Successful Acoustic Ceiling Tile Replacement at Darwin High School School Acoustic Ceiling Tile Case Study | Darwin High School

Darwin High School

Acoustic excellence at Darwin

The Northern Territory Government recently worked on an extensive project with long-term CSR Gyprock customer and Australian Plaster Acoustics, to help solve a recurring issue with failing ceiling systems.

This project was considerably large in scale, replacing approximately 3000 square metres of ceilings in the administration building of the high school, all whilst working with a limited time frame during mid-term school holidays.

There was a need to manage the sound reverberation and reduction of noise within the learning environments at Darwin High School, so an acoustic ceiling tile was a necessary inclusion

- Mark Taylor | Director of Buildings Maintenance and Minor Works, Northern Territory Government

The Solution

Australian Plaster Acoustics put forward the high quality Shadex option of custom made ceiling tiles - a 600mm x 600mm acoustic bespoke ceiling tile made with Gyprock Casting Plaster – a grit free speciality plaster that produces a strong moulded product with a clean cast face.

Incorporating a 3D grid pattern of tiny square blocks randomly aligned on the tile, Shadex provides a rigid, faceted diamond appearance once installed.

I wanted to ensure that the ceiling tiles created were unique in style, aesthetically pleasing and most importantly, offered excellent sound absorption capabilities

- Roger Bailey | Australian Plaster Acoustics

Product Description: New Shadex

New Shadex plaster acoustic ceiling tile,lights are manufactured from reinforced casting plaster and offer excellent sound absorption, controlled sound transmission and decorative finishes.

The tiles are supplied with an integrated sound absorbent batt inserted during casting and are produced in a range of varying designs. These tiles are pre–painted white.

New Shadex Tile,light Features

Perforated in a regular pattern of 7mm circular holes at the face, tapering to 6.5mm at the rear at 13mm spacingw

New Shadex Tile,light Advantages
  1. Dimensionally stable, will not warp or buckle
  2. Not affected by humidity
  3. Fire resistant
  4. Acoustic properties
  5. Redecoration does not affect the properties
  6. Easy removal and replacement

New Shadex Sound Absorption Test Results

AS ISO 354–2006 “Acoustics–Measurement of sound absorption in a reverberation room”
AS ISO 11654–2002 (ISO 11654:1997) “Acoustics–Rating of sound absorption–Materials and systems”

αw = 0.75
SAA = 0.81
NRC = 0.80
CAC1 = 38
CAC2 = 41

Physical Properties

Tile Thickness 30 mm
Size 600mm x 600mm
Open Area 19.8 %
Mass 12.20 kg/m2
Weight per tile 4.45 kg
R Value 0.80
Light Reflective 0.80 %

Acoustic ceiling tiles are supplied underside of tile sealed off with a plaster skim coat as standard. Please contact us for unsealed options.

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Rondo Suspension System

Duo 1/Duo x 1200 Duo2/600