Our innovative soundproof materials for floors (SORI-EN) are developed to most suit "ondol," Korea's traditional heating system, and these are designed to meet high sound blocking, sound absorbing, insulating, and constructing at the same time, compared to those of other companies. Soundproof materials for floors, SORI-EN CLASSIC products are cost - efficient as they reduce the impact sounds projected on the air space by forming the embossed projections on the urethane foam rubber and creating the said air space on the upper area of the slab floor. Soundproof materials for floors, SORI-EN PLUS products are the most cost - efficient as the specially - processed nonwoven fabrics are combined to the existing insulation material, EPS, and excellent in the performance of blocking the noises between floors, compared to those of others. Soundproof materials for floors, SORI-EN BIO products are specially processed using the existing insulation material, EPP, and have good dynamic stability against impacts. Soundproof materials for floors, SORI-EN STYRO products are more efficient for reducing floor impact noises than those of others, and made from the nonwoven fabrics with good thermal conductivity to which the black leads are attached. - Before April 23, 2004: Non applicable - April 23, 2004 ~ June 30, 2005: Slab Thickness - Wall Structure( 180T) - After June 30, 2005 : Slab Thickness - Wall Structure (210T) - Before April 23, 2004: Non applicable - April 23, 2004 ~ June 30, 2005: Slab Thickness - Wall Structure( 180T) - After June 30, 2005 : Slab Thickness - Wall Structure (210T)   (※ Make sure to use the verified soundproof for floors to construct the apartment house        using certified floor materials) Soundproof materials for floors, SORI-EN SENSE products are composed of the basic material, SORI-EN CLASSIC and acoustic absorbents. As the upper materials are excellent in acoustic absorbing, and the lower materials also have the good performance for absorbing impact noises, these products basically blocks the impact sounds between houses which cause noises. Soundproof materials for floors, SORI-EN ACE products are newly released, which radically reduce floor impact sounds, as the embossed projections form an acoustic absorbing layer between the urethane foam rubber and the slab, and naturally develop the air space. Soundproof materials for floors, SORI-EN PRO products are released as new ones which radically reduce floor impact sounds as the embossed projections from an acoustic absorbing layer between the urethane foam rubber and the slab, and naturally develop the dual air space. Soundproof materials for floors,, SORI-EN COMBI products are newly released, which are made from SORI-EN PLUS added to the existing insulation materials, SORI-EN CLASSIC , and these materials are the upgraded products that can reduce light and heavy impact sounds for floors, as well as have good insulation performance. Soundproof materials for floors, SORI-EN ACE Ⅱ products are in complex structure where the sound absorbing later and the sound blocking layer are coupled to the embossed urethane foam rubber, and reduce the floor impact sounds generated from the upper area, especially light and heavy impact sounds.. Soundproof materials for floors, SORI-EN ENONO products are composed of the high strength natural filter coupled to the urethane foam rubber, and are efficient breakthrough products for reducing floor impact sounds as they converse the projected noises into heat. Soundproof materials for floors, SORI-EN MEGA products are composed of the basic material, urethane foam rubber and the acoustic absorber coupled on the upper using thermal fusion. The upper materials are excellent in blocking sounds, and the lower materials are composed of independent - foamed cells, which have good sound absorbing performance for basically block the impact sounds generated between households.