Local Conditions
What actually shortens joint life in Coronado.
Salt is the problem nobody plans for. Sea air carries it inland as a fine mist that settles on the deck and works into every open joint, and once it is in there it crystallises, expands and prises the bead away from the concrete from the inside out. Blowing sand does the rest, scouring the top of the bead until it loses its surface. The other factor here is that there is no dormant season. A pool a few blocks from the water gets used most of the year, which means constant splash out, constant wet and dry cycling, and a joint that never gets a quiet month to sit still. Coronado is not unusual in that respect, it is simply typical of San Diego County. The pools near Coronado Village, The Cays, Coronado Shores and Country Club were mostly built within the same decade, so their joints are hitting the end of their service life at roughly the same time.



