Floor Coverings
The Hambro® assembly has an Impact Insulation Class (IIC) rating of 30 on bare concrete, similar to a solid 6" slab. Impact sound originates when one body strikes another, such as in the case of footsteps, hammering and objects falling.

Most bare structural floor systems do not meet IBC's minimum IIC rating of 50. To achieve an IIC rating of 50 or more, an underlayment/substrate material is suggested to isolate the structural floor from hard surface flooring. We recommend...
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