This study aims to analyze the causes of performance variations in floor impact sound insulation in apartment buildings following the implementation of the post-construction verification system, and propose improvement measures at the floor finishing stage. Field measurements were conducted in occupied apartment units using wooden flooring and stone tile finishes under identical floating floor structures, with a focus on the effects of different types of adhesives. For wooden flooring, epoxy-based adhesives resulted in changes of -1 dB to 1 dB in heavyweight impact sound and 0 dB ~ 2 dB in lightweight impact sound. In contrast, polyurethane-based adhesives achieved reductions of 0 dB ~ 3 dB and 2 dB ~ 6 dB, respectively. For stone tile finishes, low-polymer cement adhesives increased light-weight impact sound by 4 dB ~ 5 dB, while high-polymer cement adhesives reduced it by 4 dB.
Koo et al. (Wed,) studied this question.