datasheet
label: Stone Type
…10 unchanged lines
default: "Marble (ASTM C503) — calcareous metamorphic; interior floors and walls"
```
−
−### The stone type shall be selected for the use, traffic, exposure, and maintenance expectations of each space, shall be identified by both commercial and geologic name and quarry source, and shall be indicated in the [[drawing: stone schedule]].
### Each stone shall comply with its governing ASTM dimension-stone specification (C503, C568, C615, C616, C629, C1526, or C1527) and shall be certified by measured physical properties.
### Stone used in exterior, freeze-thaw, or submerged service shall be a dense, low-absorption stone demonstrated to be durable in that service.
…42 unchanged lines
### The stone form and thickness determine the setting method, the substrate flatness requirement, the handling, and the joint and lippage control. {note}
+### The stone form shall be specified, since it determines the setting method, substrate flatness requirement, and joint and lippage control for the installation.
+
```datasheet
label: Stone Form
…28 unchanged lines
### The finish affects appearance, slip resistance, cleanability, maintenance, and durability. {note}
+### The finish shall be selected for the stone, the service, and the slip-resistance requirement, and shall be consistent with the approved mock-up.
+
```datasheet
label: Surface Finish
…10 unchanged lines
default: "Honed — smooth matte (interior floors and walls, general)"
```
−
−### The finish shall be selected for the stone, the service, and the slip-resistance requirement, and shall be consistent with the approved mock-up.
### Polished finishes shall not be used on wet floors or sloped surfaces where the slip-resistance requirement cannot be met.
### A polished finish maximizes color and reflectivity but minimizes slip resistance and is best reserved for walls, countertops, and low-traffic feature floors, a honed finish is the general-purpose floor and wall finish, flamed and brushed finishes are the standard for granite floors and exterior paving, and cleft finishes occur naturally on slate and some quartzite. {note}
…215 unchanged lines
### The sealant shall be a non-staining sealant compatible with the stone, verified non-staining on the specific stone where the joint is in contact with absorptive stone.
### The sealant or profile shall be capable of the movement the joint will see.
−### A movement-joint sealant must adhere only to the two joint faces so it can stretch and compress freely, because bonding to the joint bottom restrains and tears it, and many common sealants bleed plasticizers that stain absorptive stone, so a sealant tested non-staining on the specific stone is required. {note}
+### A movement-joint sealant must adhere only to the two joint faces so it can stretch and compress freely, because bonding to the joint bottom restrains and tears it, and many common sealants bleed plasticizers that stain absorptive stone, so a sealant tested non-staining on the specific stone is required.
# Substrate Preparation {toc}
…129 unchanged lines
### Stone is a natural material whose properties vary across a quarry; verification testing of the actual supplied lot guards against substitution of a weaker or more absorptive stone than was certified. {note}
+### Where required by the contract documents or where the stone source is unverified, samples of the supplied stone shall be tested by an independent laboratory for the physical properties of the governing ASTM specification (absorption per ASTM C97, compressive strength per ASTM C170, flexural strength per ASTM C880 or modulus of rupture per ASTM C99, and abrasion per ASTM C1353 for floor stone) to confirm that the delivered stone meets the certified values.
+
```datasheet
label: Independent Stone Property Verification
…5 unchanged lines
```
−### Where required by the contract documents or where the stone source is unverified, samples of the supplied stone shall be tested by an independent laboratory for the physical properties of the governing ASTM specification (absorption per ASTM C97, compressive strength per ASTM C170, flexural strength per ASTM C880 or modulus of rupture per ASTM C99, and abrasion per ASTM C1353 for floor stone) to confirm that the delivered stone meets the certified values.
−
# Cleaning, Sealing, and Protection {toc}
…77 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}