Acoustic Laster Final-1
Acoustic Laster Final-1
Acoustic Laster Final-1
SOUNDBREAKER BARS
BARRIER SHIELD
ACOUSTIC PROPERTIES
q ACOUSTIC PLASTERS CAN SIGNIFICANTLY REDUCE THE SOUND
REVERBERATION WITHIN THE SPACE.
q MOST ACOUSTIC PLASTERS HAVE A NOISE REDUCTION COEFFICIENT
BETWEEN 0.5 AND 1.00.
q THE NOISE REDUCTION COEFFICIENT (NRC) DETERMINES THE ABILITY OF A
MATERIAL TO REFLECT OR ABSORB SOUND.
q IT IS A NUMBER BETWEEN 0 AND 1, WHICH 0 BEING PERFECTLY REFLECTIVE
AND 1 BEING PERFECTLY ABSORPTIVE.
q THE APPLICATION OF ACOUSTIC PLASTERS HELPS TO INCREASE THE
INTELLIGIBILITY OF VOICE, MUSIC, AND OTHER SOUNDS UNDER DESIRABLE
ENVIRONMENT. IN ADDITION, ACOUSTIC PLASTERS ARE ALSO FIREPROOF AND
LEED RATED.
q HOWEVER, IT CAN BE MORE FRAGILE, BEING AFFECTED BY PHYSICAL STRESS
AND HUMIDITY.
ADVANTAGES OF ACOUSTIC PLASTER
q IMPROVES ACOUSTICS AND THUS SPEECH INTELLIGIBILITY.
q IS SUITABLE FOR A WIDE VARIETY OF SUBSTRATES, SUCH AS WALLS AND CEILINGS IN MANY
CONCEIVABLE FORMS.
q INCREASES PRODUCTIVITY AND ENSURES A PLEASANT WORKING AND LIVING ENVIRONMENT.
q IS DEVELOPED FOR EFFICIENCY AND CAN, THEREFORE, QUICKLY AND EFFORTLESSLY BE APPLIED.
q SAVES UP TO 10% ON ENERGY COSTS
q IN CONTRAST, ACOUSTIC PLASTERS PROVIDE A SMOOTH APPLICABLE AND A SEAMLESS
APPEARANCE. IT ALSO ALLOWS GREATER FLEXIBILITY FOR READJUSTMENT.
APPLICATION
q DESPITE ITS ADVANTAGE, ACOUSTIC PLASTER REQUIRES HIGH LEVELS OF ARTISAN SKILLS IN ORDER TO OBTAIN THE
RATED SOUND ABSORPTION COEFFICIENTS. THE PROPORTIONS AND RECOMMENDED MIXING TIME OF THE PLASTER
MUST BE FOLLOWED STRICTLY IN ORDER TO ACHIEVE THE DESIRED RESULT. TO ENSURE SEAMLESS SURFACE, IT IS
RECOMMENDED TO START WITH A CEILING THAT IS PERFECTLY LEVEL. THE ABSORPTIVE SUBSTRATE PANELS ARE
THEN ATTACHED WITH ITS SEAMS FILLED AND SANDED SMOOTH.LAYERS OF PLASTER COATING ARE THEN APPLIED TO
ACHIEVE A SEAMLESS SMOOTH SURFACE.ACOUSTIC PLASTERS MAY BE WORKED TO PRODUCE DIFFERENT SURFACE
TEXTURES BUT MUST BE DONE TIMELY AFTER THE APPLICATION.
q DIFFERENT TYPES OF MOUNTING STYLES FOR ACOUSTIC PLASTERS CAN ALSO AFFECT THE ACOUSTIC PERFORMANCE
OF THE SYSTEM. THESE MOUNTING TYPES INCLUDE DIRECT TO SUBSTRATE, SUSPENDED OR DIRECT TO FRAMING, OR
A PLASTER ONLY SYSTEM THAT CAN BE SPRAYED ON DIRECTLY TO THE SUBSTRATE WITHOUT THE PLACEMENT OF ANY
ACOUSTICAL BOARDS. CONTROL JOINTS MAY ALSO BE BUILT INTO THE SYSTEM TO PREVENT CRACKS WITHIN THE
PLASTER.
q ACOUSTIC PLASTER IS USED IN CONSTRUCTION OF ROOMS WHICH REQUIRE GOOD ACOUSTIC QUALITIES SUCH AS
AUDITORIUM AND LIBRARIES. PROPRIETARY TYPES OF ACOUSTIC PLASTER DEVELOPED IN THE 1920S INCLUDED
MACOUSTIC PLASTER, SABINITE, KALITE, WYODAK, OLD NEWARK AND SPRAYO-FLAKE PRODUCED BY COMPANIES
SUCH AS US GYPSUM. THESE SUPERSEDED FELTS AND QUILTS AS A COMMON PREFERENCE OF ARCHITECTS BUT
WERE DIFFICULT TO APPLY AND SO WERE SUPERSEDED IN TURN BY ACOUSTIC TILES.
• Mounting Styles
• Acoustical plaster can be mounted in two
ways. The final application choice should be
selected by the architect based on the
projects specifications and requirements.
DIRECT TO SUBSTRATE (TYPE A)
• With Type A mounting, gypsum board is first
installed to a level 1 finish. All HVAC, electrical,
fire sprinkler and other penetrations are
sealed with traditional drywall tape or a self-
adhesive fire-tape to prevent air movement
between the occupied space and the plenum.
• Alternative substrates are: concrete, existing
plaster, GFRG surfaces, and previously painted
GWB. These substrates would need to be
tested for bond strength, cleaned and sanded
smooth. The acoustical board is attached to
the substrates with the adhesive and if
required, secured spring washers.
SUSPENDED - DIRECT TO FRAMING (TYPE E)
• With Type E mounting, the acoustical board and plaster are installed
directly to the drywall grid. The substrate is constructed without a layer of
GWB.
• The acoustical boards are mechanically attached to drywall grid thereby
eliminating the need and cost for a layer of GWB. here is an increase in
sound absorption performance in the low frequency range with the direct-
to grid installation method which is commonly referred to as the E-400 or
E-200 mount and/or air gap behind.