Hi,
I live in an ex-local authority semi-detached house with a solid 9 inch wall separating the two houses. When renovating my property I dry lined the dividing wall in the living room leaving a 25mm air gap between the wall and a single layer of 12.5 mm plasterboard.
We have new neighbours who like to listen to their TV quite loud(!) so I have been looking at improving the sound insulation. I had assumed that filling the 25mm air gap would improve the sound insulation, as a trial I filled the gap with vermiculite but this seems to have increased the amount of sound being transmitted through the wall, does this make sense to anyone? I had assumed that filling the air gap with a reasonably sound absorbent material would help, am I wrong? The plasterboard is fixed to the dividng wall using 38mmx25mm battens at 400mm centres.
Thanks in advance
I live in an ex-local authority semi-detached house with a solid 9 inch wall separating the two houses. When renovating my property I dry lined the dividing wall in the living room leaving a 25mm air gap between the wall and a single layer of 12.5 mm plasterboard.
We have new neighbours who like to listen to their TV quite loud(!) so I have been looking at improving the sound insulation. I had assumed that filling the 25mm air gap would improve the sound insulation, as a trial I filled the gap with vermiculite but this seems to have increased the amount of sound being transmitted through the wall, does this make sense to anyone? I had assumed that filling the air gap with a reasonably sound absorbent material would help, am I wrong? The plasterboard is fixed to the dividng wall using 38mmx25mm battens at 400mm centres.
Thanks in advance