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.

85% noise reduction and 20% energy savings with custom interior window inserts
The mass-air-mass system behind better soundproofing and insulation
Our custom interior inserts help block up to 85% of noise, including traffic, sirens, above-ground trains, construction, and other heavy city sounds.
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%.
Helps block dust, pollen, smoke, and outdoor odors from entering your home, especially for allergy-sensitive households.
Add a shatter-resistant interior layer that helps protect historic windows while blocking UV rays that can fade furniture, floors, and artwork.










See it in action.
Unedited Before-After Demos showing how our inserts reduce real NYC noise.
Window Types
Different windows need different details, but the idea is the same: we add a custom interior panel without replacing your existing window.
Project photo coming soon
For double-hung, casement, and common rental or co-op windows.
See apartment window optionsProject photo coming soon
For modern condos and curtain wall buildings where replacement is usually impractical.
See floor-to-ceiling optionsProject photo coming soon
For original windows you want to preserve, protect, and insulate without changing the exterior.
See historic window optionsProject photo coming soon
For rooms where sound, drafts, or heat may leak through both the window and the AC/PTAC area.
See AC/PTAC optionsProject photo coming soon
For arches, angles, transoms, and unusual openings that standard systems may not handle cleanly.
See specialty window optionsProject photo coming soon
For wide window walls that need modular removable panels for practical access.
See large window options(Link opens in new tab)
Quote & Process
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.
Show us the window, surrounding frame, sill depth, and any AC/PTAC or shades.
We recommend the setup based on your noise, insulation needs, window type, and budget.
We custom measure and fabricate panels for your specific openings.
Our NYC team installs the panels and shows you how to remove or access them.
FAQ
A quick overview of how the panels work, what they replace, and what to expect from the quote process.
No. We keep your existing windows in place and add a custom interior panel inside the room.
Yes, depending on the setup. Many panels are removable or modular so you can access the window when needed.
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.
Our systems are designed for NYC apartments, including rentals, co-ops, and condos. We can recommend removable or reversible options when needed.
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.
Yes. The added interior layer and air gap can help reduce drafts, cold window zones, and heat loss.
Often, yes, but ACs and PTACs can be major weak points. We may recommend a combined approach for the window and AC/PTAC area.
Send photos of your windows, rough measurements if available, and a short description of the problem you're trying to solve.
Start with photos.
Send us photos and we'll recommend the right setup for your windows.