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Under Ballast Mats

Pandrol’s Under Ballast Mats are continuous resilient mats for ballasted tracks designed to provide vibration mitigation and increase track quality.

The Under Ballast Mats are installed directly beneath the ballast bed which may offer vibration isolation and protection of the track components. This layer of protection can reduce the frequency of required maintenance over the lifetime of the railway.

The Under Ballast Mats are made of high quality resin-bonded rubbers. When used for vibration attenuation purposes and depending on design parameters,  Under Ballast Mat solutions can typically achieve attenuation levels of 15 to 20 dBv with reduced resonance frequency. As protection mat, the Under Ballast Mats improve the load distribution in the track leading to a reduction of the stresses in the ballast and other track components.

Technical Features

  • Water permeable
  • Compatible to special track works such as man-holes, pipes and drainage systems
  • Excellent mechanical and chemical properties
  • Can be supplied in rolls or sheets
  • Contingency solution of track stiffening by sand ingress
  • Increased protection of track foundation structures (e.g. bridges and viaducts)


  • Quick and easy installation
  • Wide range of stiffness available
  • Track quality improvement, ballast degradation reduction and increased longevity of the other track components
  • Savings in track maintenance time and costs
  • Possibility of ballast layer reduction up to 25cm thickness
  • Few components eco-friendly system
  • No need to close joints between adjacent mats
  • Easy and reliable solution for build-up of transition zones

Key Facts

Sustainable Resilient Systems

Under Ballast Mats