Lotte Engineering & Construction announced on the 21st that its jointly developed 'two types of floor impact sound insulation structure' with Anos, a specialized company for inter-floor noise insulation materials, has received the highest rating of Level 1 performance for both heavy and light impact sounds from the Korea Institute of Civil Engineering and Building Technology (KICT).
Floor impact sounds that cause inter-floor noise are classified into heavy impact sounds, which occur from heavy and large impacts, and light impact sounds, which occur when hard and light objects fall.
According to current standards, if heavy and light impact sounds are below 37 decibels (dB), a Level 1 sound insulation performance can be obtained.
The floor structure that received the Level 1 grade this time successfully applied vibration-blocking metal coil springs to the floor cushioning material, effectively reducing both impact and vibration.
Lotte Engineering & Construction developed a floor structure using expanded polystyrene (EPS) and synthetic rubber (EVA) last year, receiving Level 2 and Level 3 certifications from the Korea Land & Housing Corporation (LH), and following up with this Level 1 floor impact sound insulation structure certification, it has secured all Level 1 to 3 floor impact sound insulation certificates.
A representative from Lotte Engineering & Construction noted, 'We plan to conduct additional verification and analysis to ensure that the floor structure recognized this time can fully demonstrate its performance in real life.'