SPI 310 – 10mm – 3 ¼” x 20’ Sill Plate Isolation Mat


SPI 310 – 10mm – 3 ¼” x 20’ Sill Plate Isolation Mat

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Our Sill Plate Isolation Mat (FIS) using 5mm or 10mm sound isolation foam can dramatically reduce the acoustic performance of a wall assembly. Sill Plate Isolation is used to help prevent structure borne noise from transmitting through the wall into the areas above and below the partition. Most importantly, it creates a permanent resilient gasket that decouples wall assemblies from the building structure to reduce the transfer of sound and vibration.

is manufactured with reclaimed rubber and is also formulated with high damping acrylic polymers making it a “Green” product for LEED projects. The Sill Plate Isolation pad is manufactured to carefully controlled density standards for trusted long term service. The mat can be installed using the W20R isolation washers for less sound transmission.

Performance Attributes 

  • Fast installation.
  • Unlike fiberglass it is not affected by moisture.
  • Can be used for both bottom and top plates.
  • Factory slit to width and easily field cut to length with utility knife.
  • Available in custom width rolls 5mm and 10mm thicknesses.
  • Can be used for a wide range of loadings (1-50 psi).
  • Continuous resilient support of partition.
  • Unaffected by water.
  • Will not support mold growth.
  • Can contribute toward earning up to 9 LEED.

Additional information

Weight9.09 lbs


  1. Stephanie B. (verified owner)

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