Concrete and masonry maintenance for Phoenix's climate
Updated July 2026
Concrete and masonry feel permanent, but Phoenix's heat and soil put real stress on both over time. A seasonal look at cracks and drainage catches small problems before they become expensive ones.
The seasonal check
Before and after monsoon season (roughly June through September), walk your patio, driveway, and any block walls looking for new or widening cracks, pooling water that is not draining away from the foundation, and any settling or unevenness in slabs. Monsoon downpours move a lot of water fast, and it is one of the best times to see whether drainage around concrete and masonry is actually working.
Heat, expansion, and desert soil
Concrete expands and contracts with Phoenix's big daily temperature swings, which is why control joints (the intentional grooves cut into a slab) exist, to guide cracking to a controlled spot rather than a random one. Arizona's clay-heavy soil in some areas also expands and contracts with seasonal moisture changes, which can shift slabs and wall footings gradually over years. Both are normal to a degree; it is rapid or widening change that is worth a professional look.
What you can do vs. call a pro
Homeowners can seal hairline cracks in a slab with a basic concrete crack filler, keep drainage clear of leaves and debris, and monitor for changes after storms. Structural cracks, a leaning or bulging wall, or any slab that has visibly settled or heaved are licensed-pro work, both to diagnose the underlying cause and because a failing masonry wall can be a genuine safety hazard.
Frequently asked questions
Why does my concrete patio keep cracking?
Some hairline cracking is normal as concrete cures and as it expands and contracts with Phoenix's heat, and control joints are designed to guide that cracking to a controlled spot. Wider, spreading, or new cracks after a storm can point to soil movement or drainage issues underneath and are worth a professional look.
Should I check my walls before monsoon season?
Yes. Monsoon rain and wind can expose or worsen an already-weakened wall. A quick check for leaning, cracking mortar, or poor drainage before the season starts lets you catch a problem while it is still a simple repair.