Windows in Colorado take hail, a huge daily swing, and sun that is stronger than the latitude suggests. A storm can crack a pane or pit the glass and leave the frame looking fine. Freeze-thaw and dry air then open gaps the impact started. South and west glass loads a room on a winter afternoon when the sun is low and bright, and the same opening drafts at night. Mountain houses add ice, binding sash, and condensation. Plains houses add wind and dust. Western-slope houses add heat. One replacement pitch does not cover the state.
Say what happened. Cracked or fogged glass after a hailstorm, a rotten sill, a draft on the north wall, or a lock that will not catch. Count the openings and say which faces held the damage. An insert into a frame the hail or the rot has already compromised is a short repair. Full-frame work should name flashing, who patches stucco or brick, and how the sill sheds meltwater. Older brick openings in Front Range cities are often odd sizes. Cabin windows can be odd in a different way. Say which house you have.
Ask what fills the gap around the frame. At this elevation a hollow gap is a draft and a condensation path. Ask about the glass and the frame separately so a cracked pane is not automatically every window on the house. Do not center the call on a utility bill. Center it on impact, air leaks, and whether the unit still locks and sheds water. Wind-driven rain is less constant here than in a wet climate, and when it arrives it is often sideways with a storm.
A chinook day can bake the south glass and freeze the puddle at the sill by night. Say if that swing is when the draft or the fog shows up. Hail pits are a different complaint from that swing, and the call should hear which one you have before anyone lists openings.
Bring the count, the weather that did the damage, and the town. Call the number on this page.