How Long Does Post Construction Floor Cleaning Take in New York City You finally wrap up a renovation. The contractors leave, the dust settles literally and what’s left behind doesn’t quite match the polished vision you had in mind. Floors are often the biggest giveaway. Fine dust clings to every corner, adhesive marks show up under certain lighting, and even brand-new tiles can look dull. That’s when the real question comes up: how long will it take to get everything properly cleaned?