ENSEMBLE™ ACOUSTICAL
PLASTERBOARD CEILING
Technical Manual (Installation Guide)
USGBoral.com Interior Linings Ceilings Cornice Finishes Systems Solutions
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CONTENTS
Introduction to the System 2
System Summary 3
Design Considerations 4
Components 6
Personal Protective Equipment 11
Spraying Equipment 12
System Configuration 13
Installation of Board 16
Mixing of USG Boral Ensemble™ Spray-Applied Finish 19
Setting the Equipment 20
Spraying 22
Cleaning 24
Ceilings
INTRODUCTION
TO THE SYSTEM
USG Boral Ensemble™ Acoustical Plasterboard Ceiling offers the seamless look of plasterboard with true acoustical
performance. Installation is similar to standard plasterboard and plasterboard suspension systems. USG Boral
Ensemble™ Ceiling Panels are highly engineered gypsum panels that perform like acoustical ceiling panels.
Product Sizes Remarks
Rondo Top Cross Rail (PN 128) Length: 3600mm Height: 38mm Spaced at 1200mm centres maximum
Rondo Furring Channel (PN 129) Length: 3600mm Height: 28mm Spaced at 600mm centres maximum
Rondo Furring Channel Track (for perimeter) (PN 140) Length: 3000mm
Rondo TCR and Rod Joiner (PN 2534)
Rondo TCR to FC Joiner (PN 139)
Rondo 5mm Soft Galvanised Suspension Rod (PN 121) Length: 3600mm Spaced at 1200mm centres maximum
90mm-thick 14kg/m3 glasswool 90mm x 600mm x 2700mm
USG Boral Ensemble™ Ceiling Panels 13mm x 1200mm x 3000mm
USG Sheetrock® Brand Paper Joint Tape 63.5mm x 76.2m or 63.5mm x 152.4m
USG Boral BaseCote™ 20kg per bag
USG Boral Sheetrock® Lightweight Finishing Compound Plus 3 18kg per pail
USG Boral Ensemble™ Spray-Applied Finish, White 17L per pail
Features and Benefits
• Non-directional, monolithic appearance with
fine texture
• Special acoustical perforated USG Boral Ensemble™
Panels to optimise sound performance
• Installs and finishes similar to plasterboard
• Up to NRC 0.80 and αw 0.80
• Less than 0.5mg/m3 TVOC
• High light-reflective finish (LR-0.85) reduces
fixture and energy use
• Acoustically transparent spray-applied finish
Applications
• Reception areas
• Lobbies
• Conference rooms
• Restaurant dining areas
• Museums / Galleries
• Heritage Buildings
• Retail
• Spaces with multiple hard surfaces
• Courtrooms
• Offices
• Classrooms or higher education
• Libraries
• Healthcare offices and lobbies
Ensemble™
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SYSTEM SUMMARY
System USG Boral Ensemble™ Acoustical Plasterboard Ceiling
Framing Rondo Keylock Suspension System
Application Reception areas, Lobbies, Conference rooms, Restaurant dining areas, Museums
/ Galleries, Retail, Spaces with multiple hard surfaces, Courtrooms, Offices,
Classrooms or higher education, Libraries, Healthcare offices and lobbies.
Description USG Boral Ensemble™ Acoustical Plasterboard Ceiling is a lightweight,
non-combustible, and high acoustic seamless ceiling system consisting of
13mm-thick USG Boral Ensemble™ Ceiling Panels, screw fixed to a Rondo Keylock
Suspension System, and finished using USG Boral Ensemble™ Spray-Applied Finish.
Performance Mass ≈ 10kg/m2
Acoustic rating Up to NRC 0.80, αw 0.80, CAC 50
Light reflectance 0.85
Fire hazard properties Group 1 - Australia, Group 1s - New Zealand
(AS/NZS 3837).
Finish White, seamless, and spray-applied fine texture with low
VOC-emitting material
Specification Lining USG Boral Ensemble™ Ceiling Panels 13mm-thick
Framing Rondo Keylock Suspension System
Insulation Glasswool 90mm-thick 14kg/m3
Fastener 32mm Type “S” Needle Point Screws
Joint Tape USG Sheetrock® Brand Paper Joint Tape
Jointing Compound 1st and 2nd coat –
USG Boral BaseCote™
3rd coat –
USG Boral Sheetrock® Lightweight Finishing Compound
Plus 3
Final finish USG Boral Ensemble™ Spray-Applied Finish
Warranty To ensure the performance of this system meets the USG Boral Warranty
requirements, only USG Boral products are to be used and installed in accordance
with USG Boral specification and recommendations.
DESIGN CONSIDERATIONS
Glancing Light
Glancing light is the light that shines across a surface, rather than directly at it. Glancing light casts shadows
from minuet undulations that would not normally be visible in diffused (non-directional) lighting. While minor
surface variations can always be expected (even with a Level 5 finish), the appearance of flatness will depend
predominantly on the amount of glancing light the surface receives and to some degree, its intensity and
direction. Some of the worst instances of glancing light occur with ceiling-mounted unshaded light globes and
where windows are located close to ceilings, allowing sunlight to shine across adjacent surfaces. In order to
avoidthe effects of glancing light, it is important to carefully plan the selection and placement of windows and
lighting during the design phase.
Artificial Light
It is recommended that artificial lighting should either be hung below the ceiling surface and fitted with shades,
or recessed into the ceiling (i.e. downlights). Positioning of feature lighting, such as spot and flood lights, needs
to be planned so that light shining across the ceiling surface is minimised. High output lights are more severe in
their effect because they create deeper shadows. Similarly, the whiter the light, the stronger the contrast and
the greater the perceived surface variations. Soft, low wattage, diffused lighting provides the most favourable
lighting conditions for ceiling surfaces.
Natural Light
The effects of natural glancing light can be exaggerated by late afternoon or early morning sunlight, as well as
reflections from adjacent walls, roofs and water features such as swimming pools, canals and waterways. Raked
ceilings abutting clerestory windows, and flat ceilings abutting window heads, are likely to be affected. Where a
building design cannot be changed, the effects of glancing light can be minimised by using window shades, soft
furnishings, curtains, blinds and pelmets.
NOTES:
• USG Boral publication Guide to Lighting and Decoration of Plasterboard provides further guidance to good
lighting and decoration practice.
• High intensity halogen floodlights or fluorescent lights should not be used for visual inspection of interior
surfaces, as they create unfavourable glancing light conditions.
Ceilings Ensemble™
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COMPONENTS
Rondo Keylock Suspension System
Insulation
90mm-thick 14kg/m3 glasswool
Rondo Top Cross Rail
(PN 128)
Rondo Suspension Clip
(PN 2534)
Rondo Furring Channel Track
(PN 140)
Rondo Furring Channel
(PN 129)
Rondo Connecting Clip
(PN 139)
Rondo 5mm Soft Galvanised
Suspension Rod (PN 121)
Plasterboard Lining
USG Boral Ensemble™ Ceiling Panels
13mm-thick, 1200mm-wide, and 3000mm in length, with tapered edges as supplied by USG Boral.
To be identified by a translucent veil on the front face and a translucent veil on the back face, as well as a R12-1
12mm Round Hole pattern with no band and having 20% perforation ratio on the board surface.
Ceilings Ensemble™
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Finishing Systems
Name:
USG Boral Sheetrock® Paper Joint Tape
Size (width x length):
63.5mm x 76.2m or 63.5mm x 152.4m
Name:
USG Boral BaseCote™
Colour:
Off white
Working time:
Setting type – 45, 60, 90 minutes working time
Packaging:
20kg bag
VOC:
Less than 50g per litre
Joint Tape
First and Second Coat
COMPONENTS
Name:
USG Boral Sheetrock® Plus 3 Lightweight Finishing
Compound Plus 3
Colour:
Off white
Working time:
Setting type – air dry
Packaging:
18kg bag
VOC:
Less than 50g per litre
Name:
USG Boral Ensemble™ Spray-Applied Finish
Colour:
White
Binder:
Water-based acrylic
Coverage:
Approximately 10m2 per 17-litre pail
pH:
9.0 to 10.0
Weight Solids:
55-60%
Packaging:
17-litre pail
Third Coat
Ceilings Ensemble™
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Finishing Tools
Sanding block with 180 to 220-grit sandpaper
Must use only sanding block with sandpaper to sand, take care not to scuff the front veil. No wet sanding or
sponge sanders allowed.
Pitch squeegee trowel
COMPONENTS
Disposable Protective Overalls
P2/N95 Dust Mask (AS/NZS 1716:2012)
Safety Glasses
PERSONAL PROTECTIVE
EQUIPMENT
The P2/N95 mask is a particulate filter personal
respiratory protection device, capable of filtering
0.3µm particles. It complies with the AS/NZS
1716:2012.
• N95 classification indicates compliance with
NIOSH testing requirements
• P2 classification indicates compliance with
European testing requirements
*Image credit: https://www.homedepot.com/p/Florida-Coast-Super-Polymer-
Coveralls-HD-1428/301810935
* Florida Coast Super Polymer Coveralls is a trademark of Home Depot Product Authority, LLC (or their affiliates). The depiction in this material is for illustrative
purpose only and is not an endorsement by either party on the subject product.
Peaked Cap
Ceilings Ensemble™
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Texture Sprayer
Air Compressor
SPRAYING EQUI
