Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
---
title: Acoustic Wall and Ceiling Panels
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## Panels in spaces subject to sustained high humidity shall use a moisture-resistant core and facing rated for the expected relative humidity.
−## Natatoriums, locker rooms, shower areas, and some food-service spaces routinely exceed 80% relative humidity. Standard fiberglass and fabric assemblies are not suitable; mineral-wool or closed-cell foam cores with moisture-resistant facings are required. {note}
−
```datasheet
label: Humidity Service Condition
…6 unchanged lines
```
+## Natatoriums, locker rooms, shower areas, and some food-service spaces routinely exceed 80% relative humidity. Standard fiberglass and fabric assemblies are not suitable; mineral-wool or closed-cell foam cores with moisture-resistant facings are required. {note}
+
## Panels in corridors, gymnasiums, and other high-traffic or contact-prone areas shall be specified with an impact-resistant core.
−## Standard panels resist roughly 50 lbf to 100 lbf of surface force, which is adequate for offices and conference rooms but not for spaces where balls, carts, or repeated contact occur. High-impact cores and reinforced facings are tested separately (manufacturer test or ASTM C367) and are specified explicitly where contact is expected. {note}
−
```datasheet
label: Impact Resistance
…5 unchanged lines
```
+## Standard panels resist roughly 50 lbf to 100 lbf of surface force, which is adequate for offices and conference rooms but not for spaces where balls, carts, or repeated contact occur. High-impact cores and reinforced facings are tested separately (manufacturer test or ASTM C367) and are specified explicitly where contact is expected. {note}
+
# Acoustic Performance {toc}
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## The specified absorption value shall always be accompanied by the ASTM E795 mounting type at which it is achieved.
+```datasheet
+label: ASTM E795 Mounting Type
+type: select
+options:
+ - Type A (direct to solid substrate, no air gap)
+ - Type E-100 (furred 100 mm air gap)
+ - Type E-400 (suspended 400 mm air gap)
+ - Type D (suspended cloud)
+default: Type A (direct to solid substrate, no air gap)
+```
+
## A panel can read NRC 0.80 on a Type E mounting with an air gap and only NRC 0.65 mounted directly to the substrate. Stating a number without its mounting type makes the requirement unverifiable and invites substitution of a lower-performing assembly that nominally "meets" the value at a more favorable, untested mounting. {note}
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## The ASTM E795 mounting type defines the air gap behind the panel. An air gap raises low-frequency absorption substantially: a Type E mounting with a 100 mm gap can add 0.05 to 0.15 NRC units relative to direct mounting. The specified mounting must match the manufacturer's tested mounting, and the as-built air gap must match the specified one. {note}
−```datasheet
−label: ASTM E795 Mounting Type
−type: select
−options:
− - Type A (direct to solid substrate, no air gap)
− - Type E-100 (furred 100 mm air gap)
− - Type E-400 (suspended 400 mm air gap)
− - Type D (suspended cloud)
−default: Type A (direct to solid substrate, no air gap)
−```
−
## Panels used in open-plan offices with a shared ceiling plenum shall meet the project's Ceiling Attenuation Class requirement where speech privacy between bays is required.
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### The panel core shall be selected to meet the acoustic, fire, sustainability, and service-condition requirements of the application.
−### Core type is the primary driver of acoustic performance, fire rating, moisture tolerance, and environmental profile. Fiberglass and mineral wool dominate fabric-wrapped commercial work; recycled PET offers a color-through, fabric-free option; wood-based and foam cores serve specific aesthetic and budget niches. {note}
−
```datasheet
label: Panel Core Material
…8 unchanged lines
```
+### Core type is the primary driver of acoustic performance, fire rating, moisture tolerance, and environmental profile. Fiberglass and mineral wool dominate fabric-wrapped commercial work; recycled PET offers a color-through, fabric-free option; wood-based and foam cores serve specific aesthetic and budget niches. {note}
+
### The core shall provide the dimensional stability required to maintain a flat, true face over the panel's service life under the project's environmental conditions.
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### Panel thickness shall be selected for the required absorption spectrum, with thicker panels specified where low-frequency absorption is critical.
−### A 1 in. (25 mm) panel is the commercial default and delivers good mid- and high-frequency absorption. Low-frequency absorption (125 Hz to 250 Hz) improves with thickness, so 1.5 in. and 2 in. panels are specified for music rooms, recording suites, and conference rooms where HVAC rumble and low-frequency speech energy must be controlled. {note}
−
```datasheet
label: Panel Thickness
…6 unchanged lines
```
+### A 1 in. (25 mm) panel is the commercial default and delivers good mid- and high-frequency absorption. Low-frequency absorption (125 Hz to 250 Hz) improves with thickness, so 1.5 in. and 2 in. panels are specified for music rooms, recording suites, and conference rooms where HVAC rumble and low-frequency speech energy must be controlled. {note}
+
## Face Finish {toc}
### The face finish shall be selected for the required aesthetics, durability, and acoustic transparency of the application.
−### Face finish governs appearance, durability, cleanability, and whether the panel accepts push-pins. Each face type carries trade-offs: fabric wraps offer the widest color range, perforated metal resists impact and abuse, wood faces provide a warm architectural appearance, and exposed PET fiber needs no separate facing. {note}
−
```datasheet
label: Face Finish Type
…8 unchanged lines
```
+### Face finish governs appearance, durability, cleanability, and whether the panel accepts push-pins. Each face type carries trade-offs: fabric wraps offer the widest color range, perforated metal resists impact and abuse, wood faces provide a warm architectural appearance, and exposed PET fiber needs no separate facing. {note}
+
### Fabric-wrapped face finishes shall be selected from the manufacturer's standard range confirmed acoustically transparent.
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### The panel edge profile shall be specified to match the architectural detail at panel borders and joints.
−### Edge profile affects how panels read against adjacent surfaces and how joints align. Square edges give a clean modular grid; beveled and reveal edges articulate joints; radiused and fabric-returned edges soften borders. The profile must be coordinated with the shop drawings and any reveal trim. {note}
−
```datasheet
label: Edge Profile
…8 unchanged lines
```
+### Edge profile affects how panels read against adjacent surfaces and how joints align. Square edges give a clean modular grid; beveled and reveal edges articulate joints; radiused and fabric-returned edges soften borders. The profile must be coordinated with the shop drawings and any reveal trim. {note}
+
## Panel Size and Module {toc}
### Panel sizes shall be specified as standard modules wherever the layout permits, with custom field dimensions reserved for conditions that standard modules cannot resolve.
−### Standard modules — typically 24 in. × 48 in. and 24 in. × 24 in. — minimize cost and lead time. Custom-cut field dimensions are used at borders, around penetrations, and for feature walls, but they increase cost and should be limited to where they are genuinely needed. Minimum practical panel size is about 12 in. × 12 in.; maximum single panel without special fabrication is about 48 in. × 96 in. {note}
−
```datasheet
label: Panel Module
…8 unchanged lines
```
+### Standard modules — typically 24 in. × 48 in. and 24 in. × 24 in. — minimize cost and lead time. Custom-cut field dimensions are used at borders, around penetrations, and for feature walls, but they increase cost and should be limited to where they are genuinely needed. Minimum practical panel size is about 12 in. × 12 in.; maximum single panel without special fabrication is about 48 in. × 96 in. {note}
+
### Custom-dimensioned panels shall be field-verified before fabrication where they abut existing construction or other finished trades.
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### Where panels are required to accept push-pins, the face fabric and backing density shall be specified as tackable.
−### Tackability is common in classrooms and conference rooms. Not every fabric-wrapped panel accepts and releases push-pins without damage; a tackable assembly requires a compatible face fabric over a backing of sufficient density. Specifying tackability after the fact often forces a panel substitution. {note}
−
```datasheet
label: Tackable Surface
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```
+### Tackability is common in classrooms and conference rooms. Not every fabric-wrapped panel accepts and releases push-pins without damage; a tackable assembly requires a compatible face fabric over a backing of sufficient density. Specifying tackability after the fact often forces a panel substitution. {note}
+
# Fire and Life-Safety Classification {toc}
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## Where the project pursues sustainability certification, panels shall meet the applicable VOC emission, recycled-content, and chain-of-custody requirements.
−## School and healthcare projects frequently require GREENGUARD Gold (UL 2818) certification, and panels that cover walls or ceilings must meet the VOC limits of the LEED v4.1 Low-Emitting Materials credit (Category 5 for ceilings, Category 6 for walls). Recycled content and Red List compliance may be specified where the project's program requires them. {note}
−
−### Panels in schools and healthcare facilities shall be GREENGUARD Gold (UL 2818) certified where required by the project program.
−
−### Wood-faced panels shall be supplied with FSC or equivalent chain-of-custody documentation where sustainability certification is pursued.
−
−### Chain-of-custody documentation for wood faces is frequently overlooked until closeout, when it cannot be retroactively obtained. Requiring it at submittal prevents a non-compliant product from being installed. {note}
−
```datasheet
label: VOC / Sustainability Certification
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```
+## School and healthcare projects frequently require GREENGUARD Gold (UL 2818) certification, and panels that cover walls or ceilings must meet the VOC limits of the LEED v4.1 Low-Emitting Materials credit (Category 5 for ceilings, Category 6 for walls). Recycled content and Red List compliance may be specified where the project's program requires them. {note}
+
+### Panels in schools and healthcare facilities shall be GREENGUARD Gold (UL 2818) certified where required by the project program.
+
+### Wood-faced panels shall be supplied with FSC or equivalent chain-of-custody documentation where sustainability certification is pursued.
+
+### Chain-of-custody documentation for wood faces is frequently overlooked until closeout, when it cannot be retroactively obtained. Requiring it at submittal prevents a non-compliant product from being installed. {note}
+
# Suspended Clouds and Baffles {toc}
## Suspended ceiling clouds and baffles shall be specified where panels are hung free of any continuous ceiling plane.
−## Clouds are horizontal panels suspended below the structure; baffles are vertical panels suspended in rows. Both are used where there is no continuous ceiling to surface-mount panels to, such as exposed-structure interiors. Their suspended mounting (ASTM E795 Type D) exposes both faces and edges to the room, which increases effective absorption per unit area. {note}
−
```datasheet
label: Suspended Element Type
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```
+## Clouds are horizontal panels suspended below the structure; baffles are vertical panels suspended in rows. Both are used where there is no continuous ceiling to surface-mount panels to, such as exposed-structure interiors. Their suspended mounting (ASTM E795 Type D) exposes both faces and edges to the room, which increases effective absorption per unit area. {note}
+
### Suspension hardware shall be selected for the panel weight and shall be attached only to structure capable of supporting the imposed load.
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## The attachment method shall be selected for the substrate, the panel weight, and the project's requirement for future replaceability.
−## Impaling clips and adhesive suit lightweight panels on solid substrates; Z-clips and mechanical fasteners allow removable, replaceable installation; cable suspension serves clouds and baffles. The method affects installation cost and whether individual panels can be removed for cleaning or replacement. {note}
−
```datasheet
label: Attachment Method
…8 unchanged lines
```
+## Impaling clips and adhesive suit lightweight panels on solid substrates; Z-clips and mechanical fasteners allow removable, replaceable installation; cable suspension serves clouds and baffles. The method affects installation cost and whether individual panels can be removed for cleaning or replacement. {note}
+
## Substrate blocking required to support clip- or fastener-attached panels shall be provided and shown on the drawings.
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default: 2
```