Sound Reducer

Sound Reducer is engineered for use directly under most floor finishes, yielding exceptional impact sound insulation results, even under hard surface flooring for concrete or wood-framed construction.

Also available with a waterproof membrane, Sound Reducer can be installed under most types of grouted, glued, and floating floors, including hard tile, hardwood, engineered wood, laminate, LVT, and carpet. Get a Sample

Product Specs

Product Features

  • Fast, hassle-free installation
  • Compatible with most floor finishes
  • Available in 48-inch wide rolls and a variety of standard and custom thicknesses
  • Vapor barrier option available
  • Doubles as a Tile Council of North America (TCNA)-rated high performance crack isolation membrane
  • Can thin-set tile directly to 2 and 5 millimeter (mm) thicknesses per ASTM C627
  • Compatible with radiant heat flooring systems
  • Five mm thick Sound Reducer performs better than 12 mm cork per ASTM E2179
  • Backed by more than 400 independent laboratory and field tests
  • Made in the USA

Product Details

  • 2mm x 48” W x 75LF rolls
  • 5mm x 48” W x 30LF rolls
  • 10mm x 48” W x 15LF rolls

Test Results

Available in three options, the Sound Reducer collection brings the simplicity and performance of the field's most trusted sound control underlayment to architects and designers.

Product Thickness Delta IIC Rating (ASTM E2179)
Sound Reducer 2 2mm (0.08-inch) thickness Up to 19 decibels (dB)
Sound Reducer 5 5mm (0.20-inch) thickness Up to 23 decibels (dB)
Sound Reducer 10 10mm (0.40-inch) thickness Up to 26 decibels (dB)

TJI Frame

Finish Underlayment(s) Ceiling Gypsum IIC STC* Details Test(s) PDF
Tile 5mm Yes 1" 50 60 Weyerhaeuser 9.5" TJI with Flak Jacket Fire Protection NGC 7013055, 5013034 --
Wood 5mm Yes 1" 50 58 Weyerhaeuser 9.5" TJI with Flak Jacket Fire Protection NGC 7013056, 5013035 --

Wood Truss

Finish Underlayment(s) Ceiling Gypsum IIC STC* Details Test(s) PDF
LVT 2mm  Yes 1" 50 63 2mm beneath gypsum concrete ATI C8706 05-113-11-R0
LVT 2mm, 2mm Yes 1" 52 63 2mm above and beneath gypsum concrete ATI C8706 02-113-11-R0
LVT 5mm, 2mm Yes 1" 53 63 5mm above, 2mm beneath gypsum concrete ATI C8706 03-113-11-R0
LVT 10mm, 2mm* Yes 1" 53 63 10mm above, 2mm beneath gypsum concrete ATI C8706 04-113-11-R1
Laminate 2mm Yes 1" 53 63 2mm beneath gypsum concrete ATI C7016 01-113-11-r0 --
Ceramic Tile 5mm Yes None 52 63 5mm beneath 8mm cement board ATI D0875.02-113-11-R0

* Neither LVT nor tile over 10mm Sound Reducer are considered recommended systems, but this test report is provided as an indication of acoustic performance.

Wood Joist

Finish Underlayment(s) Ceiling Gypsum IIC STC* Details Test(s) PDF
Tile 5mm Yes No 56 NGC 7002038 --
Tile 10mm* Yes No 59 NGC 7002041 --
Wood 5mm Yes 1" 51 NGC 7002053 --

* Neither LVT nor tile over 10mm Sound Reducer are considered recommended systems, but this test report is provided as an indication of acoustic performance.

2.5" Concrete with Metal Joist

Finish Underlayment(s) Ceiling Gypsum IIC STC Details Test(s) PDF
Wood 10mm Yes No 51 54 Hambro D500 composite floor system NGC 7006005, 5006005 --

5.5" Concrete with Metal Joist

Finish Underlayment(s) Ceiling Gypsum IIC STC Details Test(s) PDF
Tile 2mm Yes No 51 56 22 Gauge Epic Metal's Epicore MSR floor pan NGC 7009063, 5009041 --

6" Concrete Slab

Finish Underlayment(s) Ceiling Gypsum IIC STC Details Test(s) PDF
LVT 2mm No No 50 54 ATI C8707 02-113-11-R1
LVT 5mm No No 52 54 ATI C8707 03-113-11-R1
LVT 10mm* No No 55 54 ATI C8707 04-113-11-R1
Bamboo 5mm No No 51 NGC 7012005 --

* Neither LVT nor tile over 10mm Sound Reducer are considered recommended systems, but this test report is provided as an indication of acoustic performance.

7" Concrete Slab

Finish Underlayment(s) Ceiling Gypsum IIC STC Details Test(s) PDF
LVT 2mm No No 52 57 ATI C6377.01-113-11 --
Bamboo 2mm No No 54 55 ATI C5673.02-113-11 --
Bamboo 5mm No No 54 55 ATI C5673.02-113-11 --
Laminate 2mm No No 58 56 ATI C5673.01-113-11 --
Laminate 5mm No No 58 55 ATI C5673.02-113-11 --

8" Concrete Slab

Finish Underlayment(s) Ceiling Gypsum IIC STC Details Test(s) PDF
Tile 5mm No No 50 NGC 7006028 --
Tile 5mm Yes No 57 62 NGC 7006099, 5006067 --
Bamboo 2mm No No 53 NGC 7012004 --
Wood 2mm No No 54 53 NGC 7005072, 5005033 --
Wood 2mm Yes No 72 72 NGC 7004004, 5004001 --

Wood Frame Assembly

Concrete Slab
  1. Floor Finish
  2. Approved Adhesive
  3. Sound Reducer
  4. Approved Adhesive
  5. Gypsum Concrete
  6. Underlayment
  7. Subfloor
  8. Wood Framing
  9. Insulation
  10. Resilient Channel
  11. Suspended Ceiling

Concrete Slab

Concrete Slab
  1. Floor Finish
  2. Approved Adhesive
  3. Sound Reducer
  4. Approved Adhesive
  5. Concrete Slab