Stop Interfloor Noise: Daelim Applies for Patent on Triple Floor Structure

[Asia Economy Reporter Onyu Lim] Daelim Industrial announced on the 12th that it has developed a floor structure capable of reducing inter-floor noise threefold and has filed a patent for it. Daelim designed this method by analyzing the impact patterns of footsteps from adults and children on the floor. Through this, they succeeded in reducing heavy impact noise compared to the existing cushioning structure using 60mm soundproofing material.

Floor impact noise causing inter-floor noise is classified into lightweight impact noise caused by hard and light impacts and heavy impact noise caused by heavy and large impacts. The noise that often causes disputes between neighbors is mainly heavy impact noise generated by adults' footsteps or children jumping.

Daelim's technology is a filter-type method that layers three layers on top of the concrete slab, the basic framework of apartment floors, to filter inter-floor noise. Compared to existing methods, the mortar layer is arranged in two layers and constructed twice as thick. Mortar is a material made by mixing cement and sand, which serves to make the floor surface flat and solid. When inter-floor noise occurs, the topmost cement finishing mortar layer, designed to prevent cracks, first absorbs the impact noise and prevents cracks. Then, the vibration-absorbing mortar layer directly below absorbs noise and floor vibrations a second time. At the bottom, a high-performance cushioning material produced through a technical partnership with BASF Germany is closely attached to the concrete slab to absorb the resonance phenomenon and noise lastly.

Moreover, by applying the mortar layer in two separate steps, it is possible to sufficiently secure the thickness and flatness (the degree of flatness and smoothness of the floor) of the finishing mortar, which has recently become an issue. Additionally, there is an advantage of improving floor heating performance. This technology has completed performance verification at the LH Housing Performance Research and Development Center's demonstration test building.

A Daelim Industrial official said, “We succeeded in further reducing heavy impact noise by incorporating a new concept that had not been attempted before,” and added, “We continue research and development to reduce the inconvenience residents experience due to inter-floor noise as much as possible.”

This content was produced with the assistance of AI translation services.