---
title: Acoustic Insulation
…340 unchanged lines
- "4 in (4 in stud cavity, full fill)"
- "6 in (6 in stud cavity, full fill)"
− - "Per [[drawing: partition type schedule]]"
−drawing_ref: true
+drawing_ref: "partition type schedule"
default: "3-1/2 in (3-5/8 in stud cavity, full fill)"
```
…295 unchanged lines
- "6 ft each side"
- "Full ceiling area"
− - "Per [[drawing: plenum acoustic treatment plan]]"
−drawing_ref: true
+drawing_ref: "plenum acoustic treatment plan"
default: "4 ft each side (standard)"
```
…101 unchanged lines
- "ASTC ≥ STC – 3 (tight specification, high-performance work)"
- "NIC ≥ specified noise isolation class"
− - "Per [[drawing: acoustic acceptance criteria schedule]]"
−drawing_ref: true
+drawing_ref: "acoustic acceptance criteria schedule"
default: "ASTC ≥ STC – 5 (typical specification)"
```
…63 unchanged lines
### The Contractor shall document any conditions observed during installation that may affect the long-term performance of the insulation — evidence of water infiltration, inadequate climate control, or trades disturbing previously installed cavity insulation — and shall bring them to the Architect's attention before the cavity is closed.