Explore Whisper Windows

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Whisper Window panel installed over an existing NYC apartment window

Soundproof & insulate your windows in 10 days

85% noise reduction and 20% energy savings with custom interior window inserts

No construction
Fully reversible
Custom made in NYC

A quieter & more comfortable home starts at the windows

The mass-air-mass system behind better soundproofing and insulation

Cross-section showing an existing window, a large air gap, and a Whisper Windows insert
01

Quieter rooms & better sleep

Our custom interior inserts help block up to 85% of noise, including traffic, sirens, above-ground trains, construction, and other heavy city sounds.

02

Warmer winters & cooler summers

Our inserts combine insulating materials with a tight custom seal to block drafts, reduce heat loss, and improve year-round comfort, with average energy savings of ~20%.

03

Cleaner indoor air

Helps block dust, pollen, smoke, and outdoor odors from entering your home, especially for allergy-sensitive households.

04

Block UV and protect your home

Add a shatter-resistant interior layer that helps protect historic windows while blocking UV rays that can fade furniture, floors, and artwork.

Custom configurations for every unique home.

Whisper Windows inserts installed on a floor-to-ceiling corner window
Whisper Windows outside-mounted insert on a double-hung window
Whisper Windows insert installed in a pre-war Soho home
Whisper Windows insert installed on a large picture window
Whisper Windows insert protecting a historic stained glass window

See it in action.

Hear the Difference

Unedited Before-After Demos showing how our inserts reduce real NYC noise.

Demo video

Above Ground Train in BK

Above Ground Train in BK: Unedited before-after demo from a real NYC installation.

Unedited before-after demo from a real NYC installation.

Demo video

Sirens in Soho

Sirens in Soho: Unedited before-after demo from a real NYC installation.

Unedited before-after demo from a real NYC installation.

Demo video

Industrial Fan on the UWS

Industrial Fan on the UWS: Unedited before-after demo from a real NYC installation.

Unedited before-after demo from a real NYC installation.

Window Types

Built for real NYC windows.

Different windows need different details, but the idea is the same: we add a custom interior panel without replacing your existing window.

Testimonials

What NYC Customers Say

★★★★★

"The panels pop on and off easily, and my landlord had zero issues. Before installation, nonstop traffic kept me up every night-now I sleep so well. And it was a fraction of the cost compared to other solutions I looked into."

Nicole W.

Manhattan at the Queensboro Bridge on-ramp

★★★★★

"I live on a very noisy intersection and was ready to move. These inserts worked incredibly well-far better than I hoped-and the team tailored everything to my individual needs."

Josh M.

Brooklyn, Highrise Apartment

★★★★★

"We live on a busy street with cheap old windows. The panels have basically blocked the noise completely-and they're nearly invisible once installed. They also went above and beyond in customer support."

Bowen S.

Brooklyn Brownstone

Read more reviews on Google

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Quote & Process

Get a custom recommendation from photos.

Send us photos of your windows and tell us what you're trying to solve. We'll recommend the right panel style, soundproofing level, and installation approach.

1

Send photos

Show us the window, surrounding frame, sill depth, and any AC/PTAC or shades.

2

Get options

We recommend the setup based on your noise, insulation needs, window type, and budget.

3

Measure & fabricate

We custom measure and fabricate panels for your specific openings.

4

Install locally

Our NYC team installs the panels and shows you how to remove or access them.

FAQ

Common questions, answered clearly.

A quick overview of how the panels work, what they replace, and what to expect from the quote process.

Is this window replacement?

No. We keep your existing windows in place and add a custom interior panel inside the room.

Can I still open my windows?

Yes, depending on the setup. Many panels are removable or modular so you can access the window when needed.

Does this require drilling?

We offer no-drill, low-drill, and reversible installation options depending on the window type, wall/frame condition, and access needs. Some setups may use small reversible fasteners.

Is this renter or co-op friendly?

Our systems are designed for NYC apartments, including rentals, co-ops, and condos. We can recommend removable or reversible options when needed.

How much noise reduction should I expect?

Results depend on your existing window, wall construction, air gap, panel thickness, and noise type. Street noise, voices, and traffic are often more predictable; trains, horns, sirens, construction, and vibration may require stronger configurations or treatment of other weak points.

Does it help with cold and drafts?

Yes. The added interior layer and air gap can help reduce drafts, cold window zones, and heat loss.

Does it work with window ACs or PTACs?

Often, yes, but ACs and PTACs can be major weak points. We may recommend a combined approach for the window and AC/PTAC area.

How do I get a quote?

Send photos of your windows, rough measurements if available, and a short description of the problem you're trying to solve.

Start with photos.

Ready to make your windows quieter and more comfortable?

Send us photos and we'll recommend the right setup for your windows.