SOUND-INSULATING FLOOR STRUCTURE FOR BUILDING CONSTRUCTION

摘要

PROBLEM TO BE SOLVED: To provide sound-insulating floor structure for construction, in which sound-insulating performance to a lightweight impact sound can be improved. SOLUTION: A soft synthetic-resin foamed board 3 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, and a semirigid synthetic-resin foamed board 5 and an under-laying material 6 and a flooring material 7 are laid on the soft synthetic-resin foamed board 3 in a laminated shape in the order under the state, in which a levelling material 4 is interposed.