EFFICIENCY WITHOUT COMPROMISE
SLIP™: The Slim, Smart Upgrade for Historic Windows.
SLIP is a high-performance insulating solution engineered for use in historic and retrofit window assemblies. Installed over existing glazing, it enhances thermal performance without altering original sash profiles, materials, or sightlines—making it ideal for preservation-sensitive projects. Most original wood windows have already lasted 80 to 100 years, and with proper restoration and a SLIP insulating system, they can easily outlast modern replacements that often degrade in just 20–30 years.
Our Clients
OUR APPLICATIONS
Window SLIP Applications
A custom, aesthetically pleasing answer to drafty and difficult-to-replace windows. SLIP adds a pane to each sash, either interior or exterior, retaining the original window glass. Enjoy your original architecture with this cost-effective, energy-efficient solution!
Heritage Regulation Compliance
For buildings under historic registry, visual integrity and reversibility are key to compliance. SLIPs meet these standards while providing discreet thermal upgrades. They preserve original sash, muntins, and profiles—meeting requirements for both residential and commercial preservation boards.
Energy Efficiency
Older windows can be very high quality, but if the original window glass is single pane, you are likely losing heat or cold through those windows, driving up the cost of your energy bill. Our SLIPs can reduce your energy bill by up to 72% and will help improve energy efficiency for the life of the windows.
Cost-Effective Upgrade
Adding a SLIP is a cost-effective upgrade solution compared with window replacement. A permanent, more stylish version of a storm window, SLIPs extend the life of your existing windows and maintain the home’s look and feel, while providing modern double-pane efficiency.
OUR COMPANY
From a Trusted Name in Window Repair and Restoration Comes an Innovative Efficiency Solution
SLIP is a sustainable solution that allows you to maintain what you have rather than taking on the expense of replacing existing windows. We are a part of the Chosen Wood Window Maintenance family, with a team that boasts decades of experience repairing, restoring, optimizing, and creating new solutions for windows.
OUR APPLICATIONS
Our Custom Slim Line Insulating Pane Systems
You’re only three steps away from delivering a custom-fit, slim-line insulating pane to your client. We’re happy to provide you with a quote at no cost. If you’re considering slim-line insulating panes for your client’s project, we’re here to help.
Step One
Provide Your Measurements and Request a Quote
Step Two
Review Your Quote & Place Your Order
Step Three
Your Order is Made & Arrives Within 8-10 Weeks
Testimonials
How Do Our Window SLIPs Work?
Window SLIPs are custom-made to fit the exact specifications of your residence or business. They are installed by contractors, architects, or licensed professionals. Because of their slim lines and clear glass– they’re nearly invisible once put on your window.
Custom Fabrication
Each SLIP is custom-fabricated to match the daylight opening of the sash and mounts securely to the interior or exterior face of the sash, depending on configuration. The system includes a slim-profile aluminum frame and high-performance glass, installed by trained contractors or preservation professionals. The low-profile frame can be painted to match your window and disappear. This allows your original window to show through as if no alterations were made.
Professional Installation
Windows remain fully operable, and in some cases, painted-over or damaged windows can be fixed utilizing Window SLIPs. Our systems come with all installation hardware included. In your package you’ll find hanging balances, weatherstripping, screws, and tabs.
Questions about Installation? Check out our Frequently Asked Questions page or this how-to video.
Cost-Effective Upgrade
Adding a SLIP is a cost-effective upgrade solution compared with window replacement. A permanent, more stylish version of a storm window, SLIPs extend the life of your existing windows and maintain the home’s look and feel, while providing modern double-pane efficiency.
Get A Free Quote for Your Project
We work directly with contractors, architects, and restoration firms to deliver the best value on the market. Each project is unique, especially when dealing with vintage windows; that’s why we provide free quotes for the specific measurements and needs of every home. Contact us to get started today!
Backed By A Ten Year Warranty
With decades of experience in window restoration and repair, our team understands how to collaborate with industry professionals to deliver the highest quality results for homeowners. Our Window Slip system is backed by a 10-year manufacturer’s warranty. Trust us with your next project and let us show you why we’re the slim line pane experts.