Most Miami foundation problems are water problems first: our rain arrives in bulk, our soils move fines when saturated, and the slab rides whatever the water leaves behind. The cheapest foundation repair is the drainage correction that makes the repair unnecessary.
Roof water, concentrated wrong
Downspouts dumping at the slab edge concentrate thousands of gallons against the foundation each wet season. Extensions, splash management, and gutters that actually connect are trivial money against what they prevent — and their absence is legible in settled corners under roof valleys.
Grading that aged backwards
Landscaping builds up, soil settles, and suddenly the yard drains toward the house. The fix is restoring fall away from the slab — six inches over ten feet as the classic target — before any hardscape locks the problem in place.
Irrigation and the thirsty-tree cycle
Sprinklers soaking one slab edge daily create the exact moisture differential slabs hate; big ficus and oaks pull moisture seasonally and the soil breathes under the footing. Zone the irrigation away from the slab and give trees root management rather than removal panic.
The wet-season audit
Walk the house during a real storm once a year: where water sheets, pools, and disappears is the whole diagnostic. Fix what you see that afternoon — most of it is an afternoon — and photograph the rest for the professional conversation.
The afternoon that saves the slab
Extend the downspouts, restore the grade, re-aim the sprinklers, and watch one good storm to grade your work. In this climate that afternoon is the highest-return foundation spend that exists.
If settlement signs already showed up, do the water work anyway — every repair quote gets smaller when the cause is already fixed.
