How to Soundproof a Room Inexpensively (What I Did at Our Summer House)
The summer house is supposed to be the quiet place.
That’s the idea anyway. You leave the city, you leave the noise, you arrive somewhere slower and more peaceful and you decompress for a few weeks before going back. That’s what I told myself every June for several years while sitting inside with the air conditioning on, listening to the girls running through the house, noise coming through the walls from outside, the neighbours two houses down who apparently communicate exclusively at high volume, and the general chaos of a summer house in a place where everyone has their windows and doors open because it’s thirty-eight degrees.
It wasn’t quiet. It was just a different kind of noise from the city.
The air conditioning made it worse in a specific way I hadn’t anticipated. With the doors and windows open at least the noise felt like it belonged to the outside. Once we closed everything up and turned the AC on, the noise that still came through felt more intrusive somehow. Like it had found its way in despite your best efforts and was now trapped in there with you.
I spent one particularly loud August afternoon reading about soundproofing and then the following September, after the season ended and the house was quiet in the way it only is when empty, I did something about it.
This is what I learned and what I actually did.
The honest thing about soundproofing nobody says clearly enough
You cannot make a room completely silent without spending serious money and doing serious structural work. If that’s what you’re looking for, nothing in this article will get you there.
What you can do — inexpensively, without destroying anything, without needing a contractor — is reduce noise significantly. The difference between a room that lets in everything and a room where you’ve addressed the main entry points is real and noticeable. Not silent. Noticeably quieter. In a summer house that’s being invaded by outside noise and running children, noticeably quieter is enough.
Sound gets into a room through gaps first, surfaces second. The gap at the bottom of a door, the space around a window frame that isn’t properly sealed, the thin wall with nothing on it — these are where to start. Not because they’re the most dramatic fixes but because they’re the cheapest and they make the biggest immediate difference.
Start with the doors
The bottom of a door is an enormous gap that most people ignore because it’s not obviously open. Hold a piece of paper at the bottom of a closed interior door and slide it — if it moves freely, that gap is letting sound through freely too.
Door draft stoppers fix this. The kind that attach to the bottom of the door itself rather than sitting on the floor, because the floor ones get kicked out of position constantly, especially in a house with children. Self-adhesive ones take five minutes to install and cost almost nothing. The difference is immediately noticeable when you close the door and the room feels more contained.
The frame matters too. Run your hand around the edges of a closed door and feel for air movement. Anywhere air moves, sound moves. Weatherstripping foam tape around the door frame fills these gaps. It compresses when the door closes and creates a seal. Again, cheap and fast to apply.
Our front door was the worst offender. The gap at the bottom was significant and the frame hadn’t been properly sealed in what looked like years. I did both — door sweep on the bottom, weatherstripping around the frame — and that single door made a difference to the whole entrance area of the house.
The windows
Single-pane windows, which is what most older summer houses have, let sound through very easily. Replacing them with double glazing is the proper solution and also an expensive one that involves a contractor and a budget I didn’t have for that particular September.
What actually helped without replacing anything: heavy curtains. Not decorative ones — proper thick curtains with some weight to them. The kind that block light as well as sound. Hung properly, floor to ceiling, they add a layer of mass between the window and the room that absorbs some of what comes through the glass.
They’re not as good as double glazing. They’re considerably cheaper and they improve the room in other ways too — the darkness, the feeling of enclosure in the evenings. Worth doing regardless of the noise situation.
The other thing that helped was sealing around the window frames with acoustic sealant — the kind that stays flexible rather than going hard and cracking. Any gap between the frame and the wall is a sound leak. You can see them if you look carefully, sometimes feel the air through them on a windy day. Fill them. It takes an hour and the materials are inexpensive.
The walls
Bare walls reflect sound and hard surfaces bounce it around. A room with tile floors, bare walls and minimal furniture is an echo chamber — every noise that gets in bounces around and amplifies.
The cheapest way to address this is mass and soft surfaces. A large bookshelf against a wall adds mass and breaks up sound. It doesn’t need to be a purpose-built soundproofing panel — a full bookshelf is a surprisingly effective sound barrier because the irregular surface of books breaks up sound waves rather than reflecting them uniformly.
Rugs on hard floors help significantly. A thick rug with a proper underlay absorbs footstep noise and reduces the echo effect in the room. In the summer house this was one of the first things I did and the difference in how the room felt acoustically was immediate — the girls running through sounded less like something happening directly above me and more like something happening in the distance, which is the natural order of things.
Acoustic panels — foam panels that absorb sound rather than reflecting it — can be bought inexpensively and mounted on walls. The ones in our bedroom are not beautiful but they’re covered in fabric and at least look intentional. Position them on the wall the noise is coming through primarily, and on the opposite wall where it would otherwise bounce back.
The ceiling
Noise from above — footsteps, children, anything on an upper floor — is the hardest to address without structural work. A drop ceiling with insulation between the layers is the proper solution. Also expensive and disruptive.
What helps without going that far: the same mass principle. Thick rugs on the floor above if that’s possible. Acoustic panels on the ceiling below, which look odd but do reduce echo and some transmission. A ceiling fan running creates enough ambient noise to mask some of what comes through — not soundproofing exactly, more like sound masking, but the effect is real.
The AC unit gap
This was specific to our situation but probably relevant to anyone with a wall-mounted unit. The gap where the unit meets the wall, and the hole where the pipes pass through — these are open channels for sound. We had outside noise coming directly through the pipe gap in a way that was almost worse than through the windows because it was concentrated.
Foam filler in the gaps around the unit housing. Expanding foam sealant around the pipe hole, leaving the pipes free but filling the space around them. This took twenty minutes and made an immediately noticeable difference to the specific quality of noise that had been coming through that wall.
The thing that cost nothing
Background noise.
A fan running in the bedroom, even when the temperature doesn’t require it. Soft music at low volume. White noise through a phone speaker. These don’t reduce the noise coming into the room but they change the signal-to-noise ratio — when there’s something else in the acoustic environment, the intrusive sounds become less intrusive because they’re competing with something rather than arriving into silence.
The girls sleep better with a fan running. I sleep better with a fan running. The noise from outside doesn’t disappear but it stops feeling like an event.
What made the most difference
In order: the door gaps, the window curtains, the rugs, the AC pipe gap. The combination of these things took the summer house from a place where we went inside to escape the noise and found the noise had followed us, to a place where closing the bedroom door actually means something.
Not silence. But enough.
That’s all I have. If you’ve dealt with a similar situation — summer house, apartment, thin walls anywhere — leave what worked in the comments. The specific solutions always depend on the specific house and I’m still looking for better answers on the ceiling problem.
I’m Anastasios Moulios, co-founder of DIY Cozy Living. I enjoy finding creative, practical ways to make small spaces feel warm, stylish, and lived-in. I started this blog with Katerina to share real ideas that make a home feel a little more personal and a lot more comfortable.
