We come out from Greenwood Village, about 8 miles, and start with the same checklist regardless of which of the 28 named areas in the service territory the house sits in: spring tension, cable wear, track alignment, opener force and travel limits, and weatherstripping condition. On a Stonegate door from the late 90s, we pay particular attention to the header bracket and the center support bearing, since those are the parts that loosen first under repeated cold contraction. If a spring or cable is close to failing, we'll say so and quote the replacement separately rather than patch it as maintenance - a door held together by an undersized fix in a cold climate is a call-back waiting to happen, and we'd rather tell you that up front than come back in January.