Out here in the valley, extreme heat and UV cook caulk lines and make vinyl/fiber-cement edges more brittle, so small gaps at joints turn into bigger problems over a couple summers. Because Las Vegas sits on loamy alluvial soils with caliche layers, stormwater can run off hard and splash back at the base of walls—then a monsoon burst finds the weak seam and you get staining, swollen trim, or soft sheathing in the worst spot. Add wind events and dust, and you’ll see fasteners work loose, panels chatter, and corners open up—especially on the west-facing sides that take the full afternoon blast. The usual homeowner tells are rattling in wind, visible buckling, popped nails, cracked caulk at trim, or water marks under a joint. The durable repair is targeted: re-secure and reflash where needed, replace damaged panels, correct the joint/trim seal, and match texture/color so the patch doesn’t scream “repair.” (This page type is from your Matrix list .)