Easily lift the sashes out of their tracks** to clean the exterior glass and sash surfaces. There's no need to get out a ladder or compromise clear views by cleaning with a hose.
We use the purest non-recycled vinyl, and twice as much of it, to construct heavier, stronger window frames. Typical frames sag and crack when a home or apartment building flexes or settles in response to many years of seasonal temperature changes. Our windows are designed to resist this pressure, and they last a lifetime as a result.
The numbers are absolutely clear: we are selling the most efficient double-pane window you can buy.*
Glass pack: Energy Star 6.0
Window: Energy Star 6.0
NFRC Authorized Certification: Certified in all categories
* Testing performed by Keystone Certifications in 2016.
**For especially large windows, it may be necessary to have two or more people lift the sash out of the tracks, as large dual-pane glass units are heavy.