Tired of hearing every footstep from your upstairs neighbors in your NYC apartment? Our complete guide to ceiling soundproofing is your solution. This 4,000-word article, packed with 10 interactive tools, explains the professional methods for blocking both impact and airborne noise. Learn about STC ratings, decoupling, Green Glue, and the real 2025 costs for different soundproofing levels. We also cover the complexities of co-op board approvals, ensuring you can plan your project for a quieter, more peaceful home.