Arizona home roof under winter storm clouds

Winter Rain in Phoenix: 7 Roof Checks That Prevent Surprise Leaks

Arizona's winter storms can expose small roof issues fast. Use this quick checklist to prevent ceiling stains, attic moisture, and emergency repairs, especially on tile and shingle systems common in Phoenix metro.

Luke Economou
January 17, 2026
6 min read
winter rainroof leak preventionPhoenixtile roofsroof inspectionattic ventilation
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Why Winter Rain Finds Leaks You Never Knew You Had

Phoenix winters are usually dry, until they aren't. When we get a multi-hour rain event, water has time to work into small cracks around flashings, skylights, and tile penetrations. The result is often a 'mystery stain' that shows up days later, not during the storm.

The 7-Point Winter Roof Check (Phoenix Metro)

  • Walk the perimeter: look for slipped tiles, lifted shingle edges, or debris piled in valleys
  • Check roof penetrations: vent boots, pipe flashings, and satellite mounts are the top leak starters
  • Inspect valleys and transitions: where two roof planes meet is where water concentrates
  • Look at eaves/drip edge: staining or rot at the fascia is a common “slow leak” clue
  • Peek in the attic: damp insulation, musty smell, or dark wood means moisture is present
  • Verify bathroom fan venting: fans venting into the attic can mimic a roof leak
  • Clear scuppers/drains (flat roofs): standing water shortens coating life and finds weak seams

Pro tip: If you see a ceiling stain, take a photo immediately and note the date of the storm. That timeline helps pinpoint the entry point during inspection.

Tile Roof Owners: Underlayment Is the Real Waterproofing

Tile is a shedding surface, not a sealed lid. If your underlayment is aging (common at 15-20 years in Arizona heat), winter rain can reveal brittle laps and failed flashings. A tile roof can look perfect from the street while the underlayment underneath is at end-of-life.

Free Winter Leak Check (No Pressure)

We'll inspect the common winter leak points and give you a clear plan: repair vs. maintenance vs. replacement.

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