STC35 vs STC40: Which Soundproof Door Does Your Hotel Need?

STC rating is the standard reference when selecting hotel soundproof doors. Different locations of guest rooms require different sound insulation levels.

STC35 is our best-selling grade for most chain hotels and standard guest rooms. It effectively blocks normal hallway talking, background music and light trolley noise. It balances cost, weight and acoustic performance, ideal for large-scale renovation projects.

STC40–42dB is designed for rooms facing busy corridors, elevators or street sides. This upgraded version uses enhanced multi-layer damping structure, tighter magnetic sealing and upgraded bottom drop seal. It suppresses low-frequency noise and suits high-end boutique hotels and five-star suites.

One important reminder: lab STC data will drop slightly after installation. Proper sealing between the door frame and wall is essential. We supply installation guidelines for our engineering clients.

Share your hotel layout with us, and we will recommend the proper STC grade for your project.