Interstate double hung windows provide an exceptional value. They will operate with the lightest effort of any window on the market. For complete piece of mind, our double hung windows, like all our windows, come with a limited lifetime warranty that is transferable if you decide to sell your home.
All Interstate double hung windows are built with the Light-Lift II Window Sash Balance System. Minimal effort is required to operate windows with Light-Lift II balances, making our windows much easier to open and close. Adjustments are never required with these windows!
Designed for budget conscience projects, the model 4000 master frame matches all double hung units available for cost savings and creative bidding on any replacement or new construction projects.