Acoustic insulation for loft

When it comes to soundproofing, the first step is always to identify how the sound is actually travelling, not just where you think it’s coming from. In many cases like yours, it’s not just the floor; sound can travel through walls, ceilings, and even small gaps in the structure. A simple way to check this is the following: When the noise is at its peak, place one ear against different surfaces (walls, ceilings, corners) and listen carefully. This can help you pinpoint the main paths the sound is taking. You might find it’s travelling through flanking paths (side walls, junctions), not just directly through the floor. If you can clearly hear conversations, that usually means there are weak points or gaps in the construction Before adding insulation, I’d focus on: Sealing all gaps, cracks, and penetrations (acoustic sealant is key here) Addressing weak areas where sound can leak through In terms of improving sound reduction: Use high-density mineral wool within joists (this helps absorb sound but won’t stop it on its own) For impact noise (footsteps), you need decoupling, such as a floating floor system (e.g. rubber layer + dense materials like mass-loaded vinyl, soundtech, etc.) Regarding your loft idea, I'd start with a simple ear check (listed above); most likely, you won't have to do anything there once you address flanking paths. In most cases like this, the best results come from: Treating the floor/ceiling between you and the neighbour And very importantly, addressing flanking paths through walls! Soundproofing is always a system, not just one material - that’s where most advice goes wrong. Think of sound as energy that travels through different materials/structures.

Ye you need to sound proof the floor so it stops the noise from below. You can also get acoustic underlay if you have carpet down