“The framing material is perhaps the most integral part to have a look at, so compare the features of aluminum to wood, vinyl, and other frames. Vinyl are considered to be more cost-effective as they are more energy-efficient, easier to install, and require no further sealing or staining. Windows with double glass panes or two layers of gas-filled glass are proven to effectively keep the heat inside or out, so that could be a viable option for you as well.
You should also look into the benefits of installing custom-made replacement windows. Fortunately, several credible companies providing Colorado Springs window replacement services, such as Renewal by Andersen, offer top-notch yet affordable custom window installation.”
http://www.loveyourwindows.com/things-to-consider-before-you-install-new-windows-in-colorado-springs/
Renewal by Andersen of Denver 