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The first type of the underlayment Natural Cork and its the most popular acoustical underlayment. It can be used for any type of wood floors, but its used as follow:
1. For solid floors unfinished and prefinished over concrete (high risers and condos) where they request a sound barrier and you have a concrete sub floor, we need to glue down the Ό cork and then we glue to the cork two layers of 3/8 plywood cdx (we do not recommend to use Ύ plywood first cause we are using the cross ply system and that give more stability to the underlayment and also some of the plywood could be so curb that will not stay 100% attached to the cork, for more information please call) which will be interconnected with screws, followed by the flooring covering.
2. For solid floors unfinished and prefinished over plywood (houses, commercial places and others) we staple down the Ό cork and then we apply the 15 pound asphalt paper, followed by the flooring covering.
3. For engineered floors unfinished and prefinished over concrete (most of the time high risers of below ground areas) we glue down the Ό cork, followed by the flooring covering.
The acoustical ratings and the specs are below. We need to have this cause many of the clients knows what rating they need for their building
Physical Properties
Minimum Density: 180 kg/m3
Compression Percent: 25-35
Recovery Percent: >=75
Boiling Water: No Desintegration
Tensile Strength: 5-10 kg/cm2
Thermal conductivity (kcal/mh c): 0.0410
Acoustical Ratings for 1/4" Cork Underlayment
Ceramic Finish: STC - 53, IIC - 56
Wood Finish: STC - 54, IIC 59
Silent Stride was originally designed for engineered and laminate-style flooring. Although, now is also used
under some nail-down and floating hardwood products. The revolutionary Silent Stride underlayment smoothes out
little sub floor imperfections. Not only does it dampen ambient sound in the room it's installed in, but it also
inhibits sound from traveling into the room below. Although it is promoted as an upgrade underlayment taking the
place of poly foam, it doesn't carry a heavy upgrade price when compared to cork or rubber.
In recent head-to-head Sound Transmission Loss tests, Silent Stride outperformed both cork and rubber in
the majority of test sound frequencies. Certified field sound tests were performed on an installation over a
standard concrete sub floor, and received an FIIC score of "60".
In addition to its sound deadening benefits, the absorbing action of the synthetic fibers together with the
attached vapor barrier provides superior moisture protection that is backed by a Limited Lifetime warranty. Also
Silent Stride helps keep floors warm in the winter and cool in the summer. For more information
email us or give us a call at
(773) 406-5670.
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