The smarter alternative to replacement windows. Winsulator interior window insulation panels use a magnetic anchor system to add an extra insulating layer, delivering up to 40% energy savings, up to 70% noise reduction, and full preservation of your home’s original windows. The smarter alternative to replacement windows. Winsulator interior panels use a magnetic anchor system to add an extra insulating layer, delivering up to 40% energy savings, up to 70% noise reduction, and full preservation of your home’s original windows.
Solving window problems around the world for over 40 years! Winsulator helps fix drafty, noisy, or uncomfortable windows without replacing them. Our acrylic window panel attaches with a magnetic anchor system that snaps into place and keeps your windows looking the same. It adds an extra layer that helps hold in the heat, block out noise, and stop air from leaking through. If your windows let in too much heat, cold, or sound, we’re here to help make your home or workspace more comfortable.
Winsulator panels improve efficiency without the cost of replacements. Our patented system delivers 8X the insulating power of a single pane.
Winsulator’s sound-control panels block noise before it enters your home. Enjoy quieter rooms with up to 70% reduction through existing windows.
Winsulator preserves beauty and character without window removal. Increase efficiency while keeping the original design fully intact.
From insulation to noise control, we design smart interior window solutions that improve comfort, efficiency, and performance without changing the look of your existing windows.
Improve comfort and reduce energy use without replacing your windows. Winsulator panels add thermal insulation through a patented interior magnetic panel system.
Reduce outside noise and create quieter, more peaceful rooms. Winsulator panels block sound before it enters through your existing window structure.
Preserve the beauty and character of your original windows while improving comfort and efficiency with a seamless interior panel for historic properties.
Explore our collection of real-world projects that demonstrate the performance, reliability, and long-term value of Winsulator interior window systems across homes, businesses, and historic properties.
Winsulator participated in NASA’s Technology Outreach Program, where engineers submitted our interior panel system for testing and analysis.
The Public Works Center in Jacksonville installed 5,500 Winsulator panels across five major projects at and around Naval Air Station Jacksonville.
Embassy House partnered with Winsulator to boost comfort and efficiency throughout the building.
Winsulator delivers measurable improvements that transform comfort and energy performance in any home or commercial space.
The Energy Audit Result Nobody Wants You commissioned the audit because you had to, or because energy costs had gotten high enough that you needed data. The results came back
Living Next to an Industrial Facility Is Not What the Listing Said If you live in La Porte, Deer Park, Pasadena, or any of the communities that ring the Houston
The Problem With Apartment Windows That Nobody Talks About Most multifamily buildings in the Houston area were not built with energy performance in mind. They were built to a code
The Month Your Electric Bill Stops Making Sense Every summer it happens. You get that July or August utility bill and you just stare at it. In Houston and across
The Hum That Moved In With You It started maybe a year ago. Or two. You weren’t sure at first what it was. A low, constant sound. Almost more of
A Line Item That Nobody Looks At Twice I’ve walked through dozens of commercial buildings in the Houston area over the years. Office complexes, condominiums, municipal facilities, warehouses with attached
Electricity prices have increased 1.8% per year in the United States for the past 25 years. Why wait another year to fix your window problems?
Not sure which interior window insulation panels are right for your home or building? Winsulator offers three purpose-built series, each designed for a specific comfort challenge. Explore your options below and find the fit that works for your windows.
The most effective way to insulate windows from the inside is to install interior window insulation panels. Options range from DIY window insulation kits using plastic film and tape to rigid acrylic window insulation panels like Winsulator’s magnetic system. Rigid panels outperform film because they create a larger, more stable air gap and last for many years without replacement.
Window insulation film and plastic sheeting do reduce some heat loss, but they are fragile, temporary, and far less effective than rigid interior storm window panels. Winsulator’s acrylic panels have been independently tested and shown to reduce energy usage by 29% and interior condensation by 91% — results that plastic film simply cannot match.
Window draft stoppers, weather stripping, and indoor window insulation panels are all options. For lasting results, interior window insulation panels made from acrylic or vinyl provide the highest R-value improvement and the best air infiltration control. Winsulator panels seal the entire window opening, stopping drafts at the source rather than just slowing them down.
Installing interior window panels for winter is the fastest way to improve comfort without replacing your windows. Winsulator’s magnetic panels snap into place in minutes, adding a thermal buffer that keeps warm air in and cold air out. Combined with the existing window, the system performs like a double-pane or even triple-pane unit — at a fraction of the cost of full window replacement.
As a participant in the (TOP) Technology Outreach Program, NASA got their engineers involved to see how well Winsulator held up to scientific testing. They submitted the Winsulator System for testing and analysis to the world-renowned Oakridge National Laboratories. The results were beyond impressive!
Energy usage reduced by 29%
Noise reduced by 60%
Dust and pollen infiltration reduced by 78%
Interior condensation reduced by 91%
The Public Works Center in Jacksonville installed 5,500 Winsulators covering a total of nearly 53,000 square feet in five projects in and around the Naval Air Station Jacksonville, with official results coming from the energy manager of the Navy. Funded under a Basic Ordering Agreement (BOA) at a total cost of nearly $1.25 million, these projects are saving more than $220,000 a year and greatly improving the comfort levels within the buildings where they were installed.
The Winsulator, an internal storm window system, is a simple, but innovative technology, promoted and funded by the State of Florida Energy Conservation Assistance Program.
Winsulator performance at a glance:
42% increase in window performance
50% street noise infiltration reduction
30-degree thermal load rejection
100% Happy Customers!