Vehicle restraint systems and noise barrier walls normally are considered separately. Therefore, more space is required and the efficiency of noise reduction is reduced. Gramm Barriers has shown that compromises are no longer necessary and com-bines those two systems to one CE-certified solution, the COMBISoundBlok® series.

The integrated noise barrier COMBISoundBlok® is designed as a free-standing, T-shaped wall element, with the New Jersey profiled safety barriers sitting on its traffic-facing footplate.

The COMBISoundBlok® integrated noise barrier is designed as a free-standing, T-shaped wall element. The profiled safety barrier sits on its traffic-facing footplate. Both system parts act as independent chains linked to each other via the proven GRAMM couplings.

It is not only the barrier we develop, for GRAMM it is the holistic solution. Saving money and time is on our task list – right after saving lives.


The restraint system respectively noise barrier COMBISoundBlok® acts as safeguarding for the verge on motorways and dual carriageways. Due to the noise absorbing material laminated to the surface of the wall, it additionally works as a high-grade sound insula ion system.

Main features

  • High containment level (H2)
  • Extremely small system width of only 105cm tested passenger protection (ASI B)
  • Small working width (W5)
  • Combination of noise barrier and restraint system variable height of wall 250cm – 350cm
  • Tested for H2 and H4b
  • Free-standing, no need for expensive foundations
  • Space-saving installation due to narrow working width
  • Increased effectiveness by positioning close to the noise source. Fast and easy to install

Tested safety is what you expect from a modern vehicle restraint system. Tested absorption and sound insulation is what you require from a noise barrier. The DB LSW series combines both in the most versatile way. The COMBISoundBlok® is designed for the roadside H2 | W4 | ASI B.

For GRAMM, the CE-certification is obligatory, no matter if it is concerning EN 1317 safety or EN 14388 acoustics.


  • Class = A4,B4
  • Acoustic Performance = DLʀ 44dB, Dlα 20dB
  • Design Life of barrier = 60 years
  • Design Life of Steel Posts = 60 + Years
  • Barrier Heights = From 2.0m – 4.0m (Bespoke heights available on request)
  • Bay Widths = From 1.0m – 4.0m
  • Weight = 205kg/m2
  • Material = Concrete
  • Finish = Concrete (Various colours available)

Foundation types

Concrete footings or piled foundations are not required.

Why Choose Gramm Barrier Systems?

Gramm Barrier Systems are one of the only noise barrier specialist in the country give a 30 year guarantee on all our Acoustic Fencing, Acoustic Barriers & Noise Barriers. We also confirm that the barriers are designed to be maintenance free for the full 30 years.

Some of our noise barrier range is fully CE Marked and compliant for use on Highways England schemes under CPR 2013. Also schemes using Sector Scheme 2C, for the supply and installation of Environmental Barriers

All ours materials and installations are to such a high standard we are the only noise barrier specialists to have all our works backed and insured by the government.

Gramm Barriers Noise Barrier systems give the highest level of sound reduction on the market which is why our product’s are specified on many major road and rail schemes.

Gramm Barrier Systems Ltd are fully committed to the highest level of customer service, professionalism and health & safety for every installation. Utilising quality materials in manufacturing, the highest level of expertise, Gramm aim to maintain a quality product that is secure and reliable.

Get a FREE quote

Speak to one of our experts to obtain a free quote on

08442 259002 / 01323 872243

Contact us