SOUND-INSULATING FLOOR STRUCTURE FOR BUILDING CONSTRUCTION

摘要

PROBLEM TO BE SOLVED: To provide a sound-insulating floor structure for construction, in which sound-insulating performance to a lightweight impact sound can be improved. SOLUTION: A floor backing material 4 consisting of a soft synthetic-resin foamed board having a dynamic spring constant from 1×10<6> N/m<3> to 10×10<6> N/m<3> is installed onto a concrete slab 2 under the state, in which a levelling material 3 is interposed, and an asphalt vibration-damping mat 5 and a flooring material 6 are laid on the floor backing material 4 in a laminated shape in the order.