Open Sash

At Open Sash, we specialize in energy efficiency, weatherization, and restoration of old windows. Our unique system allows us to add glass to existing sashes, doubling the thermal resistance of the window without altering its appearance or functionality. This process can be applied to any type of window, from historic to modern, single or double hung, casement, or fixed. We also provide energy panels that are custom-made to fit your needs.

Our services include window retrofit seals, insulating weight cavities, adding glass, and window restoration, which includes lead paint removal, glass replacement, glazing, rot removal, and wood restoration. Additionally, we offer energy loss assessments, assessing energy loss through windows and doors, and general air sealing, sealing doors and windows.

Project Galleries

Our work spans across various projects, showcasing our expertise in transforming old windows into energy-efficient ones. We have successfully retrofitted hundreds of windows on houses throughout the northeast and Washington, D.C. Our latest addition is the mobile window wagon, designed to make the process of window retrofits even more cost-effective and convenient.

Testimonials

We take pride in our work and the positive feedback we receive from our clients. They appreciate our cost-effective solutions that not only enhance the energy efficiency of their homes but also preserve the original beauty of their windows.

News & Resources

Stay updated with the latest news and resources from Open Sash. Our blog shares stories of successful projects, new technologies, and tips on maintaining your home's energy efficiency.