Local Conditions
What actually shortens joint life in Hollywood Hills.
The canyon communities have two things working against the joint at once. Underneath, graded lots settle unevenly for a long time. Overhead, the canyon pulls warm air through by day and drops it sharply at night, so the daily temperature swing here is wider than a few miles away on the flat. Wide swings mean more expansion and contraction, and more cycles through the bead every year. Hollywood Hills is not unusual in that respect, it is simply typical of Los Angeles County. The pools near Outpost Estates, Nichols Canyon, Laurel Canyon and Mount Olympus were mostly built within the same decade, so their joints are hitting the end of their service life at roughly the same time.



