Immission benchmarks »outdoor«:

  • Commercial only, industry 70 dB(A)
  • Primarily commercial, daytime 65 dB(A), nights 50 dB(A)
  • Commercial and residential, daytime 60 dB(A), nights 45 dB(A)
  • Primarily residential, daytime 55 dB(A), nights 40 dB(A)
  • Residential only, daytime 50 dB(A), nights 35 dB(A)
  • Spas, hospitals, daytime 45 dB(A), nights 35 dB(A)

Immissions benchmarks »indoors«:

  • Residential, daytime 35 dB(A), nights 25 dB(A)

Wall thickness: UF series (reduction values)

10 cm – reduction value 47 dB
12 cm – reduction value 50 dB
14 cm – reduction value 53 dB
16 cm – reduction value 55 dB
20 cm – reduction value 58 dB

Further measures include double walls or inner linings with perforated plate and sound insulation.


We can provide you with single-leaf doors with sound insulation dimensions ranging from 18 to 40 dB. Up to 55 dB can be achieved with single-leaf doors and 52 dB with double-leaf doors using special products. The strictest requirements can be met with a double door in a double-leaf partition wall: up to 66 dB. It should be noted that sound immission sources within frequency ranges can differ, and sound insulating dimensions of components can sometimes drop considerably at lower frequencies. The following are images of two examples:


The large supply and waste air openings pose a particular challenge for sound insulation, these being required to meet the high air requirement of motors for both combustion and cooling. Measures range from ventilator elements with downstream sheet metal channels with sound insulation (mounted under the ceiling or on the exterior wall) to concrete channels with integrated sound insulation splitters. These can be positioned on the modular unit like a roof element, sectioned with a solid false floor or positioned as a prefabricated construction in front of the outer walls.

Sound insulation with soil

The favourable characteristics of modular units enable the achievement of a very simple sound insulation solution: installation in soil. Earthen walls can be heaped up against a building erected at ground level, while a building located on a slope can be partially or totally integrated in the slope, being buried as a vault station. These building layouts can also be advantageous for integration in conjunction with landscaping or townscaping requirements (e.g. embedding in greenbelt or leisure areas, sealing off from surroundings sensitive to noise pollution, integration in residential areas in the same manner as underground garages under public traffic thoroughfares.