Viridian Window Restoration brings the
Bi-Glass System to the West Coast!
With over 15 years of successfull historic restoration work on the East Coast, the patented Bi-Glass System® is now availible in the Pacific Northwest! The Bi-Glass System® will replace single pane glass with high-quality insulated glass while still retaining your old sash, including divided lights! Reusing your old sash saves money and maintains the architectural integrity of your house or commercial property. After adding new weather-stripping and locks (or keeping your old locks if they're in good shape), you will have a truly energy-efficient window unit that will keep you warm in the winter and cool in the summer.
There are a number of options for balancing your sashes once the glass has been replaced with new energy efficiant insulated glass units:
- You can keep the original sash weights and pulleys! We will replace any broken components and install new sash cords and some added weight to compensate for the heavier double pane glass. This option is our preferrence as we are historic preservationists at heart!
- The next option is installing new spring tape balances. Tape balances have been used for over a hundred years and take the place of the weight and pulley system. They are mounted in the pulley holes and have a flat spring tape that replaces the sash cord. This system is good for large windows. With this option the weight pockets can be insulated.
- Another option is installing new invisable spring balances. With this option the sash cords are removed along with the sash weights and the empty pocket is insulated.
- Finally, you can install vinyl jambliners that allow you to tilt the window out for easy cleaning & painting. This requires a portion of the sash to be cut away to allow for the jambliner. In some cases this option may be the most convenient. As with the 2nd and 3rd options above, the weight pocket can be insulated.