Johnson City Garage Door Pros covers a service area where houses were built anywhere from 1958 to 2001, with the median landing around 1975. Elizabethton sits older than that median - the typical house here went up around 1964. That decade matters more than people think. A door built for a 1964 opening usually rides on narrower track than anything installed after the mid-70s, and the roller carriages from that era were never designed for the heavier insulated panels a lot of owners have since bolted onto the original frame. When the door is heavier than the track was built to carry, it takes less to knock a roller loose - a slammed door, a gust catching it halfway, even normal wear on an original bracket that's 60 years old. We come out from Johnson City, about 8 miles away, and what we see on these calls looks different from what we see on newer builds closer to the center of the service area: bent track from age, not from impact, and brackets pulled slightly off square because the lag screws have worked loose over decades in the same wood.