Drafty Windows? Lack of Energy Efficiency? Update your windows to
modern standards with this reliable long term solution.
Introducing the Slim Line Insulating Pane | SLIP™
Over 20 years of experience restoring wood windows has made this product come to life. Modernize your single pane Windows and make your home more comfortable, with the SLIP™ (Slim Line Insulating Pane). This update is an innovative and cost-effective way to retain your original, and valuable, wood Windows, while making them more efficient, saving you money, and enhancing the comfort of your living space.
Single Pane to Dual Pane Transformation!
Benefits of the SLIP™

- Increased energy efficiency
- Sound reduction
- Less expensive than a window replacement!
- Maintains original window glass
- Windows can stay historically accurate and functional
- Solid, well-designed construction and material
- Interior or exterior install
- Options of Clear, Obscure, or Low-e
- Tested and proven product (Click to check out Large Projects)
- Extremely low future maintenance cost
We understand windows are an extremely rich aspect of a buildings overall feel and character, and the view to the outside world. Our goal is to improve upon this by updating the windows efficiency while keeping the windows true to the look and feel of the building. Learn how the window upgrade products can increase comfort, save money, and provide a positive return on investment by following the link.
Cost Savings
Energy testing was performed by the Energy Studies in Buildings Lab at the University of Oregon. The SLIPs performance was exceptional when applied to single pane windows and when compared to more expensive alternatives.
Using results on the study, it was concluded that adding SLIP™ to the windows in an average household will result in a cost reduction of 72.9% for the windows.
Average Energy Consumption Associated with Heat Gain/Loss of Windows at a Typical U.S. Household:
- Single pane windows…454 THERMS and 474kWh
- Single pane window with added SLIP™…123 THERMS and 129kWh
- Single pane window with SLIP™ and weatherstripping…93 THERMS and 97kWh
A therm is a unit of measurement of energy (more specifically thermal energy). The therm is used to measure gas consumption as well as consumer cost.
Data yielded by these calculations are built based on assumptions on U.S. household energy use by the U.S. Energy Information Administrations’s Residential Energy Consumption Survey, energy testing done by Energy Studies in Buildings Lab(UO), and windows-associated energy calculations spelled out by the U.S. Department of Energy
COST FOR DIY SLIP™
SLIPs are extremely low-cost and extremely good value. Standard clear tempered SLIPs start at $20/sqft
This square measurement is not the whole window opening but, less actually, rather the square footage of the perimeter of the glass setup.
Click for Online DIY Kit quote form
*Additional costs such as Shipping cost and requested additions such as Doublehung Balances, Low-e glass, and weatherstripping may apply


Check out our video showing off a SLIP™ project
Residential Homes
Over 20 years of working with homeowners with vintage windows and encountering problems has motivated us come up with this product. We have listened to vintage homeowners’ problems and concerns with their windows and we took action. Our mission was to create a quality product that would resolve issues such as insulation, noise, functionality and protection all while being aesthetically pleasing at a reasonable price.
There are a couple ways to get SLIPs on your windows-
Buy directly from us for self-install.. CLICK HERE
Have a handyman, window or carpentry contractor install for you

Commercial Buildings
SLIPs have successfully been put to use in many commercial buildings and results have been outstanding. Building occupants noticed how much warmer the building is and how much smoother windows operate when letting fresh air in. Building owners will definitely notice the month to month savings in energy bills.






