How to Soundproof a Bedroom Wall Cheaply (UK)

You can hear the neighbours’ television word for word. Or their alarm at 6am. Or — the classic — their toddler practising what sounds like competitive screaming. Thin bedroom walls are a special misery because they invade the one room where quiet matters most. And the internet is full of confident nonsense about fixing it: egg boxes, foam tiles, ‘soundproof paint’.

Here’s how to soundproof a bedroom wall cheaply, honestly: what actually reduces noise (it’s physics, not magic), what each method costs, and which popular ‘solutions’ are a waste of money.

The physics in 60 seconds (so you don’t waste money)

Sound travels through walls in two ways: airborne (voices, TV, music — carried by air vibrating the wall) and impact (footsteps, banging — vibration through the structure). Cheap bedroom fixes mostly address airborne sound. And the governing principle is mass: heavy, dense, airtight barriers block sound; light, porous things don’t. That’s it. That’s the whole science.

This is why acoustic foam tiles — the wedge-shaped stuff YouTubers stick on walls — do almost nothing for soundproofing. They’re designed to reduce echo inside a room (for recording), not to stop sound passing through a wall. Egg boxes are even worse: a fire hazard that does nothing. If a product is light and cheap and promises miracles, physics says no.

Airborne sound (voices, TV) is what cheap fixes can help with.
Mass + airtightness block sound. Light foam doesn’t. Egg boxes are a fire hazard.
If it sounds too good to be true, check the physics before the reviews.

Step 1: seal the gaps (free to £30)

Before spending anything on materials, hunt down air gaps — because where air goes, sound goes. Check: gaps around skirting boards, cracks where the wall meets the ceiling, holes where pipes and cables pass through, ill-fitting doors, and keyholes (a surprising amount of sound comes through a keyhole). Seal them with acoustic sealant (£8 a tube), expanding foam for larger gaps, and draught excluder around the door.

Doors are the weak link in most bedrooms: a hollow internal door with a 10mm gap underneath might as well not be there acoustically. A £15 brush door seal on the bottom and compression seals around the frame can make more difference than anything you do to the wall. Seal first, spend second — this step alone often halves the perceived noise.

Seal skirting gaps, pipe holes, cracks and keyholes with acoustic sealant.
Fit brush and compression seals to the door — often the biggest single win.
Where air goes, sound goes: airtight is the cheapest upgrade.

How to soundproof a bedroom wall cheaply: add mass

The cheapest effective wall treatment is a layer of dense material fixed directly to the wall: acoustic plasterboard (£15–25 per 2.4×1.2m board) or mass-loaded vinyl (MLV, £40–60 for 5m²). A single extra layer of 15mm acoustic plasterboard, properly sealed at the edges, typically reduces airborne noise by 5–10dB — noticeable, not miraculous, but real. Two layers with overlapping joints does better.

The budget method: fix resilient bars (£3–5 each) horizontally across the wall, then screw acoustic plasterboard to the bars. The bars decouple the new layer from the wall, which adds meaningful performance for little extra cost — this is the cheapest way to get genuinely good results, around £150–250 for a typical bedroom wall including plastering. Seal the perimeter with acoustic sealant; an unsealed edge leaks sound like an unsealed window leaks heat.

One layer of acoustic plasterboard: £15–25/board, 5–10dB reduction.
Best budget method: resilient bars + acoustic plasterboard, £150–250/wall.
Seal all edges with acoustic sealant — gaps undo the whole job.

Furniture, textiles and realistic expectations

Here’s the honest truth about soft furnishings: a full bookcase against the noisy wall helps (books are dense — mass again), heavy curtains help a little with high frequencies, and a wardrobe full of clothes against the wall is free mass. These are genuine improvements, just modest ones — maybe 2–3dB. Worth doing because they’re free, not because they’ll transform anything.

Set expectations by noise type. Muffled voices and TV: very fixable with the methods above. Bass from music, slamming doors, footsteps from above: much harder — low frequencies need serious mass and decoupling, which is beyond cheap fixes. If the problem is impact noise from neighbours above, the ceiling needs treatment, not the wall. And if you share the wall with a Victorian terrace neighbour, our guide to buying a Victorian terrace explains what to check before you buy — wall thickness included.

Bookcases and wardrobes against the wall: free, modest, worth doing.
Voices and TV: fixable. Bass and impact noise: needs serious work.
Squeaky floors adding to the misery? Fix them without lifting boards.

What not to buy

The soundproofing market has more snake oil than most. Skip: acoustic foam panels (for echo, not insulation), ‘soundproof’ wallpaper and paint (adds negligible mass — the claims rely on creative testing), egg boxes (fire hazard, useless), and MLV sold at luxury prices (it’s a commodity — compare per m²). Also skip anything that promises ‘100% soundproofing’ — true soundproofing requires room-within-a-room construction costing thousands.

The legitimate cheap stack, in order: seal gaps (£30), door seals (£25), heavy furniture against the wall (free), one layer of acoustic plasterboard on resilient bars (£150–250). Total: under £300 for a genuinely quieter bedroom. That’s the honest answer — not silence, but the difference between hearing every word and hearing a murmur. For most people, that’s enough to sleep.

Skip: foam panels, ‘soundproof’ paint, egg boxes, miracle claims.
Legit cheap stack: seal → door seals → mass on the wall. Under £300 total.
Expect ‘much quieter’, not ‘silent’ — and that’s usually enough.

Cheap bedroom soundproofing isn’t about magic products — it’s about physics on a budget: seal the air gaps, fix the door, add mass to the wall. Under £300 and a weekend gets you from ‘I can hear their conversations’ to ‘faint murmur’, which is the difference between insomnia and sleep. Save the egg boxes for actual eggs. A final reality check before you spend: identify exactly what you are hearing and set expectations accordingly. Muffled voices and television through a party wall respond well to the methods above. Bass-heavy music, slamming doors or footsteps from above need serious mass and decoupling — potentially a professional job costing thousands. There is no shame in deciding the cheap fixes are enough: going from every word audible to a faint murmur transforms sleep, and that is what the bedroom is for. Perfect silence belongs in a recording studio; good enough sleep is a weekend project costing a few hundred pounds. Which? covers noise-reduction products with healthy scepticism about miracle claims.