For projects in Sweden
School and classroom acoustics in Sweden
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 regulated, and open plan learning areas make 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 / What it is
The material, and what it actually does on a Sweden job
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 regulated, and open plan learning areas make speech intelligibility the design target.
Work reaching us from Sweden is mostly timber buildings and apartments, offices, schools, healthcare, hotels, studios.
- Classes are written and verified Projects arrive with a class and someone checks it afterwards. Send us the target and we will say where our material sits against it.
- Timber at scale Sweden builds tall in timber, and timber is light. Low frequency passes easily, so mass and decoupling do the work.
- Sealed through a long winter Ventilation runs constantly in closed buildings, so plant noise matters more than street noise.
- 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 Sweden.
02 / The build-up
How the layers stack, from the structure inwards
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Layer 1
PET felt acoustic panels
A rigid non-woven panel pressed from 100% polyester fibre, a large part of it recycled. In Sweden, balanced mechanical ventilation with heat recovery running through long heating seasons, so duct noise is constant.
Direct to wall. Panel bonded or mechanically fixed flat to the substrate. Simplest, and the weakest at low frequency.
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Layer 2
Wood wool acoustic panels
Wood fibre bound into a rigid board with an open texture. In Sweden, church buildings, culture houses and school halls are hard long-decay volumes.
Direct fix. Mechanically fixed to the soffit or wall. Durable and simple.
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Layer 3
Acoustic carpet and rugs
A tile carpet with a dense polyester face on a felt backing. In Sweden, classroom acoustics are regulated, and open plan learning areas make speech intelligibility the design target.
Loose lay on tackifier. Tiles lifted individually for access under a raised floor, which is why tile beats broadloom in an office.
Architects working in Sweden 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 / In this market
What the buildings in Sweden do to the specification
- Classes are written and verified
Projects arrive with a class and someone checks it afterwards. Send us the target and we will say where our material sits against it.
- Timber at scale
Sweden builds tall in timber, and timber is light. Low frequency passes easily, so mass and decoupling do the work.
- Sealed through a long winter
Ventilation runs constantly in closed buildings, so plant noise matters more than street noise.
- A long country
A site in the north has a real domestic leg. We quote it separately so the dates are honest.
- Assembly and performance rooms
Church buildings, culture houses and school halls are hard long-decay volumes.
- School and campus buildings
Classroom acoustics are regulated, and open plan learning areas make speech intelligibility the design target.
04 / Room by room
Room by room, on a typical Sweden job
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Classroom RT
A number, set against room volume, achieved mostly at the ceiling. Projects arrive with a class and someone checks it afterwards. Send us the target and we will say where our material sits against it.
- 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. Sweden builds tall in timber, and timber is light. Low frequency passes easily, so mass and decoupling do the work.
- 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. Ventilation runs constantly in closed buildings, so plant noise matters more than street noise.
- 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 / Conditions
Durability in Sweden, before acoustics is discussed
Sweden 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.
On a Sweden job with a consultant involved, our part is material that matches the submitted data. See working with acoustic consultants.
06 / Worth knowing
Six mistakes that turn into a second fit-out
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Panels at child height where they get damaged
Small on the drawing, expensive on site, and almost always found after handover.
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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
Enclose the machine, break the vibration path, then deal with what is left. Doing it in the other order costs more and achieves less.
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Treating it as a generic Sweden job
Projects arrive with a class and someone checks it afterwards. Send us the target and we will say where our material sits against it.
05 / Supply
What the route into Sweden actually looks like
| Ships from | Palwal, Haryana, India |
|---|---|
| Arrives at | Gothenburg, then road onward to site |
| Dispatch | 4 to 7 working days |
| Freight | Sea via Gothenburg |
| 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 Gothenburg, then road onward to site. Air freight for samples and urgent quantities.
Questions from Sweden projects
What makes school and classroom acoustics different in Sweden?
Classroom acoustics are regulated, and open plan learning areas make speech intelligibility the design target. Projects arrive with a class and someone checks it afterwards. Send us the target and we will say where our material sits against it.
Where should the budget go first on a Sweden 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 Sweden?
No. We manufacture in India and supply into Sweden. 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 Sweden site?
ships from: Palwal, Haryana, India, arrives at: Gothenburg, then road onward 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
Send a plan and a section, get a real build-up
One drawing gets you a proper answer. Build-up, quantities, a delivered date, and an honest note on anything we think is the wrong approach.