GRAMM CONCRETESoundBlok® noise barriers are made of a proprietary material consisting of organic softwood shavings processed to an acoustically engineered size and bonded together under pressure with Portland cement. GRAMM CONCRETESoundBlok® is highly sound absorptive, porous, rigid, non-combustible, thermally insulating and freeze-thaw resistant.

GRAMM CONCRETESoundBlok® noise barriers are panel and post systems. They are engineered in-house and specify the size for posts and the depth and diameter of footings. Standard steel posts or optional concrete posts can be accommodated.

Our standard systems are noise absorptive on both sides. They can also incorporate solid noise reflective or transparent elements, as well as integrated traffic barriers and retaining wall panels.


Each panel is made of high Strength concrete, with acoustical absorption. The size and pattern of the perforations are designed to protect and maintain the sound-absorptive capability of the acoustic fill inside the panels.

The reverse side of the panel facing away from the noise source, can be manufactured to offer a reflective or absorptive surface depending on the site requirements. The panels can be manufactured in a variety of architectural textures, patterns and colours. Due to the high density and strength of the CONCRETESoundBlok®, the system is well suited for areas where there are grade differences between the two sides of the barrier.

A unique design feature of the CONCRETESoundBlok® 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, the panels can be changed in a safe and efficient way.


  • Class = A4,B4
  • Acoustic Performance = DLʀ 44dB, Dlα 20dB
  • Design Life of barrier = 60 years plus
  • Design Life of Steel Posts = 60 + Years
  • Barrier Heights = From 0.5m – 10m+ (Bespoke heights available on request)
  • Bay Widths = From 1.0m – 4.0m
  • Weight = 205kg/m2
  • Material = Concrete
  • Finish = Concrete (Various colours available)

Foundation types

Gramms CONCRETESoundBlok® noise barrier system can be either set into concrete foundations or 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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