Windows in Longmont, CO

Out at the mouth of the St. Vrain Valley, Longmont sits lower and more exposed than the foothills to the west, and that open-plains position is exactly why windows do so much work here. On a clear Longmont day the temperature can swing 30 to 40 degrees between a frigid dawn and a sun-baked afternoon, and the high-altitude UV that comes with it bakes south- and west-facing glass year-round. Single-pane and tired early double-pane units simply can't keep up: they sweat with condensation, leak heat in January, let the August sun cook the living room, and quietly drive heating and cooling bills higher than the size of the house should ever justify.

CR Custom Exteriors installs energy-efficient replacement windows built for those exact conditions, with Low-E, argon-filled double- and triple-pane glass that tames the day-night swing and blocks the UV. The right answer looks different across town: the older bungalows around Old Town and Downtown Longmont often need full-frame replacement and careful egress sizing, while newer homes in Prospect New Town, Southmoor Park, and Fox Hill are hitting the age where original builder-grade windows start failing. As a family-owned, licensed and insured contractor based just down the road in Erie with 10-plus years on the Front Range, Owens Corning Platinum Preferred status, and a 4.9-star rating across 150-plus Google reviews, we spec vinyl, fiberglass, or composite frames to the home, then install to manufacturer spec with proper flashing so the wind and weather stay outside.