We decided to soundproof with an independent ceiling and thick layers of soundblocker under our existing ceiling. We live in a flat. The upstairs flat has laminated floors which cause noise to travel to us. Noise does not stop all day and continues till 3 am and beyond all night. We spoke with the landlady and tenants but no luck. So we had a company here who advised us to do the independent underceiling insulation. They said that some offending walls have to be soundproofed as well to stop noise travelling from joists down to us. So, does any one have this expeirience? Any company recommendations?