| Item group | Substitution policy |
|---|
| [AC] Sylomer, RSIC clips, Green Glue, silencers, doors, window, panels, traps | NO substitution without written consultant approval (certified spec) |
| Gypsum, steel studs, mineral wool | Equal-or-better with datasheet proof (density, NRC, fire class A1) |
| Finishes (vinyl, carpet, paint) | Local OK if NRC/spec met; zero-sheen paint mandatory |
| Cabling, hardware | Equivalent professional grade; shielded only (S/FTP) for audio |
Acoustic-critical [AC] items define the room's performance — a substitution can fail commissioning. When in doubt, ask the consultant before ordering.