Santa Ana Wind Damage: What to Check on Your Roof After a Windstorm
Santa Ana winds gust 40-80+ mph in LA, lifting shingles and breaking tiles. Here's what to inspect on your roof after a windstorm.
Santa Ana winds hit Los Angeles every fall and winter, pushing hot, dry air from the inland deserts through the mountain passes and into the LA basin. Gusts regularly reach 40-60 mph across the San Fernando Valley, foothill neighborhoods, and canyon areas. During strong events, gusts top 80 mph.
Those winds do real damage to roofs. The problem is, most of it happens where you can’t see it from the ground. Knowing what to look for after a windstorm helps you catch damage early, before the next rain turns it into a leak.
How Wind Damages Roofs
Wind doesn’t hit a roof evenly. The edges, corners, and ridgeline take the most force. As wind flows over a roof, it creates uplift, a suction effect that pulls roofing materials away from the deck. Think of it like a hand peeling tape from a surface.
The areas most vulnerable to wind uplift:
- Eaves and edges where shingles have the least adhesion
- Ridge caps along the peak of the roof
- Corners where two roof planes meet
- Flashing around chimneys, skylights, and vents
Once wind lifts one shingle or tile, the ones around it become exposed and more likely to lift next. A small area of damage grows quickly in sustained winds.
What to Check After a Santa Ana Event
Walk the Perimeter
After the winds die down, walk around your home and look at the roof from ground level. Use binoculars if you have them. You’re looking for:
- Shingles that are flipped up, creased, or missing entirely
- Tiles that have shifted or cracked
- Ridge caps that look crooked or displaced
- Flashing pulled away from walls or chimneys
- Debris on the roof surface, especially branches that may have punctured materials
Don’t go on the roof yourself unless you have experience and proper safety equipment. A professional roof inspection is safer and more thorough.
Check Your Gutters and Yard
Wind carries roofing material off your roof and deposits it below. Look in your gutters, downspouts, and around the base of your home for:
- Shingle pieces or granules (they look like coarse black sand)
- Broken tile fragments
- Metal flashing pieces
- Vent caps or pipe boots
Finding granules in your gutters after a storm is different from normal granule shedding. A concentrated pile of granules or actual shingle tabs means active damage, not routine wear.
Look at Your Attic
If you have attic access, check the underside of the roof deck after a windstorm. Look for:
- New spots of daylight coming through
- Water stains that weren’t there before
- Insulation that appears disturbed or displaced
Wind can drive rain sideways under lifted shingles. Even if it doesn’t rain during the Santa Ana event itself, the damage leaves openings for the next rain.
Common Wind Damage by Roof Type
Asphalt Shingles
Shingle tabs lift, crease, and tear off. The adhesive strip that bonds shingle layers together weakens over time in LA’s heat. Older shingles (10+ years) are more susceptible to wind lift because that adhesive has degraded.
A few missing shingles are a straightforward roof repair, typically $150-$400. But if a large section lifted, the underlayment beneath may have been exposed to UV and debris. That section needs closer inspection.
Tile Roofs
Individual tiles can shift, crack, or slide out of position. Clay tiles are more brittle and can break if struck by debris. Concrete tiles are tougher but still shift on steep pitches.
The mortar at the ridgeline and hip lines is a common failure point. High winds crack ridge mortar and allow tiles to loosen. Repair costs run $300-$800 for mortar and tile replacement on a section.
Flat Roofs
Single-ply membranes (TPO, EPDM) can develop lifted seams or punctures from blown debris. Modified bitumen can lose cap sheet material at edges. If your flat roof is on a garage, addition, or patio cover, check the perimeter after a wind event.
Metal Roofs
Standing seam metal handles wind well due to interlocking panels. But exposed fastener metal panels (common on sheds and carports) can have screws loosen or panels lift at the edges. Check fastener lines for gaps.
When to Call a Professional
Some situations need a roofer promptly:
- You see bare roof deck or underlayment. The protective layer is gone, and rain will get through.
- Multiple areas of damage. One or two missing shingles is a small repair. Damage across several sections suggests the roof took significant stress.
- Your roof is over 15 years old. Older roofs have weaker adhesion and may have developed structural vulnerabilities you can’t see from the ground.
- You notice a new leak inside after a wind event. Even a small ceiling stain means water found its way in.
If your home is in a canyon, at the mouth of a pass (Sepulveda Pass, Cahuenga Pass, etc.), or on a ridgeline, your roof takes harder hits from Santa Ana winds than homes in protected flat areas. Regular post-storm checks are more important in these locations.
Filing an Insurance Claim
If you have significant wind damage, your homeowner’s insurance typically covers it. Document the damage with photos before any repairs. Get a written estimate from a licensed roofing contractor. Contact your insurer to open a claim.
Keep in mind that normal wear and tear isn’t covered. Insurance covers sudden wind damage, not shingles that were already failing from age. An emergency roof repair to prevent further water intrusion is usually covered as a reasonable mitigation step.
Preventing Future Wind Damage
You can’t stop the Santa Ana winds, but you can reduce your roof’s vulnerability:
- Use wind-rated materials. When reroofing, choose shingles rated for 110+ mph or standing seam metal.
- Make sure installation is solid. Proper nailing patterns and adhesive application are the first defense against uplift.
- Maintain flashing and sealant. Tight joints resist wind-driven moisture and prevent peeling.
- Trim trees. Branches that break in windstorms cause puncture damage on top of wind lift.
Santa Ana winds are a predictable part of living in Los Angeles. A roof in good condition with proper materials and installation handles them without major problems. The damage happens when small issues go unaddressed and wind exploits the weak points.
If your roof took a hit in the last windstorm, or you want to make sure it’s ready for the next one, call Best LA Roofing at (818) 446-6122 for a post-storm inspection.