Quick answer: Start with the cheapest, quickest fixes: seal gaps around doors and windows, add thick curtains and rugs, and arrange heavy furniture against shared walls. For a real reduction in noise, soundproofing needs to add mass, decouple surfaces so vibration can’t pass through, and absorb sound within the room. Egg cartons and foam pads, despite the popular myth, do almost nothing to block sound from entering or leaving a room.
Whether it’s traffic noise, a shared wall with noisy neighbours, or your own household activity disturbing others, sound has a habit of finding its way through a home. Nearly 20% of UK homeowners have made a noise complaint to their local council at some point, and with around 23% of homes detached, the majority of us share at least one wall with someone else. The good news is that effective soundproofing doesn’t require a complete renovation, though understanding what actually works matters more than most people realise.
Soundproofing vs Sound Absorption: An Important Distinction
These two things are often confused, but they solve different problems. Sound absorption reduces echo and reverberation within a room, making it feel quieter and less harsh, without necessarily stopping sound getting in or out. Soundproofing is specifically about blocking sound from entering or leaving a space entirely. Soft furnishings like rugs and curtains genuinely help with absorption, but they alone won’t stop noise from next door.
The Four Principles of Soundproofing
- Mass: the more mass a structure has, the harder it is for sound to pass through it.
- Decoupling: separating the two sides of a wall or floor, making it physically harder for vibration to transfer across.
- Absorption: reducing how far sound travels and how much it echoes within a space.
- Damping: materials that convert the vibrational energy of sound waves into heat, reducing resonance.
Effective soundproofing generally combines several of these principles together, rather than relying on just one.
The Egg Carton Myth
One of the most persistent DIY soundproofing myths is sticking egg cartons or foam packaging to walls. Despite how often this comes up online, it does very little to actually block sound, and it isn’t particularly attractive either. If you want genuine sound absorption with a similar budget-friendly spirit, dedicated acoustic foam panels are a considerably more effective, if still modest, alternative.
Budget-Friendly First Steps
Before considering any structural work, these low-cost changes make a genuine, if modest, difference.
- Seal gaps around doors and windows with draught excluders and acoustic sealant. Sound travels easily through even small air gaps, so this is often the cheapest, quickest win available.
- Add thick curtains and rugs. Heavier textiles absorb sound before it reaches the harder surfaces of a room, and different thicknesses give noticeably different levels of absorption.
- Rearrange heavy furniture against the wall or walls where the most noise comes through. Bookcases and large, dense pieces of furniture add mass, and the larger the area they cover, the more noticeable the effect.
- Use soundproof boxes around noisy equipment like router cabinets or pumps, which contains noise at the source rather than letting it spread through the room.
Diagnosing Where Sound Is Getting In
Before investing in any bigger soundproofing project, work out exactly where noise is entering the room, whether through windows, a shared wall, the ceiling above, or the floor below, and where it’s being reflected once inside, since sound bounces off hard surfaces and gets absorbed by soft ones. This diagnosis determines which of the methods below will actually address your specific problem.
Soundproofing a Shared Wall
For a wall shared with a neighbour, the most effective approach is increasing the mass sound has to travel through before it reaches you.
- Build a stud wall in front of the existing shared wall.
- Add acoustic insulation within the new stud wall cavity, which absorbs sound travelling through the original brick or block wall before it reaches your side.
- Finish with plasterboard for a smooth, decoratable surface.
This method is genuinely effective, but be aware it reduces the size of the room, since you’re building an additional wall inward from the existing one.
For the best results, a decoupling system such as a resilient bar or specialist clip system creates an independent wall surface that resists sound vibration transfer far more effectively than a simple stud wall alone, though it adds cost and complexity to the project.
Soundproofing a Floor
Most UK homes use timber joists with floorboards or chipboard directly over them, which is a lightweight construction that transmits both airborne and impact sound easily between floors.
- Add high-density acoustic insulation between the floor joists, which improves sound insulation performance considerably.
- Fit an acoustic underlay beneath your final floor covering, choosing one rated for your specific floor type, whether timber or concrete, and intended finish.
- For impact noise specifically, such as footsteps, a resilient underlay makes a bigger difference than adding mass alone.
Soundproofing a Ceiling
Similar decoupling principles apply to ceilings as to walls, using a resilient clip system to create an independent ceiling layer below the existing structure, which significantly reduces both impact noise from footsteps above and general airborne noise transfer between floors.
How Much Does Soundproofing Cost?
Costs vary enormously depending on the method and scope. Basic soundproofing solutions across walls, floor, and ceiling can cost in the region of £36 per square metre, while premium decoupling systems designed for the best possible sound reduction can run to around £81 per square metre. Budget-friendly options like sealing gaps, adding curtains, and rearranging furniture cost very little by comparison, though they offer more modest results than a full structural approach.
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Frequently Asked Questions
Do egg cartons or foam actually soundproof a room?
No, despite being a widely repeated online tip. Egg cartons do very little to block sound from entering or leaving a room. Dedicated acoustic foam panels offer some genuine sound absorption, but even these don’t provide true soundproofing on their own.
What’s the difference between soundproofing and sound absorption?
Sound absorption reduces echo and reverberation within a room, making it feel less harsh, but doesn’t stop noise passing through walls, floors, or ceilings. Soundproofing specifically blocks sound from entering or leaving a space entirely.
How much does it cost to soundproof a room in the UK?
Basic soundproofing across walls, floor, and ceiling costs around £36 per square metre, rising to roughly £81 per square metre for premium decoupling systems. Budget options like sealing gaps and adding soft furnishings cost considerably less.
Can furniture alone make a real difference to noise levels?
Yes, to a genuine but modest extent. Large, heavy furniture positioned against a noisy wall adds mass, which resists sound transmission. It won’t match a structural solution, but it’s a free or low-cost first step worth trying.
Final Thoughts
Soundproofing works best when you understand the difference between blocking sound and simply absorbing echo, and combine several of the four core principles rather than relying on one quick fix. Start with the cheap, easy wins like sealing gaps and rearranging furniture, and reserve stud walls or decoupling systems for situations where noise is a genuinely persistent problem worth the bigger investment.