Compact lots, fall winds and slipping tiles
Because houses sit close together, roofs share wind patterns, and a gust that loosens tiles on one house may do the same next door. Santa Ana winds in fall and winter can lift tile edges, move ridge caps and drop debris from trees onto the roof. Slipped or cracked tile is a familiar sight afterward.
Foot traffic is another cause. Tile cracks under a heavy step, so contractors for solar panels, satellite dishes and cleaning can leave damage behind. A roof walk after any visit by another trade is wise. Homes with panel arrays also need careful handling, since the array may have to be detached before any work and reset afterward.

