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StarSilent Acoustical Ceilings | Pyrok
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StarSilent Acoustical Ceilings | Pyrok

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  • Use

    Interior ceilings
  • Applications

    Office interiors, lobbies, atriums, natatoriums, gymnasiums
  • Characteristics

    Plaster sound panels manufactured from recycled crushed glass , NRC values range from 0.55 to 0.90, two acoustical finishes: smooth and superfine, can be used on curved surfaces of any radius, can be integrated with a radiant heating and cooling system
  • Colors

    White, tinted or painted
  • Sizes

    10mm, 15mm and 25mm thicknesses
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More about this product

StarSilent is a sound absorbing panel that is composed of up to 96% post-consumer, recycled crushed glass bottles and coated with sound permeable plasters. Typically, StarSilent ceiling panels are specified for office interiors, lobbies, atriums, natatoriums, gymnasiums and other areas requiring acoustical performance without the look of ceiling grids. Their acoustical performance is typically an NRC = 0.55 to 0.90.

Ceiling System

The panels are attached to rigid metal framing with zinc coated drywall screws. The edges of the panels are glued together using a special adhesive, which is also spread over the screw heads. The StarSilent Acoustical System is mounted with an air gap to maximize sound absorbing performance. The gap can be as little as 3/8 inch (where ceiling heights need to be preserved) to 3 5/8 inches for wall assemblies or greater.

After light sanding, the panels are first coated with a base coat plaster that requires a minimum of 36 hours to dry. The finish coat plaster is then applied to achieve a smooth, seamless, sound absorbing plaster ceiling.

Sound Absorption

StarSilent sound panels are available in two finishes, smooth and superfine, that present different acoustical absorption values. The Smooth System is hand applied to a smooth finish:

Sound Absorption Coefficients
Test Description
125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz NRC
StarSilent smooth plaster with 25mm StarSilent board with 16 inch air gap (E 400 mounting) 1, 2, 3 .55 .44 .86 1.08 .95 .94 .85
StarSilent smooth plaster with 15mm StarSilent board with 16 inch air gap (E 400 mounting) 1, 2 .61 .60 .52 .53 .58 .58 .55
StarSilent smooth plaster with 10mm StarSilent board with 16 inch air gap (E 400 mounting) 1, 2 .29 .69 .68 .74 .63 .45 .70
  1. Higher acoustical absorption values can be achieved by placing 2.0 inch acoustical insulation above the StarSilent system. Contact Pyrok Inc. for this test data.
  2. Contact Pyrok Inc. for acoustical test data for air gaps of 3/8 inch and 7/8 inch between the StarSilent panels and wall or ceilings substrate.
  3. Contact Pyrok Inc. for acoustical data for direct mounting (no air gap) to substrate for the 25mm StarSilent system.

StarSilent Superfine Finish System is a spray applied to a lightly textured finish that looks smooth at distances greater than 18 feet. The Superfine finish is especially recommended when there are high ceiling heights (as full deck scaffolding is not required and the Superfine texture appears smooth) and where critical light may highlight the hand trowelling limitations of the smooth system.

Sound Absorption Coefficients
Test Description
125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz NRC
StarSilent superfine sprayed finish over 25mm StarSilent board with 16 inch air gap (E 400 mounting) 1 .45 .34 .69 1.08 1.00 1.05 .80
StarSilent superfine sprayed finish over 10mm StarSilent board with 16 inch air gap (E 400 mounting) 1 .65 .79 .58 .68 .86 .86 .70


The acoustical data represented here is the octave band data from the acoustical test reports. For the complete acoustical test reports, please contact Pyrok Inc.

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