Why Exterior Prep Matters More Than Interior Prep
Most homeowners think about monsoon prep in terms of patio furniture, pool covers, and potted plants. Those matter — but the highest-consequence preparation happens to your home's exterior systems: gutters, roof, windows, stucco, and drainage pathways.
When an Arizona haboob or monsoon cell hits, wind-driven dust and debris hits at 40–60+ mph. Saturating rain follows within minutes. If your exterior surfaces have compromised stucco, clogged gutters, damaged roof tiles, or poorly sealed window frames, water finds a way in — fast. The damage from one unchecked entry point can cost thousands in repairs.
Gutter and Downspout Inspection
Clear all debris from gutters — dry season accumulation of desert dust, pollen, and plant material can partially block gutters by early June. Test every downspout by running a hose through it to confirm free flow. Look for low spots where water pools rather than draining — these indicate sag from loose hangers or settling.
Check gutter seams and end caps for gaps. Arizona's heat cycles cause expansion and contraction that can open previously sealed joints over a season. A small gap becomes a waterfall during monsoon overflow.
Roof Inspection
Walk the perimeter and visually inspect from ground level — look for displaced or cracked tiles, debris accumulation in valleys, and lichen or algae growth on the north-facing slopes (common in Scottsdale). Organic growth on tile absorbs moisture and can accelerate mortar degradation.
Check flashing at all penetrations: vent pipes, HVAC units, chimneys, and skylights. Flashing that has lifted or cracked allows water intrusion during heavy rain. A professional roof inspection before June can catch issues that would otherwise become interior leaks by August.
Window and Door Frame Inspection
Examine weatherstripping around all windows and exterior doors. Arizona's intense UV and heat cycles degrade rubber and foam seals faster than in milder climates — what sealed fine last fall may have significant gaps by June. Replacement weatherstripping is inexpensive and takes minutes to install.
Check window frame caulking at the junction between frame and stucco. Cracks in exterior caulk allow wind-driven rain to enter the wall cavity. Apply exterior-grade, UV-stable silicone caulk to any gaps before monsoon season.
Clean your windows before the season starts. Mineral deposits and dust on glass can trap water and organic debris during storms, accelerating staining and potentially sealing improperly around frames.
Stucco and Exterior Wall Inspection
Inspect stucco for hairline cracks, particularly at corners, around window frames, and at transitions between stucco and other materials. Hairline cracks are normal in Arizona's thermal climate but should be addressed with elastomeric caulk before monsoon season to prevent water intrusion.
Check for efflorescence — white chalky mineral deposits on stucco surfaces — which can indicate existing moisture intrusion from previous seasons. This should be investigated and addressed before additional water exposure.
Consider a pre-monsoon exterior soft wash to remove dust accumulation, organic deposits, and biological growth from stucco. Clean stucco repels water more effectively than dirty, dust-laden surfaces, and soft washing reveals surface condition issues that buildup might otherwise conceal.
Drainage and Grading
Ensure the grading around your home's foundation slopes away from the structure. Arizona soil compacts and settles over time, and what was properly graded at construction can develop low spots that direct water toward the foundation.
Clear all area drains and French drains of debris. Test them with a hose to confirm they accept water flow. A blocked area drain during a 2-inch-per-hour monsoon event creates an instant flood.