Soundproofing windows depends on how sound is coming into your home and what noise is disturbing you. Soundproof windows work against traffic noise, barking dogs, & noisy neighbors – and they do this with window insulation. Soundproofing window inserts provide inside window insulation that both reduces and absorbs sound. Find out if they’ll work for you:

simple soundproofing windows tricks by blocking noise from entering

Types of Window Soundproofing

Sound Reduction — Stops noise from entering through windows into your home in the first place.

Sound Absorption — Stops the noise that does get in from reverberating around the house.

First, decide if you need soundproofing or absorbing products. Noise travels via vibrations carried by the air. Air sealing and insulation help block noise from entering your home. Noise generated outside, in a separate space from you, calls for soundproofing products. They stop noise from traveling through windows, ceilings, doors, and walls. Noise generated inside your home requires sound absorption products, which reduce echo.

Sometimes both are required: sound reduction to block as much outside noise as possible and sound absorption to minimize reverberation of the sound that does penetrate. For example, how to soundproof a window from traffic noise: 1. soundproof your windows to stop the sound of cars from coming through the window; 2. add sound absorbing items to stop echos of noise that does get in.

diagram of a soundproof window with original glass and acrylic acoustic insert

How to Soundproof a Window with Inserts

Installing window inserts is an easy and effective way of soundproofing windows. Indow Acoustic Grade window inserts can reduce and cancel noise – up to 70% of outside noise when placed over single-pane windows and up to 50% of noise coming through double-pane windows. In an office or home, soundproofing windows is easy with our inserts that press into your existing window frame—no hassle, nails, or adhesives required. But how much does it cost to soundproof windows?

woman installing indow insert for simple soundproofing in windows

Indow inserts are edged with silicone compression tubing to create a seal for your soundproof window. Getting an exact fit is essential in soundproofing a window, since gaps and spaces allow sound to seep inside. This precise fit also creates a more comfortable, energy efficient space while the low profile practically disappears into your window frame. Our custom-made inserts offer simple soundproofing for any window shape.

Watch this 2 minute demo by window expert, The Craftsman Blog:


*We want to ensure our inserts help solve your noise problem. Overall noise reduction depends on the amount of noise coming through your walls, ceilings, floors, doors, and existing windows. Noise reduction will be less when placed over double-pane windows. Read our full Noise Reduction Sheet to learn more.


Noise Cancelling Window Treatments

Noise reducing products like sound damping curtains can also help with outside noise pollution. They contain materials inside the lining, such as mass-loaded vinyl, that have soundproofing qualities. This is a quick and simple soundproofing solution, but be aware, sound dampening curtains can be heavy and require special mounting hardware. Heavy drapes can also do the trick, but aren’t as effective at creating a soundproof window as sound dampening curtain or window inserts.


Sound Absorbing Treatments

Despite your best room soundproofing efforts, the sound that does penetrate can be absorbed once it’s in the room to minimize reverberation. It’s best to avoid minimalist style of exposed brick and wood floors. Consider hanging Acoustic panels. Also, plush rugs with sound dampening rug pads, wall hangings, upholstered furniture and plants will help absorb sound.


Indow Inserts Are Featured In:

logos of newspapers and magazines that have featured Indow window inserts

“Once you pop them in (no hardware required), you don’t even notice them. It’s the kind of ridiculously simple invention that you think must have been invented before.” -Popular Mechanics, These Ingenious Window Inserts Will Slash Your Heating Bill


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