Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
---
title: Wall Coverings
…79 unchanged lines
- Full-repeat samples, minimum 13 in. × 13 in.
- Cut-sheet and quantity takeoff with waste factor
−default: [Product data (use type, weight, width, repeat, washability), Approved adhesive list per product, ASTM E84 flame spread / smoke developed report, Full-repeat samples, minimum 13 in. × 13 in., Cut-sheet and quantity takeoff with waste factor]
+default:
+ - "Product data (use type, weight, width, repeat, washability)"
+ - "Approved adhesive list per product"
+ - "ASTM E84 flame spread / smoke developed report"
+ - "Full-repeat samples, minimum 13 in. × 13 in."
+ - "Cut-sheet and quantity takeoff with waste factor"
```
…27 unchanged lines
- Executed manufacturer and installer warranties
- Attic-stock delivery record (product, color, dye lot, quantity)
−default: [Executed manufacturer and installer warranties, Attic-stock delivery record (product, color, dye lot, quantity)]
+default:
+ - "Executed manufacturer and installer warranties"
+ - "Attic-stock delivery record (product, color, dye lot, quantity)"
```
…79 unchanged lines
### Natural-fiber wall covering shall not be installed in rated corridors, exits, or other locations requiring Class A or Class B interior finish unless tested data demonstrates the required class for the specific product and mounting.
−## Backing porosity governs adhesive selection and seam behavior; woven backings, non-woven backings, paper backings, and acrylic backings each behave differently and shall be matched to the adhesive. {note}
+## Backing porosity governs adhesive selection and seam behavior; woven backings, non-woven backings, paper backings, and acrylic backings each behave differently and shall be matched to the adhesive.
```datasheet
…45 unchanged lines
```
−## Straight-match goods are commonly under-ordered because the repeat consumes material at every drop; allow 10 to 15 percent waste for straight match and 15 to 25 percent for drop match, and require the cut-sheet before material is ordered. {note}
−
```datasheet
label: Waste Allowance
…6 unchanged lines
```
+## Straight-match goods are commonly under-ordered because the repeat consumes material at every drop; allow 10 to 15 percent waste for straight match and 15 to 25 percent for drop match, and require the cut-sheet before material is ordered. {note}
+
# Fire Performance {toc}
…68 unchanged lines
# Adhesives and Seam Treatment {toc}
−## Adhesive shall be matched to the product weight, backing porosity, and substrate; some vinyl backings are incompatible with high-solids clay adhesives, which causes telegraphing or delamination, so the manufacturer's approved adhesive list governs. {note}
+## Adhesive shall be matched to the product weight, backing porosity, and substrate; some vinyl backings are incompatible with high-solids clay adhesives, which causes telegraphing or delamination, so the manufacturer's approved adhesive list governs.
### The adhesive shall be a type recommended in writing by the wall covering manufacturer for the specific product, backing, and substrate.
…12 unchanged lines
```
−## Clay-acrylic adhesives have an open time of roughly 20 to 30 minutes and a set-up time of roughly 30 to 45 minutes; hanging shall stay within the open-time window to develop bond and avoid dry-back at seams. {note}
+## Clay-acrylic adhesives have an open time of roughly 20 to 30 minutes and a set-up time of roughly 30 to 45 minutes; hanging shall stay within the open-time window to develop bond and avoid dry-back at seams.
```datasheet
…28 unchanged lines
# Substrate Preparation {toc}
−## Smooth-face and low-texture coverings telegraph every surface imperfection; the required gypsum finish level must be explicitly specified or it will not be provided, and the installed covering will reveal joints, fasteners, and trowel marks. {note}
+## Smooth-face and low-texture coverings telegraph every surface imperfection; the required gypsum finish level must be explicitly specified or it will not be provided, and the installed covering will reveal joints, fasteners, and trowel marks.
## A Level 4 gypsum finish is the minimum acceptable substrate, and a Level 5 finish is required under smooth-face and low-sheen products; the finish work itself is performed under [[sync/gypsum-board-assemblies]]. {note}
…33 unchanged lines
# Moisture and Vapor Control {toc}
−## Non-permeable vinyl installed over below-grade or cold exterior walls traps moisture behind the facing and promotes mold; the wall assembly's vapor drive must be assessed before a non-permeable facing is accepted on such walls. {note}
+## Non-permeable vinyl installed over below-grade or cold exterior walls traps moisture behind the facing and promotes mold; the wall assembly's vapor drive must be assessed before a non-permeable facing is accepted on such walls.
### Non-permeable wall covering shall not be installed over assemblies subject to active inward vapor drive, including below-grade walls and uninsulated exterior walls, unless a vapor-drive analysis demonstrates acceptable performance.
…28 unchanged lines
# Environmental and Service Conditions {toc}
−## Wall covering shrinks if hung in conditions that differ from service conditions, opening seams after installation; material and space must be conditioned before and during installation. {note}
+## Wall covering shrinks if hung in conditions that differ from service conditions, opening seams after installation; material and space must be conditioned before and during installation.
### Wall covering rolls shall acclimate in the installation space at service temperature and humidity for a minimum of 24 hours before installation.
…23 unchanged lines
### Wall covering shall be trimmed cleanly at outlets, switches, and penetrations, with cutouts tight to device plates.
−## Coordination of termination conditions with the base, ceiling, and protection trades is frequently left undefined and causes field conflicts; the stop conditions shall be specified rather than left to the field. {note}
+## Coordination of termination conditions with the base, ceiling, and protection trades is frequently left undefined and causes field conflicts; the stop conditions shall be specified rather than left to the field.
### Wall covering shall terminate at the top of the resilient base and at the ceiling line.
…68 unchanged lines
default: 5
```