Slate & Tile Roof Damage Diagnostics
Premium roofs require premium forensics. A heavy boot will break a $50 clay tile just as easily as a massive hailstone. Learn how to tell the difference and prevent the adjuster from blaming human error.
The Tile Defense Index
Concrete, terra cotta clay, and natural slate roofs can last 50 to 100 years. They are virtually impervious to standard weather. Because they are so expensive to replace, insurance companies train their adjusters to look for any excuse to classify a broken tile as “Mechanical Damage” (caused by a human) instead of “Functional Damage” (caused by a storm).
1. The Foot Traffic Vandalism
Walking on a barrel tile or slate roof requires a specific technique (stepping on the overlap, distributing weight). Unvetted contractors, satellite dish installers, and even insurance adjusters frequently walk on the fragile centers of the tiles, snapping them under their boots.
If an adjuster snaps a tile during their inspection, they will not tell you. They will take a photo of the tile they just broke, note it in the file as “prior mechanical marring,” and use it as evidence to deny the rest of your storm claim.
2. Hail vs. Human: The Geometry of a Break
To win a tile claim, you must understand fracture geometry. Insurance carriers rely on forensic engineering principles to separate hail from humans.
- Foot Traffic (Human): When a boot crushes a tile, it creates a clean, linear snap. The most common foot traffic break is a snapped bottom right or bottom left corner (where the boot slipped), or a clean horizontal fracture across the center “belly” of the tile.
- Hail (Kinetic Impact): Hail drops from the sky in a sphere. When it hits a brittle surface like slate or clay, it creates a “Star Fracture.” You will see an impact crater with webbing/cracks radiating outward from a central point. Hail damage is also completely random; foot traffic forms a distinct walking path.
3. The Discontinued Tile Leverage
The “Harvesting” Scam
If you successfully prove that 15 tiles were broken by hail, the carrier will write a cheap estimate to patch those 15 tiles. However, tile molds change frequently. If your specific tile is discontinued, a new tile will not interlock with your old tiles.
The adjuster will suggest “Harvesting”—stealing tiles from the hidden back side of your house to patch the front, and putting ugly new tiles on the back. Do not accept this. In states with “Line of Sight” or matching regulations, a discontinued tile makes the roof unrepairable, legally forcing the insurance company to pay for a full $40,000 replacement.
4. The Adjuster Confrontation Script
If you have a premium roof, you should never let an adjuster inspect it without your contractor present. Before anyone puts a ladder against the gutters, you must establish liability.
“Before we proceed with the inspection of this [slate/clay/concrete] system, I want to clarify that we currently have documented, time-stamped drone photography confirming the exact number and location of the existing storm fractures. Any new mechanical fractures or corner snaps resulting from improper foot traffic during today’s assessment will be documented as adjuster liability and added to the scope of loss.”