HVAC, plant and machine noise control in Sao Paulo

02 / The build-up

The stack, in the order it is installed

1. 

   Layer 1

   SoundBlanket mass loaded vinyl

   A limp, high density sheet that adds mass to a partition, floor or duct without adding depth. In Sao Paulo, split units and VRF, with condensers in light wells and on facades close to bedrooms.

   Wall, decoupled. Independent stud, membrane between the boards, cavity absorption, two boards. The membrane is one part of a system, never the whole answer.

2. 

   Layer 2

   Wood wool acoustic panels

   Wood fibre bound into a rigid board with an open texture. In Sao Paulo, churches, event halls and auditoriums are large hard rooms carrying amplified music at high level.

   On a cavity. Mounted on battens with an air gap, which is where the low mid performance comes from.

3. 

   Layer 3

   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 Sao Paulo, classrooms are concrete and tile with high ceilings and hard floors, and covered play areas amplify everything.

   Corner loading. Low frequency energy collects in corners, so absorber in the corners does more than the same area spread across a wall.

For a Sao Paulo practice, the useful thing is a detail you can put in a drawing set, not a brochure. See how we support architects.

04 / Room by room

Room by room, on a typical Sao Paulo job

• 

  At source

  Enclosure, barrier or anti vibration mounts at the machine. Concrete frames handle airborne transfer. The complaint is nearly always that the room itself is too live.

  • Soundproofing materials, 2100 kg per cubic metre. 2.5 mm STC 30 at 5.25 kg per sq m, 4 mm STC 34 at 8.4, 6 mm at 12.6
  • Wood wool acoustic panels, 20 mm
  • Ceiling baffles and clouds, Made to the drawing, standard and custom

• 

  In the path

  Duct lining, attenuators and lagging on the first run out of the plant. Street noise and rotor noise reach upper floors through glazing rather than structure, so the facade is where the money goes.

  • 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
  • Ceiling baffles and clouds, Both faces work, which is why suspended area outperforms the same area laid flat

• 

  At the receiver

  Only after the first two, and only for what is left. Hard floors over slabs pass footfall down. The underlay has to go in before the finish, not after the complaint.

  • Soundproofing materials, Mass, then decoupling, then cavity absorption, then sealing
  • Wood wool acoustic panels, 0.30
  • Ceiling baffles and clouds, ASTM C423

Designers get colour, pattern and CNC options with the absorption figure attached to each. See how we work with interior designers.

05 / Supply

Getting it to Sao Paulo, with real dates

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 Santos, then road up to Sao Paulo. Air freight for samples and urgent quantities.

Next step

Tell us the room, we will tell you the build-up

Send what you have. We will give you a layer by layer build-up, a bill of quantities and a date material lands, and we will flag anything in the brief that will not achieve what you want.