The service area overall runs from houses built in 1938 up through 1995, with a median around 1972 - Grantley sits on the older end of that, with a median build year closer to 1961. A door and track system from that era was built for a lighter single-layer panel, often on a narrower stall than what gets framed today, and after sixty-plus years the jamb has usually settled a little, which throws the whole opening out of square. Add the climate: this area sits in a cold, severe winter band, and an uninsulated 1961 door does nothing to stop that cold from sitting against the wall it shares with the house. With about 969 households in Grantley and a median income of $121,563 - well above the $80,694 median across the wider York service area - a lot of these homeowners are in a position to replace rather than patch, and that's often the right call once the frame itself has moved.