What Damage Can Heavy Snow Falling off a Roof Cause?

The sheer weight and force of a large slab of sliding snow can cause significant exterior damage. Gutters and downspouts are often the first to fail, getting bent or torn completely away from the fascia board. Siding, especially vinyl or wood, can be cracked or shattered by the impact. Lower-level windows, patio furniture, and even vehicles parked too close to the house are also at serious risk.

Snow falling off often leaves a ridge of compacted ice and snow at the roof's edge, known as an ice dam. This dam prevents melting snow from properly draining into the gutters. Water then backs up under the shingles and into the home. The backed-up water can soak insulation, ruin drywall, and damage personal belongings in the affected rooms. This is a common issue in areas with an oceanic climate with mild wet winters and dry summers.

• Water seeps under roof shingles and into the attic.
• Soaked insulation loses its R-value and promotes mold.
• Ceiling drywall becomes stained, saggy, and may collapse.
• Interior paint peels and blistering occurs on walls.
• Electrical fixtures and wiring in ceilings can be compromised.
• Personal items in closets or upper floors get water damaged.

First, ensure everyone's safety and do not go near areas where more snow could slide. Visually inspect your gutters, downspouts, and siding for obvious damage from a safe distance. Check your attic for any signs of new moisture, stains, or dripping water. If you find water inside, contact local water damage pros for an inspection. Acting quickly can prevent a small leak from turning into a major repair project.

• Safety first: avoid standing under roof edges with heavy snow.
• Inspect gutters, downspouts, and siding for new dents or tears.
• Look in your attic for wet insulation or water stains.
• Check ceilings and walls inside for new discoloration or dampness.
• Clear snow piles away from foundation drains if it is safe.
• Document any damage with photos for an insurance claim.