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School and classroom acoustics in New Zealand
Hard floors, bare walls and long corridors that amplify everything. Children with developing language, and anyone with a hearing difficulty, lose more from a live classroom than adults do, which is why intelligibility is the target rather than quiet. Classroom acoustics are taken seriously and open plan learning spaces are common, which makes speech intelligibility the design target.
- Classroom RT
- A number, set against room volume, achieved mostly at the ceiling.
- Corridor spill
- Long hard circulation feeds every room off it. Treating the corridor helps every classroom at once.
- Halls and gyms
- Dual use rooms carrying speech, music and sport, where durability decides the product.
- Quote
- From a plan and a section, within 48 hours
01 / The material
What this is, and what it changes in a New Zealand room
Hard floors, bare walls and long corridors that amplify everything. Children with developing language, and anyone with a hearing difficulty, lose more from a live classroom than adults do, which is why intelligibility is the target rather than quiet.
Classroom acoustics are taken seriously and open plan learning spaces are common, which makes speech intelligibility the design target.
Work reaching us from New Zealand is mostly timber frame housing, apartments, offices, schools, clinics, studios.
- Timber frame, very little mass Light construction passes low frequency easily. Added mass and a decoupled layer do the work, and absorption alone will not.
- Designed to move Seismic detailing means junctions and joints that have to stay flexible. An acoustic build-up has to respect that rather than bridge it rigidly.
- A long sea leg This is one of the longest routes we run. Ordering to a real schedule matters more here than anywhere else, so we quote the full window.
- Classroom RT A number, set against room volume, achieved mostly at the ceiling.
Full specification
Thickness, density, NRC by frequency, fire class, standard sizes and build-up detail for school acoustics are on the main product page. This page covers what that means for a project in New Zealand.
02 / The build-up
What goes where, from the structure in
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Layer 1
Wood wool acoustic panels
Wood fibre bound into a rigid board with an open texture. In New Zealand, heat pumps and ducted systems, with outdoor units close to boundaries in dense suburbs.
On a cavity. Mounted on battens with an air gap, which is where the low mid performance comes from.
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Layer 2
Ceiling baffles and clouds
PET felt suspended from the soffit, vertically as baffles or horizontally as clouds. In New Zealand, school halls, marae and community centres carry speech and performance in the same hard room.
Mixed with services. Set out around ducts, trays and lighting rather than fighting them, coordinated from your reflected ceiling plan.
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Layer 3
Acoustic panels
The full absorber range rather than one product: plain PET felt, printed felt, grooved panels and fabric finishes, chosen by how the room is used and how it has to look. In New Zealand, classroom acoustics are taken seriously and open plan learning spaces are common, which makes speech intelligibility the design target.
Ceiling first. In most rooms the ceiling is the largest untreated surface and the cheapest square metre of result.
Architects working in New Zealand usually need the build-up before the product. We will draw the section and mark what does the work. See how we support architects.
03 / Local conditions
What the buildings in New Zealand do to the specification
- Timber frame, very little mass
Light construction passes low frequency easily. Added mass and a decoupled layer do the work, and absorption alone will not.
- Designed to move
Seismic detailing means junctions and joints that have to stay flexible. An acoustic build-up has to respect that rather than bridge it rigidly.
- A long sea leg
This is one of the longest routes we run. Ordering to a real schedule matters more here than anywhere else, so we quote the full window.
- Damp and variable climate
PET felt does not absorb moisture, shed fibre or feed mould, which suits cold external walls and sealed rooms.
- Assembly and performance rooms
School halls, marae and community centres carry speech and performance in the same hard room.
- School and campus buildings
Classroom acoustics are taken seriously and open plan learning spaces are common, which makes speech intelligibility the design target.
04 / Room by room
Room by room, on a typical New Zealand job
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Classroom RT
A number, set against room volume, achieved mostly at the ceiling. Light construction passes low frequency easily. Added mass and a decoupled layer do the work, and absorption alone will not.
- PET felt acoustic panels, 100% PET non-woven, no added binder
- Wood wool acoustic panels, 20 mm
- Acoustic panels, Cut pattern in PET felt, adds visual rhythm without changing the absorber
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Corridor spill
Long hard circulation feeds every room off it. Treating the corridor helps every classroom at once. Seismic detailing means junctions and joints that have to stay flexible. An acoustic build-up has to respect that rather than bridge it rigidly.
- PET felt acoustic panels, 9, 12, 18 and 24 mm standard, tolerance plus or minus 5 percent
- Wood wool acoustic panels, 400 kg per cubic metre
- Acoustic panels, ASTM C423
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Halls and gyms
Dual use rooms carrying speech, music and sport, where durability decides the product. This is one of the longest routes we run. Ordering to a real schedule matters more here than anywhere else, so we quote the full window.
- PET felt acoustic panels, 4 to 24 mm
- Wood wool acoustic panels, 0.30
- Acoustic panels, 9 to 24 mm, 1220 x 2440 mm standard, up to 2440 x 4270 mm, 1200 to 3600 GSM
Designers get colour, pattern and CNC options with the absorption figure attached to each. See how we work with interior designers.
04 / Climate and durability
Why the climate in New Zealand changes the material, not the target
New Zealand is cool and damp, with long heating seasons and cold external walls, and that narrows the material list before acoustics is discussed.
Cold wall build-ups and long heating seasons mean interstitial condensation is a real risk behind any lining. PET felt is unaffected by damp air and will not feed mould where a fabric-faced mineral product would.
The failure we design against here is condensation behind linings in older, poorly insulated stock.
Consultants get the raw data, not a sales sheet. That is the whole of our side of the job, and it is set out under working with acoustic consultants.
06 / Straight talk
Six mistakes that turn into a second fit-out
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Panels at child height where they get damaged
This is the one that comes back as a second fit-out rather than a snag.
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Treating one classroom and leaving the corridor
Small on the drawing, expensive on site, and almost always found after handover.
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Choosing a product that cannot take a football
Plant noise treated as a room problem is the most reliable way to spend a budget and change nothing anyone can hear.
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Treating it as a generic New Zealand job
Light construction passes low frequency easily. Added mass and a decoupled layer do the work, and absorption alone will not.
05 / Logistics
Getting it to New Zealand, with real dates
| Ships from | Palwal, Haryana, India |
|---|---|
| Arrives at | Auckland or Tauranga, then road to site |
| Dispatch | 4 to 7 working days |
| Freight | Sea via Auckland |
| Support | Drawings, build-ups, BOQ and material that arrives complete |
Standard items dispatch in 4 to 7 working days. The sea leg from India is long, so plan the full door to door window into the programme. We give real dates, not optimistic ones.
Sea freight into Auckland or Tauranga, then road to site. Air freight for samples and genuinely urgent quantities.
Questions from New Zealand projects
What makes school and classroom acoustics different in New Zealand?
Classroom acoustics are taken seriously and open plan learning spaces are common, which makes speech intelligibility the design target. Light construction passes low frequency easily. Added mass and a decoupled layer do the work, and absorption alone will not.
Where should the budget go first on a New Zealand project?
Classroom RT. A number, set against room volume, achieved mostly at the ceiling. Corridor spill. Long hard circulation feeds every room off it. Treating the corridor helps every classroom at once.
Do you have an office or installation team in New Zealand?
No. We manufacture in India and supply into New Zealand. We give you drawings, build-ups, a BOQ and material that arrives complete, and we will tell you plainly when a job needs a local contractor we cannot be.
How does material get to a New Zealand site?
ships from: Palwal, Haryana, India, arrives at: Auckland or Tauranga, then road to site, dispatch: 4 to 7 working days. Standard items dispatch in 4 to 7 working days. The sea leg from India is long, so plan the full door to door window into the programme. We give real dates, not optimistic ones.
What goes wrong most often on this kind of project?
Panels at child height where they get damaged. Treating one classroom and leaving the corridor.
What do you need from us to quote?
A plan, a section through the critical partition or ceiling, and what the room is for. From that we can give a build-up and a BOQ rather than a price per square foot.
Next step
Drawings in, BOQ and a delivered date out
A plan and a section is enough. We will come back with a build-up, a BOQ and a delivered date, and we will say so if what you are asking for will not work.