Superior impact sound
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QT - Sound Control Underlayment
Patent No. RE 41,945

QT sound control underlayment (scu) is a flat, resilient rubber underlayment used directly under all floor finishes, yielding exceptional results even under hard surface flooring and over concrete and wood joist construction.

QTscu is available in 48” wide rolls and five standard thicknesses- 2mm to 15mm. Also available with a waterproof membrane or a peel and stick option, QTscu rubber underlayment can be installed under most types of grouted, glued, and floating floors including ceramic tile, stone, marble, brick, pavers, hardwood, engineered wood, laminate, parquet, vinyl, and carpet. Made from 92% resilient recycled rubber and backed by over 200 independent laboratory and field tests, QTscu has been selected and used in some of the best hotels and condominiums in the world.

 QTscu Rolled Good
Performance Attributes
  • Can thin-set tile and stone directly to the product per ASTM C627
  • 5mm thickness QT performs better than 1/2” cork per ASTM E2179
  • Compatible with all floor finishes
  • Fast installation
  • Available in 48” wide rolls and a variety of thicknesses
  • Waterproof membrane and peel-and-stick options available
  • Crack isolation membrane protects ceramic tile, porcelain, and stone from substrate cracks
  • Rated light commercial by the Tile Council of North America
SCU diagrams
Click for larger view Click for larger view

Test Results
Floor
Ceiling
Finish
QTscu
IIC
STC
8" Concrete Slab
NO
Tile
QT4005
50
8" Concrete Slab
NO
Tile
QT4010
53
54
8" Concrete Slab
NO
Tile
QT4012
55
59
8" Concrete Slab
NO
Tile
QT4012
56-F
8" Concrete Slab
NO
Wood
QT4002
54
53
8" Concrete Slab
YES
Wood
QT4002
71
72
7" Concrete Slab
NO
Tile
QT4005
51-F
7" Concrete Slab
NO
Wood
QT4005
58-F
HAMBRO D500
YES
Tile
QT5015
58
61
HAMBRO D500
YES
Wood
QT5015
58
HAMBRO D500
YES
Wood
QT4010
51
54
Open Web-Truss
YES
Tile
QT4006
53
55
Open Web-Truss
YES
Tile
QT4005
56-F
55
Open Web-Truss
YES
Vinyl
QT4005
56-F
Open Web-Truss
YES
Tile
QT4005
58-F
Open Web-Truss
YES
Wood
QT4005
67-F
Open Web-Truss
YES
Tile
QT4010 x 2 layers
54
Open Web-Truss
YES
Carpet
QT4010 x 2 layers
67
TJI-Type
YES
Tile
QT4002
54
57
TJI-Type
YES
Vinyl
QT4005
57
TJI-Type
YES
Tile
QT4002
53
54
TJI-Type
YES
Tile
QT4005
53
57
TJI-Type
YES
Tile
QT4005
55-F
TJI-Type
YES
Vinyl
QT4005
56-F
TJI-Type
YES
Wood
QT4005
64-F
Steel Bar Joist
YES
Tile
QT5015
56-F

Download Test Results Download Basic Installation Overview
  Download Detailed Installation Instructions

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