Expert Garage Door Repair,
Service, & Installation in
Covina, CA

The 1950s row is the one that stands out in Covina, and it stands out honestly — of the 17,112 housing units the census counts here, 5,888 were finished between 1950 and 1959 against 4,069 in the decade after, 1,819 apart with 674 of sampling error on that difference. What is easier to miss is how short the table is underneath it. 602 units date from 1939 or earlier and 390 from the 1940s, and that 1940s row is no bigger than the newest full decades on the same table — 390 against 386 from the 2000s and 358 from the 2010s, the widest pair of those three 32 apart against a margin of 189 on it, which leaves the three of them unranked.

That short bottom end is why the middle of the stock sits where it does. With so little underneath it, the 1950s row is near the bottom of this table rather than in the middle of it, and the median build year lands past it altogether — the census puts Covina's at 1964, with a margin of one year on it. 10,232 of the 17,112 units were finished after 1959. So the biggest decade is poor shorthand for how old this housing is. It counts homes. The median measures elapsed time, and elapsed time is the whole of what any build year hands a garage door.

The same ambiguity turns up in the driveway. Ask how old a door is and there are two answers — the day it was fitted, which is written down nowhere, and what it is doing now, which is in front of us. Only the second one can be settled, and it is the one the work runs on: what the door does under power, what it does with the opener uncoupled and the weight left to the springs, what the track has already been through and what is holding it up today. Springs, cables, rollers, hinges, track and the openers over them are what we work on in Covina. The build year goes in the notes, and it is the least specific thing on them.