DL E&C has applied the floor structure, which reduced the inter-floor noise and recognized as ‘grade 2’ heavyweight impact sound, to the actual construction site for the first time in the construction industry.
DATE 2024.10.07
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DL E&C has applied the floor structure, which reduced the inter-floor noise
and recognized as ‘grade 2’ heavyweight impact sound,
to the actual construction site for the first time in the construction industry.
and recognized as ‘grade 2’ heavyweight impact sound,
to the actual construction site for the first time in the construction industry.
A DL E&C employee is conducting a test on heavyweight impact sound
at an apartment construction site.
at an apartment construction site.
- first commercialization of ‘grade 2’ floor structure, whose performance was evaluated in the field, not in a laboratory
- concentrating self-developed patented technology, and realizing groundbreaking noise-insulating performance
- “We will strive to maintain industry’s best technology related to inter-floor noise.”
DL E&C has applied the floor structure, which reduced the inter-floor noise and recognized as ‘grade 2’ heavyweight impact sound, to the actual construction site for the first time in the industry.
DL E&C announced on the 2nd that it is currently constructing and applying the ‘D-Silent’ floor structure to ‘eLife Geomdan Well County’ site located in Seo-gu, Incheon.
‘D-Silent’ floor structure was recognized for its noise insulation performance at ‘Grade 2’ heavyweight impact sound in evaluating performance of ‘floor impact sound’ conducted by Korea Land and Housing Corporation (“LH”) in 2021. This was the highest level of performance in the industry based on the field performance evaluation at the time, and it was the first time that the floor structure with ‘grade 2’ heavyweight impact sound has been applied on a large scale to the apartment complex in Korea. The floor structure with ‘grade 3’ heavyweight impact sound has been applied to most of existing apartments.
DL E&C integrated its own 12 patented noise-reducing technologies to develop the ‘D-Silent’ floor structure. It unveiled the differentiated technology with a 5-stage sound insulation structure, including high-performance crack-resistant special mortar, a double air-layer floor buffer material developed by a technical partnership with BASF in Germany, and a vibration-proof concrete slab.
DL E&C deployed doctorial-level researchers and acoustic experts in building structure and materials to reanalyze all aspects of inter-floor noise from the beginning, including structural system, building materials and soundproofing materials, in order to complete these technologies.
The ‘grade 2’ heavyweight impact sound, ‘D-Silent’ floor structure, implements noise insulation equivalent to the low-noise operating mode of a household air conditioner (41~43 dB). In particular, since the performance of this technology was recognized in the field, not in a laboratory, it is expected that residents will be highly satisfied with the noise-reducing effect. Previously, even if ‘grade 2’ heavyweight impact sound was recognized in a laboratory, the performance was limited to the grade 3 or 4 when applied to the actual site.
An official from DL E&C said “It is highly significant that we have applied the floor structure, which has been recognized as ‘grade 2’ in the field performance evaluation, not in a laboratory, to the actual construction site for the first time in the industry. We will continue to strive to maintain the industry’s best technological competitiveness related to inter-floor nose.”
In the meantime, DL E&C established Korea’s first technical research institute in 1980, and began research on inter-floor noise. In 2006, it established the first architectural environment research center in Korea to demonstrate the performance of houses, and has been conducting various studies. In the last 5 years, the Company has invested 81 researchers and KRW4.5 billion of development costs, focusing on the development of technologies and securing more than 20 patents.
In particular, the Company developed and commercialized the ‘D-Silence Service’ that alerts residents when inter-floor noise occurs. This technology uses sensors installed on the walls of each apartment unit to detect vibrations above a certain threshold, and to send automatic alerts to wall pads and mobile devices. It is expected to greatly contribute to the settlement of disputes between residents, alerting residents who caused the inter-floor noise, and providing objective data.
