St. Louis is home to some of the most architecturally significant residential neighborhoods in the Midwest. Soulard, Shaw, Tower Grove, the Central West End, Lafayette Square, and Compton Heights feature homes with slate, clay tile, and other historic roofing materials that are 50 to 100+ years old.
These roofs present unique challenges for storm damage assessment, insurance claims, and repair. Understanding the differences is essential for homeowners in these neighborhoods.
How Historic Roofing Materials Respond to Hail
Slate roofing is one of the most durable materials ever used in residential construction. A well-maintained slate roof can last 100 to 150 years. However, as slate ages, it becomes more brittle and susceptible to impact damage. A 100-year-old slate shingle will crack from hail impact that a 30-year-old slate shingle would easily withstand.
Hail damage on slate appears as chips, cracks, or puncture marks — often at the corners or edges of individual tiles. Unlike asphalt shingles where damage is often invisible from the ground, slate damage can sometimes be seen from below, though a close-up inspection is still necessary to assess the full scope.
Clay tile roofs respond similarly to slate. Hail can chip edges, crack surfaces, and in severe events, puncture tiles entirely. The challenge with clay tile is that replacement tiles must match the existing material in size, shape, color, and profile — and for truly historic installations, exact matches may require specialty sourcing.
The Assessment Challenge
Assessing storm damage on historic roofs requires an inspector who can distinguish between several categories of damage. Storm damage from hail shows fresh impact marks, sharp edges on fractures, and random distribution across the roof surface consistent with hailstone impact patterns.
Age-related deterioration shows uniform weathering, rounded edges on worn surfaces, gradual delamination (on slate), and patterns that correlate with sun exposure rather than random impact. Installation damage from original or previous repair work shows patterns localized to specific areas where tools or foot traffic caused marks.
Getting this distinction right matters enormously for insurance claims. If storm damage is misidentified as age-related wear, legitimate damage goes uncompensated. If age-related wear is misidentified as storm damage, the claim may be denied entirely when the adjuster recognizes the discrepancy, undermining the credibility of the entire assessment.
Insurance Considerations for Historic Roofs
Historic roofing materials create special insurance considerations. Replacement cost for slate or clay tile is significantly higher than for asphalt shingles — sometimes several times higher per square foot.
Some policies include provisions for matching existing materials when partial replacement is needed. If your roof has a distinctive pattern, color, or material that requires specialty sourcing, your policy may cover the cost of matching — but you need to verify this before filing.
Some insurers have applied cosmetic damage exclusions to historic materials, arguing that chips or cracks that don’t immediately affect waterproofing are cosmetic rather than functional. This is a contentious area, particularly for slate roofs where even small damage points can lead to accelerated deterioration over subsequent seasons.
For ACV policies, depreciation on a 100-year-old roof can reduce the payout to near zero, even though the materials may have had decades of remaining useful life. RCV coverage is essential for historic roof claims.
Repair vs. Replacement
One advantage of slate and tile roofs is that they can often be repaired rather than fully replaced. Individual damaged tiles can be removed and replaced without disturbing the surrounding material. This makes repairs less disruptive and often less expensive than full replacement.
However, finding qualified slate and tile repair specialists is challenging. Not every roofing contractor has experience working with these materials, and improper repair work can cause more damage than the original storm impact.
SDAT inspectors are trained to assess damage on all roofing materials, including historic slate and clay tile. Our Roof Report Card documents the specific type, condition, and damage patterns of historic materials so that both the homeowner and the insurance adjuster have accurate, professional documentation.
Neighborhood-Specific Considerations
Soulard and Benton Park feature primarily residential slate roofs from the late 1800s. Many of these roofs have had partial repairs over the decades with materials that may not exactly match the original installation.
Shaw and Tower Grove South have a mix of slate, clay tile, and early asphalt installations. The varying materials on a single block can make neighborhood-wide storm damage assessment particularly important — if asphalt roofs on your block show damage, your slate roof almost certainly took the same impacts.
The Central West End and Compton Heights feature some of the most architecturally complex historic roofs in the metro, with multiple slopes, dormers, and decorative elements that create additional vulnerability points.
Regardless of neighborhood, the key principle is the same: historic roofing materials require inspectors who understand the material, can distinguish storm damage from age-related wear, and can document findings in a way that meets insurance standards. A generic roof inspection is not sufficient.