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Can Hail Damage Windows and Siding?

Last updated October 26, 2026

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The short answer

How Hail Damages Windows

Hail hits windows with enough force to crack glass, especially if the stones are large or driven by wind. A single impact can create a small chip that spreads into a full crack over time. Double-pane windows may look fine on the outside but lose their seal, allowing moisture to collect between the panes.

Check window frames and sills for dents or chips too. If you see a crack or notice fogging between panes, that signals seal failure. Water can then seep into walls, leading to rot or mold. Document any damage with photos and notes before you call for help.

  • Cracks or chips in the glass
  • Fogging or moisture between panes
  • Dents or splits in window frames
  • Broken or loose seals
  • Water stains on sills or walls

How Hail Damages Siding

Vinyl siding is especially prone to hail damage. A hard hit can crack or shatter the panels, leaving holes that let water behind the siding. Metal siding, like aluminum or steel, often shows dents that may not leak immediately but can weaken over time. Wood siding can split or show impact marks.

Even if damage looks minor, it matters. Cracks and holes allow water to reach the sheathing and insulation underneath. That moisture can lead to rot, mold, and structural issues. Inspect your siding after a storm, focusing on the side facing the wind and any areas where hail collected.

  • Cracks, holes, or missing pieces
  • Dents or dimples in metal panels
  • Splits or gouges in wood
  • Loose or warped sections
  • Water stains or soft spots beneath

What to Do Right After Hail

Act quickly to limit further damage. Cover any broken windows with plywood or plastic sheeting to keep rain out. For siding, tarp large holes to block water entry. Take photos of all damage, including the hail itself if you have a sample, and keep a list of what you see.

If you live in Oakland, keep a written record of storm dates and damage notes. That helps when you talk to your insurance company. Do not attempt major repairs on your own. Instead, contact local water damage pros to assess the situation and prevent moisture from spreading.

  • Take photos of damage from multiple angles
  • Cover broken windows and holes with tarps
  • Keep a written list of affected areas
  • Note the date and time of the storm
  • Avoid walking on damaged roofs or siding

Why Moisture Damage Follows

Hail damage is often a doorway for water. A cracked window or split siding lets rain enter, and that moisture can soak into drywall, insulation, and wood framing. Over time, it leads to mold growth and weakened structures. The longer water sits, the more extensive the damage becomes.

That is why a professional inspection matters. The pros can check for hidden moisture behind walls and under siding, using tools to detect dampness. They can also help dry out affected areas before mold takes hold. Catching water damage early reduces the scope of repairs needed.

  • Hidden moisture can rot wood framing
  • Mold may grow within 24 to 48 hours
  • Drywall can crumble after soaking
  • Insulation loses effectiveness when wet
  • Structural damage may require major repairs

When to Call the Pros

If you see any sign of water getting into your home after hail, call local water damage pros. They can inspect windows, siding, and the interior for moisture. Their work usually involves drying, cleaning, and repairing affected areas to prevent further issues. You do not need to wait for visible damage to appear.

Before you call, check your insurance policy to know what is covered. Policies vary, and your insurer decides what is covered. Document everything and keep receipts for temporary fixes. The pros can help with documentation for your claim, but the outcome depends on your policy and the damage details.

  • Visible cracks or holes in siding
  • Water stains on walls or ceilings
  • Musty smells or visible mold
  • Warped or buckled flooring
  • Peeling paint or bulging drywall

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Frequently asked questions

Can small hail damage windows?

Yes, even small hail can chip glass if driven by wind. A chip may not leak right away, but it can grow into a crack. Check for any impact marks and seal them temporarily if needed.

Does hail damage always cause leaks?

Not always, but it can. Cracks in windows or siding may let water in during rain. Even if you see no leak, hidden moisture can accumulate. A professional inspection can detect dampness behind walls.

Should I repair hail damage myself?

Minor cosmetic dents might be left alone, but any crack or hole should be addressed. DIY repairs often fail to stop water. For structural damage, contact the pros to ensure proper drying and repair.

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