First, an honest sentence that most articles on this topic avoid: you cannot soundproof a rented Lagos room on a budget.
Real soundproofing means mass and sealed gaps — dense material in the wall cavity, solid-core doors, no air path. That is construction, it needs the landlord's consent, and it costs more than your furniture.
What you can do is meaningfully reduce noise. Those are different goals, and knowing which one you are pursuing saves you from buying things that do nothing.
The thing that does nothing
Foam panels. The egg-crate acoustic foam sold everywhere for this purpose is designed to reduce echo inside a room, for recording. It does almost nothing to stop sound passing through a wall.
People spend real money on foam and are baffled when they can still hear everything. Skip it unless you are recording audio.
Where the noise is actually getting in
Sound follows air. So before you treat a wall, find the gap.
- The gap under the door. In most rooms this is the single largest path, and the cheapest to fix. A draught excluder, a rolled towel, or a fitted door sweep will make an audible difference for very little money.
- The door itself. Most interior doors here are hollow and light. You cannot easily replace one in a rental, but a heavy curtain hung across it adds real mass.
- Vents and louvres. Common in Nigerian construction and a direct air path. You can partially block them — but do not fully seal ventilation in a room where anyone sleeps, especially with a generator running.
- Windows. Single glazing and louvre windows leak sound badly. Heavy lined curtains help.
- The gap above a partition. If your room was divided, the open top is the whole problem.
What actually works on a budget
- Seal the door gap. Cheapest intervention, biggest single gain.
- Heavy curtains, floor to ceiling, wider than the window. Mass and softness. They also cut heat and fading.
- A bookshelf on the shared wall. Full of books, ideally. Genuinely effective mass, and it is furniture you needed anyway. Best value item in this article.
- Rugs and soft floor covering, especially on tiles and especially upstairs. Footsteps and dragged chairs are structure-borne noise and fabric absorbs them.
- Move the bed off the shared wall if the layout allows. Free.
- A wardrobe against the shared wall — same principle as the bookshelf, and it doubles as your storage.
- White noise. A fan, an air conditioner or an app. Masking noise is not reducing it, but for sleeping it works better than most physical fixes at this budget.
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The generator, which no curtain will fix
Worth its own paragraph because it defeats everything above. A generator running a few metres from your window produces low-frequency noise that passes through walls, and low frequencies are exactly what soft furnishings do not absorb.
Your realistic options are placement and timing rather than materials: where the unit sits, whether it can be moved further from bedroom windows, whether a simple enclosure is possible with the landlord's agreement, and above all what hours it runs. Agree the hours with your household and, if it is a compound unit, raise it with the caretaker.
Check this at the viewing rather than after moving in. Ask where the generator is, and go and stand next to it.
Before you fix anything to the structure
Section 7(5) of the Tenancy Law of Lagos State 2011: a tenant shall not make alterations or additions without the landlord's written consent. Panels screwed to walls, a replacement door, a fitted enclosure — all alterations.
Get consent in writing first. Under section 6(2), improvements made with the landlord's previous written consent can be claimed as compensation when you leave; without it you may simply be told to remove them at your own cost.
On a one-year tenancy, prefer curtains, furniture, rugs and door sweeps — everything that moves out with you.
The cheapest soundproofing is an agreement
Most flatmate noise is not a construction problem. It is a schedule problem.
Agree quiet hours on weeknights, both directions. Agree headphones after them for music, films and calls. Agree default call locations so two people are not talking in the same room. Agree that anyone can say "can you bring that down" without it being an accusation — that last one matters more than any of the physical fixes.
If noise is your main worry, screen for it before you move in: ask what time they sleep, whether they take calls at home, and what a normal evening sounds like. Find someone whose hours fit yours on roommates.
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