• Annoyingly I never got around to measuring the room before we moved everything out to do work, though I think there will be an opportunity to do that before installing rockwool. The stretch ceiling is a one-time thing, once it’s up that’s it, so it’s a case of working out how much rockwool to install above…

  • Depending on how much height you can lose, you can get good results with an air gap ie mounting the trap away from the hard surface.
    The wall/ceiling is a null point, so there’s more energy to absorb if you can move away from it.

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