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For projects in Bangladesh
School and classroom acoustics in Bangladesh
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. Classrooms are concrete and tile with very large class sizes, and street noise enters through open windows all day.
- 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 you are buying, and what it fixes in Bangladesh
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.
Classrooms are concrete and tile with very large class sizes, and street noise enters through open windows all day.
Work reaching us from Bangladesh is mostly garment and manufacturing units, generator and plant rooms, offices, hospitals, schools, hotels.
- Reachable by road The land border makes this one of our shortest export routes. You can order what the job needs rather than over-ordering against a long sea transit.
- Garment units at scale Large production floors with continuous machine noise and rooms where instructions and alarms have to be understood. Enclosure first, absorption second.
- Generators run constantly Standby and continuous generation sits close to occupied space almost everywhere. That is mass and enclosure work, not panels.
- 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 Bangladesh.
02 / The build-up
The build-up, layer by layer
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Layer 1
Wood wool acoustic panels
Wood fibre bound into a rigid board with an open texture. In Bangladesh, split units and diesel generator sets, with generators close to occupied rooms and running often.
Direct fix. Mechanically fixed to the soffit or wall. Durable and simple.
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Layer 2
Ceiling baffles and clouds
PET felt suspended from the soffit, vertically as baffles or horizontally as clouds. In Bangladesh, community halls, places of worship and conference rooms are hard volumes carrying amplified speech.
Horizontal clouds. Flat rafts over the occupied zone, which also reflect early speech energy back down where it helps.
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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 Bangladesh, classrooms are concrete and tile with very large class sizes, and street noise enters through open windows all day.
Ceiling first. In most rooms the ceiling is the largest untreated surface and the cheapest square metre of result.
For a Bangladesh practice, the useful thing is a detail you can put in a drawing set, not a brochure. See how we support architects.
03 / In this market
What we see driving Bangladesh briefs
- Reachable by road
The land border makes this one of our shortest export routes. You can order what the job needs rather than over-ordering against a long sea transit.
- Garment units at scale
Large production floors with continuous machine noise and rooms where instructions and alarms have to be understood. Enclosure first, absorption second.
- Generators run constantly
Standby and continuous generation sits close to occupied space almost everywhere. That is mass and enclosure work, not panels.
- Dense, humid, monsoon climate
PET felt does not hold moisture or feed mould, which decides whether a ceiling survives more than a couple of seasons.
- Assembly and performance rooms
Community halls, places of worship and conference rooms are hard volumes carrying amplified speech.
- School and campus buildings
Classrooms are concrete and tile with very large class sizes, and street noise enters through open windows all day.
04 / Room by room
Where the money goes on a Bangladesh project
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Classroom RT
A number, set against room volume, achieved mostly at the ceiling. The land border makes this one of our shortest export routes. You can order what the job needs rather than over-ordering against a long sea transit.
- PET felt acoustic panels, 100% PET non-woven, no added binder
- Ceiling baffles and clouds, 9 to 24 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. Large production floors with continuous machine noise and rooms where instructions and alarms have to be understood. Enclosure first, absorption second.
- PET felt acoustic panels, 9, 12, 18 and 24 mm standard, tolerance plus or minus 5 percent
- Ceiling baffles and clouds, Made to the drawing, standard and custom
- Acoustic panels, ASTM C423
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Halls and gyms
Dual use rooms carrying speech, music and sport, where durability decides the product. Standby and continuous generation sits close to occupied space almost everywhere. That is mass and enclosure work, not panels.
- PET felt acoustic panels, 4 to 24 mm
- Ceiling baffles and clouds, Both faces work, which is why suspended area outperforms the same area laid flat
- Acoustic panels, 9 to 24 mm, 1220 x 2440 mm standard, up to 2440 x 4270 mm, 1200 to 3600 GSM
For a Bangladesh interior where the finish leads, we will say plainly what each option costs you acoustically. See how we work with interior designers.
04 / Climate
What the Bangladesh climate rules in and rules out
Bangladesh is warm and humid through most of the year, with a long wet season, and that narrows the material list before acoustics is discussed.
Humidity is the deciding factor. PET felt does not absorb moisture, shed fibre or feed mould, which is why it outlasts fabric-wrapped mineral wool in this climate. Wood wool and timber need a ventilated cavity behind them.
The failure we design against here is mould, sagging fabric finishes and swelling in timber.
Where a consultant is already engaged on a Bangladesh project, we supply to their specification and send the test reports rather than describing them. More on working with acoustic consultants.
06 / Straight talk
What we watch go wrong on jobs like this
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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
This is the one that comes back as a second fit-out rather than a snag.
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Choosing a product that cannot take a football
Noise with a source is fixed at the source. Treating the receiving room is the expensive way to get a small result.
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Treating it as a generic Bangladesh job
The land border makes this one of our shortest export routes. You can order what the job needs rather than over-ordering against a long sea transit.
05 / Route to site
How material reaches a Bangladesh site
| Ships from | Palwal, Haryana, India |
|---|---|
| Arrives at | Chattogram by sea, or overland through the land border |
| Dispatch | 4 to 7 working days |
| Freight | Sea or land border |
| Support | Drawings, build-ups, BOQ and material that arrives complete |
Standard items dispatch in 4 to 7 working days. Grooved panels and custom colours take longer, and we say so before you order, not after.
Sea freight into Chattogram, or overland through the land border where that suits the programme better. Air freight for samples and urgent quantities.
Questions from Bangladesh projects
What makes school and classroom acoustics different in Bangladesh?
Classrooms are concrete and tile with very large class sizes, and street noise enters through open windows all day. The land border makes this one of our shortest export routes. You can order what the job needs rather than over-ordering against a long sea transit.
Where should the budget go first on a Bangladesh 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 Bangladesh?
No. We manufacture in India and supply into Bangladesh. 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 Bangladesh site?
ships from: Palwal, Haryana, India, arrives at: Chattogram by sea, or overland through the land border, dispatch: 4 to 7 working days. Standard items dispatch in 4 to 7 working days. Grooved panels and custom colours take longer, and we say so before you order, not after.
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
Send the drawings, get a straight answer
We quote from drawings, not from a square foot rate. Send a plan and the section through the critical wall or ceiling and you will get something you can actually build from.