A calmer, more comfortable home

High-performance interior window inserts that provide professional-grade quiet and efficiency without changing the windows you love.

Custom-engineered to stay in place year-round, these low-profile panels create a permanent thermal and acoustic barrier for your existing windows.

Before and after showing K Window Insert noise reduction with a train passing by

Professional performance, lasting value

Engineered to outperform standard windows, our systems provide a high-performance choice for your home with measurable results that last for years.

Acoustic Engineering

Custom-fabricated inserts create an additional acoustic barrier, reducing external noise transmission by 50-70% through precision sealing and specialized materials.

Thermal Performance

Engineered air barrier system eliminates drafts and improves thermal efficiency by up to 20%, reducing heating and cooling costs through precision-fit installation.

Perfect Fit

Designed to be hardly noticeable once installed, our inserts maintain the visual normalcy of your home while quietly performing in the background.

Engineered for the long term

Whether you're looking for a permanent thermal upgrade or complete acoustic isolation, we provide a practical, professional solution that stays in place year-round.

  • No permanent changes or drilling into your existing windows
  • Fully removable if you decide to replace windows later
  • Locally fabricated for a precise, professional fit
01

Consult

On-site technical assessment

02

Measure

1/16" precision measurement

03

Fabricate

Local custom craftsmanship

04

Install

Professional clean-fit

Frequently Asked Questions

Common questions about window inserts and our installation process.

Is this meant as a long-term solution?

Yes. Our inserts are engineered for durability and year-round performance. They provide the thermal and acoustic benefits of high-end windows and are designed to stay in place as a permanent upgrade to your home's efficiency.

Will they be visible day-to-day?

Once installed, our inserts are designed to be hardly noticeable. They maintain the visual normalcy of your home and disappear into the existing window frame, providing a clean, professional finish.

How do they compare to window replacement?

In many cases, our inserts provide superior noise reduction and thermal performance compared to new standard windows. They offer a high-performance alternative that is more cost-effective and far less disruptive than a full renovation.

How much do window inserts cost?

Costs vary based on window size and quantity, but typically range from $200-500 per window. We provide a professional assessment and quote after measuring your specific windows.

Still have questions? We're here to help.

See If This Makes Sense For Your Home

A high-performance path to a more livable home.

Ready for a professional upgrade? We'll help you determine if custom inserts are the right long-term solution for your home.

Request a Professional Assessment