Soundproofing: A 2025 Guide to Best Window Styles

Jenny Kakoudakis
Jul 10
4 min read

Updated: Jul 15

When browsing for new windows, most people think first about boosting energy efficiency. But what about the outdoor noise? If you live in traffic-busy areas or have especially loud neighbours, soundproofing can make a world of difference.

In this practical guide, we’ll talk about the best windows for soundproofing and discuss a few budget-friendly, DIY solutions.

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Noise-Reduction Windows: How Do They Work?

Noise slips into your home through air and solid materials. Two measurements show how well a window blocks it:

STC (Sound Transmission Class): measures indoor-type sounds, like voices or music. It’s the most common standard for windows and walls, with standard dual-pane windows scoring around STC 26. Acoustic windows (or triple-pane ones) offer an STC 45, while soundproof windows promise a whopping STC 55. The higher the rating, the better.

OITC (Outdoor-Indoor Transmission Class): measures lower-frequency outdoor noise, like aeroplanes or trains. It’s a less common measurement, but important if you live near persistent low-frequency noise, like a train line.

Noise reduction slows down and disrupts the sound waves. Extra panes, thicker or laminated glass, optimised air spaces — all work to absorb or reflect vibrations.

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Glass Technologies to Block the Noise

According to Natural Resources Canada, windows account for up to 35% of a home’s total heat loss and a large chunk of noise leaks. The chosen glass type plays a crucial role in reducing outside noise.

1. Double- or Triple-Pane Glass

Here’s how insulated windows work: between two or three layers of glass, there are layers of air or insulating gas. These airspaces are buffers that break up sound waves and reduce the number of decibels you hear.

Triple-pane windows are a better yet pricier choice, sometimes boosting noise reduction up to 7 STC points. The downside? The prices are biting, and you may require a full window and frame replacement.

Price range: around $400-$800 for standard double-pane (vinyl) and around $700-$900 for triple-pane.

2. Laminated Glass

Laminated glass consists of two layers of glass and a tough plastic (PVB) interlayer. Its noise-reducing qualities are legendary, promising to block up to 95% of external noise. It also holds together when broken. The extra level of security helps resist forced entry and reduces shards if broken.

Price range: laminated double-pane window can cost around $800, while laminated triple-pane — over $1,000.

3. Dissimilar Glass Panes

Combining two glass panes of different thickness can boost soundproofing effectiveness. A thicker pane blocks deeper rumbles, while thinner panes are designed to handle high-pitched noise. Unlike three-pane options, dissimilar glass panes will cost you less.

Price range: around $500–$1,500.

Combining different types of glass, such as laminated double-pane, will bring soundproofing to the next level. On top of that, window upgrades can save up to 12% on energy bills, CMHC’s Renovation for Energy Savings stats show.

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Best Window Styles to Keep the Noise Out

When it comes to shutting down the outside racket, not all window styles are created equal. Here’s a look at the best windows for soundproofing that excel in reducing noise transmission.

1. Casement Windows

Casement windows have hinges at the sides, so they swing outward just like a regular door. When closed, the sash (the moving glass part) presses tightly against the window frame, creating a tight compression seal. That’s why casement windows have pretty low air leakage rates and decent noise reduction levels.

2. Awning Windows

Similar to a casement but hinged at the top and opening outward. They close with an airtight compression seal, allowing for lower leakage rates and better soundproofing qualities. Awning windows have an additional superpower: when it rains, they still let you ventilate the house. A perfect choice for basements and ground-floor spaces.

3. Fixed Windows

These panes don’t open at all. That is a disadvantage if you need window ventilation and egress. But if that’s not a requirement, fixed windows offer one of the best noise ratings of any style. No gaps, sliders, or hinges to let the noise in.

Quick Comparison Table

DIY Options

Before investing in expensive, soundproof windows, consider trying out a few budget-friendly solutions. Don’t worry — you don’t have to be a DIY superstar. All you need are some basic tools and hands that aren’t all thumbs.

Caulking. Old, cracked, or missing caulking leaks noise. Resealing boosts noise reduction by blocking the air gaps around the windows.
Quality Weatherstripping. Buy and install good self-adhesive weatherstripping (like EPDM or silicone foam) to boost weather resistance and soundproofing.
Sound-Resisting Window Blanket. Invest in heavy moving blankets to block sound temporarily. It’s a cheap, quick, and effective solution that won’t block 100% of noise but will decrease it significantly.
Soundproofing Film. Noise-dampening film with a lamination core is another great idea. Just buy pre-cut sheets or a roll (it typically has a peel-and-stick backing) and apply like a window tint.
Window Inserts. A window insert is yet another window covering. Made from noise-reduction material and foam, it’s an effective and quick solution to the noise problem. Just set in place when outside noise becomes too much.

You can also hire pros to retrofit laminated glass — you keep your existing frame and replace only the glass unit. Laminated insulated glass adds an extra layer of noise protection. Still, consider it your last resort, because it’s not cheap and needs better-than-average DIY skills.

And remember: regular maintenance can boost your window’s lifespan up to 15 years, as the CMHC Capital Replacement Planning Manual indicates.

Final Thoughts

From window styles to glass technologies, there are a lot of factors to consider when choosing a soundproof window. Casement, awning, and fixed windows offer more advanced noise reduction thanks to airtight seals.

And if paired with triple-glazed and laminated glass? Your house will transform into a calm, relaxed retreat from the outside racket and noisy neighbours.

Our writers like to find the latest trends for fashion and interiors. We launched the award-winning Seasons in Colour in 2015 and the luxury property and interior decor blog www.alltheprettyhomes.com in 2024 to cover all your interior design, travel and lifestyle inspiration needs.