Noise from a neighbour is one of the few household problems where most of the money spent on it is wasted, because the products sold to fix it address a different problem from the one people usually have.

Knowing which kind of noise you have decides whether anything is worth buying at all.

The two kinds, and why it matters

Airborne noise travels through the air and then through the structure: voices, television, music. It is reduced by mass — heavy, dense, sealed barriers.

Impact noise is created in the structure itself: footsteps, doors slamming, furniture dragging, a washing machine on a spin cycle. It travels through the building as vibration and comes out of walls far from the source.

This is the crucial distinction. Mass does very little for impact noise. A neighbour’s footsteps overhead are not passing through the air in your ceiling; they are the ceiling moving. Adding soundproofing panels to that ceiling achieves close to nothing, which is why people who buy them are so often disappointed.

What does not work

Acoustic foam. Sold constantly for this and designed for something else entirely — it absorbs reflections inside a room, improving how a room sounds for recording. It does almost nothing to stop sound entering from outside.

Thin panels stuck to a wall. Without meaningful mass and an air gap, the reduction is negligible.

Filling a room with soft furnishings. Improves the acoustics within your room, which can make the space feel calmer, but does not reduce what arrives.

What genuinely helps

Sealing gaps, which is the highest-value cheap intervention. Sound behaves like water: a small gap undermines a large barrier. Gaps under doors, around badly fitted skirting, at service penetrations, and around old windows all leak sound. Draught-proofing strip and acoustic sealant are inexpensive and help both noise and heat — see where heat escapes.

Heavy curtains over a single-glazed window facing a road. Not soundproofing, but a genuine reduction for a modest cost.

A dense bookcase against the shared wall, full of books, ideally not touching the wall. Mass plus a break in the path. Unfashionable and more effective than anything sold as a soundproofing product at the same price.

Rugs and underlay, if you are the upstairs neighbour. Many leasehold agreements actually require floor coverings for this reason, and the HSE’s guidance on noise is aimed at workplaces but explains the underlying physics clearly enough to be useful at home. This is the one intervention that reliably reduces impact noise, and it works at the source rather than at the receiver.

Proper construction work — an independent stud wall with an air gap and dense insulation, or a resiliently mounted ceiling. This works, and it is building work with cost, disruption and lost floor space. It is the honest answer for a serious problem, and it needs the property owner’s agreement.

Masking, which is undersold

When reduction is not possible, making the noise less noticeable is a legitimate answer rather than a defeat.

Steady broadband sound — a fan, an air purifier, a white noise machine — raises the floor so that intermittent noises do not stand out against silence. It is not a trick; the distress from neighbour noise comes largely from unpredictability, and a constant background genuinely reduces it.

Earplugs for sleeping are the cheapest thing on this page and the one people resist longest.

Find where it is actually getting in

Before spending anything, spend ten minutes locating the path. People routinely treat the wall the noise seems to come from, when it is arriving somewhere else entirely.

Sound follows the easiest route, and in flats that is frequently not the obvious one: a shared ventilation duct, the gap where a soil pipe passes through a floor, a chimney breast connecting two properties, or a poorly sealed socket box directly back-to-back with the neighbour’s.

Put your ear near each of those in turn while the noise is happening. A socket or a vent that is noticeably louder than the surrounding wall tells you where to spend, and sealing that one point can do more than treating an entire wall.

This is also why the problem so often does not match the layout — impact noise entering through a structure can emerge several rooms from its source.

When it is a complaint rather than a project

Some noise is not a soundproofing problem. Persistent noise at unreasonable hours may be a statutory nuisance, and there is a process for it.

Keep a log — dates, times, duration, what the noise was. That record is what any authority or landlord will ask for, and reconstructing it afterwards is much weaker than keeping it as you go.

In the UK, reporting a noise nuisance goes through the local council, which has statutory duties to investigate. Speaking to the neighbour first is usually recommended, and is often effective — people are frequently unaware of what carries.

The order to try

Keep a log if it is persistent. Seal the gaps. Curtains, bookcases, rugs. Mask what is left. Only then consider building work, and raise it formally if it is unreasonable rather than merely audible.

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