For projects in Cape Town
HVAC, plant and machine noise control in Cape Town
Noise with a source. Almost every honest fix is at the machine, the duct or the plant room, and almost nothing useful happens by lining the far wall of the occupied space. Split units and generator sets, with backup generation running often enough that its enclosure matters as much as the HVAC.
- At source
- Enclosure, barrier or anti vibration mounts at the machine.
- In the path
- Duct lining, attenuators and lagging on the first run out of the plant.
- At the receiver
- Only after the first two, and only for what is left.
- Quote
- From a plan and a section, within 48 hours
01 / What it is
The product, described honestly, for a Cape Town brief
Noise with a source. Almost every honest fix is at the machine, the duct or the plant room, and almost nothing useful happens by lining the far wall of the occupied space.
Split units and generator sets, with backup generation running often enough that its enclosure matters as much as the HVAC.
Work reaching us from Cape Town is mostly hotels and restaurants, heritage conversions, offices, apartments, schools, studios.
- The port is at the city Direct sea into Cape Town avoids the long inland haul, which makes the landed cost and the date both easier to hold.
- Heritage fabric stays put Older buildings in the city cannot be structurally altered. Work has to be internal, shallow and ideally reversible.
- Hospitality is the market Hotels and restaurants where the room is part of what the guest is paying for, judged when it is completely full.
- At source Enclosure, barrier or anti vibration mounts at the machine.
Full specification
Thickness, density, NRC by frequency, fire class, standard sizes and build-up detail for HVAC and plant noise control are on the main product page. This page covers what that means for a project in Cape Town.
02 / The build-up
The stack, in the order it is installed
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Layer 1
Soundproofing materials
The blocking side of the range taken together: mass loaded vinyl, resilient layers, cavity absorption and the build-ups they belong in. In Cape Town, split units and generator sets, with backup generation running often enough that its enclosure matters as much as the HVAC.
Resilient bar. Where a full independent leaf will not fit. Effective, and very easy to short circuit with one wrong screw.
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Layer 2
Acoustic foam and BassBloc
Open cell foam shapes for high frequency control, and BassBloc, a high density absorber built for the low mid range where ordinary foam does nothing. In Cape Town, church buildings and community halls are large hard rooms carrying amplified music and speech at high level.
First reflection points. Mirror trick placement on side walls and ceiling, which is a handful of panels rather than a lined room.
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Layer 3
Ceiling baffles and clouds
PET felt suspended from the soffit, vertically as baffles or horizontally as clouds. In Cape Town, classrooms are hard walled with high ceilings and large class sizes, and school halls double as assembly and performance spaces.
Vertical baffles. Hung on edge in rows. Both faces absorb, so coverage figures based on plan area understate them.
We would rather argue about the build-up at design stage than on site. See how we support architects.
03 / Local conditions
What we see driving Cape Town briefs
- The port is at the city
Direct sea into Cape Town avoids the long inland haul, which makes the landed cost and the date both easier to hold.
- Heritage fabric stays put
Older buildings in the city cannot be structurally altered. Work has to be internal, shallow and ideally reversible.
- Hospitality is the market
Hotels and restaurants where the room is part of what the guest is paying for, judged when it is completely full.
- Wind and coastal damp
PET felt does not absorb moisture or feed mould, which matters on exposed coastal elevations.
- Plant and HVAC
Split units and generator sets, with backup generation running often enough that its enclosure matters as much as the HVAC.
04 / Room by room
Where the money goes on a Cape Town project
-
At source
Enclosure, barrier or anti vibration mounts at the machine. Direct sea into Cape Town avoids the long inland haul, which makes the landed cost and the date both easier to hold.
- SoundBlanket mass loaded vinyl, 2100 kg per cubic metre
- Soundproofing materials, 1800 x 900 x 20 mm, 100 kg per cubic metre, NRC 0.85
- Wood wool acoustic panels, 400 kg per cubic metre
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In the path
Duct lining, attenuators and lagging on the first run out of the plant. Older buildings in the city cannot be structurally altered. Work has to be internal, shallow and ideally reversible.
- SoundBlanket mass loaded vinyl, STC 30, 5.25 kg per sq m
- Soundproofing materials, Mass, then decoupling, then cavity absorption, then sealing
- Wood wool acoustic panels, 0.30
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At the receiver
Only after the first two, and only for what is left. Hotels and restaurants where the room is part of what the guest is paying for, judged when it is completely full.
- SoundBlanket mass loaded vinyl, STC 34, 8.4 kg per sq m
- Soundproofing materials, ASTM E90 for the barrier, ASTM C423 for the absorber
- Wood wool acoustic panels, ASTM C-423 and EN ISO 354
If the visual is fixed and the room still has to perform, that is a solvable problem and a conversation worth having early. See how we work with interior designers.
04 / Conditions
The Cape Town climate decides the material list
Cape Town is hot summers, mild winters and a distinct wet season, and that narrows the material list before acoustics is discussed.
PET felt handles the wet months without absorbing moisture or feeding mould. Timber and wood wool want a ventilated cavity and a stable indoor RH.
The failure we design against here is wet-season humidity behind linings.
Where a consultant is already engaged on a Cape Town project, we supply to their specification and send the test reports rather than describing them. More on working with acoustic consultants.
06 / Read this first
Six mistakes that turn into a second fit-out
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Absorption on the office wall for a plant room problem
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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Lagging a duct that is carrying the noise as breakout from the fan
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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Ignoring structure borne vibration through the mounts
This is the one that comes back as a second fit-out rather than a snag.
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Treating it as a generic Cape Town job
Direct sea into Cape Town avoids the long inland haul, which makes the landed cost and the date both easier to hold.
05 / Supply
How material reaches a Cape Town site
| Ships from | Palwal, Haryana, India |
|---|---|
| Arrives at | Cape Town, then a short road run to site |
| Dispatch | 4 to 7 working days |
| Freight | Sea into Cape Town |
| 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 direct into Cape Town, then a short road run to site. Air freight for samples and urgent quantities.
Questions from Cape Town projects
What makes HVAC, plant and machine noise control different in Cape Town?
Split units and generator sets, with backup generation running often enough that its enclosure matters as much as the HVAC. Direct sea into Cape Town avoids the long inland haul, which makes the landed cost and the date both easier to hold.
Where should the budget go first on a Cape Town project?
At source. Enclosure, barrier or anti vibration mounts at the machine. In the path. Duct lining, attenuators and lagging on the first run out of the plant.
Do you have an office or installation team in Cape Town?
No. We manufacture in India and supply into Cape Town. 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 Cape Town site?
ships from: Palwal, Haryana, India, arrives at: Cape Town, then a short road run to site, 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?
Absorption on the office wall for a plant room problem. Lagging a duct that is carrying the noise as breakout from the fan.
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
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.