Gramm Barrier’s METASoundBlok® Noise Barrier system has been specially designed to reduce noise generated by road and rail traffic.

A fully CE compliant system – METASoundBlok® design criteria uses the noise signature of road and rail traffic as a reference, subsequently adapting the barrier’s noise abatement properties to optimise its overall efficiency.

Likewise, the design seeks to optimise the panel’s mechanical performance by fitting it with two deep guiderails to improve its mechanical ability and withstand additional pressure caused by passing vehicles and trains.


Gramm Barriers METASoundBlok® are made from galvanised steel plating which can be powder coated to any shade of RAL colour. The panels can also be finished in a galvanised finish. It is a fully CE compliant system for use on road schemes under CPR 2013.

The inside of the Metal Noise Barrier panel is made up of sound absorbing mineral wool to achieve the highest A5 noise reduction rating.

The inner face of the Metal Noise Barrier panel (Directed at the noise source) has holes over 35% of the surface area to provide noise absorption, while the outer face is a plain reflective panel. The METASoundBlok® panels are then installed into steel RSJ noise barrier posts in 500mm increments to achieve the desired overall height. Panels can span various lengths to suit individual project requirements up to 5 M in length.

A unique design feature of the METASoundBlok® barrier construction is that individual panels can be removed and replaced. Panels are not bolted, welded, or otherwise permanently fastened to each other or to the support posts (Top security fixing added if required). Should replacement be called for as a result of structural damage, no more than three workmen using ordinary hand tools will be able to do the job. The light weight (22.0kg/m2) of the noise barrier panels also make them the prime choice for barrier construction atop existing bridges, overpasses or other elevated transit structures which cannot support heavier alternative products.



  • Class = A5,B4
  • Acoustic Performance = Dlα 20dB, DLʀ 28dB
  • Design Life of barrier = 40 years
  • Design Life of Steel Posts = 60 + Years
  • Barrier Heights = From 0.5m – 10m+ (Bespoke heights available on request)
  • Bay Widths = From 1.0m – 5.0m
  • Weight = 22.0kg/m2
  • Material = Metal
  • Finish = Powder Coated or Galvanised.

Foundation types

Gramms METASoundBlok® noise barrier system can be either set into concrete foundations, bolted down to individual concrete pads or a continuous concrete strip/pad.

Fixing methods

a) Galvanised steel or PPC posts with baseplates can be fixed to concrete surfaces using chemfix resin anchors or cast in cradles.
b) Steel posts can be set into augered or bucket dug concrete foundations.

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.

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08442 259002 / 01323 872243

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