Whether it’s blaring car horns, construction noise, or late-night chatter, noise has a way of sneaking in—and windows are a weak point. From DIY window inserts to a full window replacement, here’s everything you need to know to soundproof a window.
| Soundproofing Method | Estimated Price | Estimated Noise Reduction |
| Window Inserts | $70 to $150 (DIY) | 40% to 70% |
| Physical Barrier | $40 to $200 (DIY) | 20% to 50% |
| Sealing Gaps | $15 to $45 (DIY) | 15% to 20% |
| New Windows | $500 to $1,500 (pro) | 90% to 95% |
| New Shutters | $150 to $500 (pro) | 40% to 70% |
Use Window Inserts
| Estimated DIY Cost | $70 to $150 |
| Estimated Noise Reduction | 40% to 70% |
Usually made from acrylic or polycarbonate, acoustic window inserts are an easy way to help seal out the chatter of the outside world. “For a robust solution, window inserts can create an additional layer of sound protection,” says Anthony Williams of Pillar Management Group in Miami, FL.
“These fit inside your existing window frame, trapping air between the two layers and dramatically reducing outside noise,” he continues. “Many brands are designed for DIY installation.”
When it comes to efficiency, window inserts punch far above their weight. “Window inserts offer almost the same noise reduction as replacing the window—at a fraction of the cost,” Williams adds. That said, acrylic and polycarbonate sheets sealed with weatherstripping will maximize the efficiency, while vinyl sheets provide more of a quick, temporary fix.
Install a Physical Barrier
| Estimated DIY Cost | $40 to $200 |
| Estimated Noise Reduction | 20% to 50% |
You have two physical barrier options.
Soundproof curtains: These heavy, dense curtains are made with sound-absorbing materials that help dampen noise. Look for curtains with multiple layers or those specifically labeled as “acoustic.”
While they won’t block all noise, thick, soundproof curtains or heavy drapes can dampen mid- to high-frequency sounds,” advises Williams. “They’re especially effective for bedrooms or nurseries, where they also block out light.”
Barrier blankets: You can hang soundproofing blankets over windows to help block out sound. These blankets are often used in recording studios but work equally well in residential spaces.
Blankets may not complement your space as much as curtains, but they block more noise and tend to be cheaper. They’re portable, so you can remove them and attach them as you wish.
Seal Gaps
| Estimated DIY Cost | $15 to $45 |
| Estimated Noise Reduction | 15% to 20% |
Sealing the gaps makes a significant impact for the relatively low price. It works soundproofing wonders in combination with other methods, creating an airtight barrier between you and the soundstorm outside.
“Start by applying weatherstripping around the window sash and using acoustic caulk to fill small gaps,” says Williams. “This affordable fix works wonders on older windows where seals have worn down over time.”
Look for high-density foam or rubber weather stripping for the best results. You can also use silicone caulk instead of acoustic caulk.
Install Soundproof Windows
| Estimated Pro Cost | $500 to $1,500 |
| Estimated Noise Reduction | 90% to 95% |
For maximum effect, Williams recommends a full window replacement. “If you’re renovating, consider upgrading to double- or triple-pane acoustic windows. While this is the most expensive option, it offers the highest level of noise reduction.”
George Longtin of Longtin’s Property Services in Massena, NY, recommends triple-pane Low-E Argon windows.
Soundproof windows often feature laminated glass, which is thicker and more effective at blocking sound. Some also include insulating gas layers between panes for added noise reduction.
Install Soundproof Shutters
| Estimated Pro Cost | $150 to $500 |
| Estimated Noise Reduction | 40% to 70% |
If replacing your windows isn’t feasible, consider soundproof shutters on the inside or outside of your windows. They’re a stronger alternative while usually costing less than whole new windows.
We have thick, wooden shutters. Since we got them from the previous tenants, I’m not sure they’re even intended to be soundproof, but I think they make a difference in reducing noise from outside.
Hush Your Home
When bedtime comes, street noise suddenly feels like it’s right in the room with you. You can upgrade your windows on your own, but an expert will take care of the job professionally for maximum noise reduction.
Silence is just a call away. Get in touch with a pro to handle your soundproofing.
Home Gnome delivers the best home service experience at the click of a button. Book reliable, skilled services in seconds and leave the rest to us.
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Main Image: Using spray foam to seal a window frame for soundproofing and insulation. Photo Credit: ungvar / Adobe Stock
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