What type of internal wall give the best sound insulation?

[edwardo]

in our new extension, a downstairs loo is going to overlap (slightly) one corner of a downstairs reception room. What type of wall would provide the best kind of sound insulation? Breeze? Stud wall with specialty insulation?

Thanks,
Edward

 

[^woody^]

Either

 

[noseall]

The denser the material the better the sound resistance.

A heavy dense block would afford you the greatest resistance.