SIDERISE EW – Cavity Barriers and Fire Stops for Masonry External Walls

SIDERISE EW systems have been developed to provide a simple and easy to install method of sealing external wall cavities for masonry constructions.

  • Fire resistance: up to 2 hours
  • Sound reduction: up to 25dB (Rw)
  • Integral smoke barrier
  • Resilient to accommodate site tolerances without cutting
  • Certifire 3rd Party Approval


The standard range has been optimised to include options of materials that are cost-effectively matched to suit the specific performance criteria for all fire stopping requirements.

Additionally, the products have excellent sound reduction qualities which can be used to combat unwanted noise via flanking transmission.

These products represent an ideal combination of fully qualified performance, practical installation and cost effectiveness.

Note: This product was previously known as Lamatherm EW systems – cavity barrier, fire stop and acoustic barrier solutions for external walls.