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An affordable and high-performance energy efficiency window retrofit solution

April 2021
Gallery WindowSkin 1
Gallery WindowSkin 1


The Solution is a transformative window retrofit solution that provides as much insulation as an added pane of glass at an affordable price. WindowSkin panels are attached to the inside window glazing of existing windows optimizing the volume of air trapped in between the existing window and the window insulation retrofit. Like the gap between panes in a double-pane window (or the pockets of air in a down comforter), this layer of enclosed air – and its thickness in particular – creates an insular barrier and improves the efficiency of the window. The WindowSkin is designed specifically to optimize the thickness of this enclosed layer of air, maximizing its thermal insulation properties. Plus, each panel is custom-manufactured to fit the existing window exactly, with a patented design that minimizes the possibility of air leakage to optimize the thermal barrier.

Label Date April 23, 2021
From United States
Maturity stage Initial market commercialization
Looking For Network, New clients, Visibility, Funding, Partners, Credibility

Implementation Stories

WindowSkin by WexEnergy
Implemented by Taitem Engineering in Ithaca (United States) in 2019

Taitem Engineering, PC, an engineering consulting firm based in New York State, installed the Solution to improve window performance and comfort of a 100+ year-old building with single-pane and exterior storm windows. Like so many property owners around the world, replacing their windows was not a cost-effective investment for this Client. As a result, WindowSkin® panels were installed on around 76% of the windows in this building.


12% annual reductions in natural gas consumption were measured for the building


The environmental benefits

  • Provides an additional R value of 0.7 and enables a visible light transmission ratio of 90%, making WindowSkin's practically invisible
  • On-site maintenance staff can self-install WindowSkins with just 30 minutes of training by a WindowSkin specialist
  • Can be used in historically designated buildings because installation doesn't change the appearance of the building, is technically “reversible”, and maintains windows operability as the windows open and close, just as they did prior to WindowSkin install
  • WindowSkin Insulating Retrofits reduce energy loss by 45% on single-pane windows and 22% on double-pane windows
  • WindowSkin panels are made with durable GreenGuard® and Cradle- to-Cradle™ certified materials and 100% USA based supply chain
  • In buildings constructed prior to the 1970s, WindowSkin's installation does not disturb underlying site conditions such as lead paint

The Financial benefits

  • Windowskin provides up to 75% of the insulation improvement of a new Energy Star® window for less than 15% of the cost of replacement windows
  • WindowSkin provides up to a 10 times faster payback than replacement window and almost 5X faster payback than our nearest priced window retrofit competitor

Activity Region

  • /

North america

United States,

  • Headquarters
  • Activity

Company Profile


New, simple to install efficient window insulation panels. WindowSkins work 24/7 to save energy escaping through your windows. One-click and they're installed! Nearly invisible, long-lasting and durable with guaranteed savings on your energy bills.

View company profile Solution website
Headquarters Rochester, NY 14604, USA

Related Topics

Contact the Solution Provider Add to Favorites

The information set out above, is solely for the purposes of information and the Solar Impulse Foundation does not provide any guarantee as to its authenticity, completeness or accuracy. This information does not constitute investment advice or a recommendation to buy into, transact or to enter into any agreement with any of the parties or persons mentioned above. Potential investors or interested parties are solely responsible for their investment or business decisions and for performing any due diligence required by the circumstances. The innovator WexEnergy has asserted ownership of the intellectual property rights for images, videos, and content showcased above, affirming full and unrestricted usage rights, and has provided explicit permission for the Solar Impulse Foundation to publish such information designated as "public" in the application form.