Acoustic insulation against airborne and impact noise of floors and slabs in renovation using: 5 mm expanded polyethylene foam sheet, type TEXSILEN 5 mm, placed end-to-end and joints sealed with adhesive tape; synthetic soundproofing sheet with a polymer base and density 2,000 Kg/m3, viscoelastic, 7 Kg/m2 and 3.5 mm thick, type TECSOUND® 70, placed on Texsilen with joint breakers and end-to-end, sealing the joints with adhesive tape; finished with 15 mm parquet, reduction of the overall pressure level of standardized impact noises LnTw = 57 dB and DnTA = 50 dBA