Most houses in East Port Orchard went up around 1978, which puts this neighborhood squarely in the era of steel roll-formed doors on galvanized steel rollers - a step up from the wood doors of decades earlier, but still running nylon or steel rollers with no factory-sealed bearings. Forty-some years on, those original rollers are past due regardless of how well the door has been maintained. The regional climate here is mild with occasional freeze, which isn't harsh enough to crack panels the way a hard freeze-thaw cycle does further inland, but it's damp enough, close to the water, to work rust into steel roller stems and track edges over four decades. That combination - old steel rollers plus persistent moisture rather than temperature swings - is the specific failure pattern we see on this side of town, more than cracked panels or warped track. Houses built in this same window across the wider service area show the same pattern, which is one reason roller replacement shows up so often as a standalone call rather than bundled with bigger repairs. It's a maintenance-era problem, not a design flaw, and it's predictable enough that most of these doors are due whether or not they're making noise yet.