How much does a downlight fitted in an 80mm hole in a plasterboard ceiling reduce the soundproofing of the ceiling?
I have read that part E of the building regulations mandate some sort of repair to the acoustic barrier should you cut a hole in the ceiling. But is this only for new buildings?
Tlc-direct sell these:
Mr F.
Could the effect be mitigated by jamming some sheet material between the joists? (It would be above the lamps so may be that would be a problem).
If that's possible what would the best material be? Some more plasterboard?
Mr F.
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