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How to Handle Flat Roof Hail Damage in San Antonio 

Posted on April 24, 2025

How to Handle Flat Roof Hail Damage in San Antonio 

When severe hailstorms sweep through San Antonio, flat roofs face challenges that pitched roofs don’t. The direct impact of hailstones on flat surfaces can lead to significant damage that might not be immediately visible to property owners. Unlike sloped roofs that can deflect some of the impact, flat roofing systems absorb the full force of falling hail, making them more susceptible to punctures, tears, and structural weakening.

Commercial buildings throughout San Antonio typically use materials like TPO membranes, modified bitumen, built-up systems, or EPDM for their flat roofs. Each of these materials responds differently to hail impacts. TPO membranes may show circular indentations or cracks, while built-up roofs might experience crushed aggregate or exposed asphalt. These vulnerabilities can lead to water infiltration, reduced energy efficiency, and shortened roof lifespan if not addressed.

After a hailstorm passes through the area, an inspection is critical for both residential and commercial flat roofs. These inspections, when conducted by professional roofers in San Antonio, identify all signs of damage from subtle dents to seam separation. Understanding the specific ways hail damages flat roofs helps property owners make informed decisions about repairs and maintenance, ultimately protecting their investments against San Antonio’s unpredictable weather patterns.

Identifying Signs of Hail Damage on Your Flat Roof

Detecting hail damage on flat roofs requires both vigilance and expertise. Property owners in San Antonio can perform initial assessments by looking for certain telltale signs from ground level. Check for loose or displaced roofing materials around the building perimeter, visible dents in metal flashing or roof vents, and water staining on interior ceilings, which may indicate post-hailstorm leaks. For TPO membrane roofs, watch for whitish marks where the protective top layer has been compromised by hail impacts.

However, many forms of flat roof hail damage are invisible to untrained eyes. Professional San Antonio roofing contractors identify subtle indicators such as microscopic membrane punctures, subsurface compression damage, and loosened seams between roofing panels. These professionals examine the roof’s substrate for hidden moisture infiltration and test the membrane’s continued water-resistance capabilities. On commercial flat roofs, they’ll assess drainage systems, which are often displaced during severe hailstorms.

The timing of the inspection matters significantly. Even seemingly minor hail damage can deteriorate rapidly under Texas sun exposure, turning small issues into major repair projects. San Antonio property owners should schedule professional flat roof inspections immediately after hailstorms, ideally within a week or two, to document damage accurately for insurance claims and prevent secondary problems from developing. Early detection of hail damage means repairs are quicker and more affordable, and helps maintain your flat roof’s integrity.

The Impact of Hail on Different Flat Roof Systems

Not all flat roof systems handle hail impacts the same way. In San Antonio, where intense hailstorms can strike with little warning, understanding how roofing materials respond to hail is crucial for property owners. TPO membranes often show bruising or circular indentations after hail exposure, though they may recover their shape in warmer temperatures. More severe impacts can fracture the membrane, creating entry points for water.

EPDM rubber roofs typically demonstrate good impact resistance but can be punctured by larger hailstones, especially when the membrane has aged. Modified bitumen systems may show crushed or displaced granules after a hailstorm, exposing the underlying material to UV damage. Built-up roofing systems can experience crushed insulation beneath the membrane, creating depressions that collect water.

It’s important to note that recovery rates vary among these materials. TPO membranes may show less visible damage initially but can develop problems months after a storm. EPDM tends to show damage immediately but may perform better long-term if properly maintained. Following a hailstorm, a professional flat roof inspection by qualified San Antonio roofing contractors can identify specific damage and recommend repairs based on your roofing system’s age and vulnerabilities.

Professional Inspection Protocols After a Hailstorm

When it comes to assessing flat roof hail damage, San Antonio roofing professionals follow a systematic approach. Certified inspectors begin with a comprehensive exterior examination, documenting all visible impact points, membrane disruptions, and displaced materials. They establish a grid pattern across the roof surface to ensure complete coverage, taking detailed photographs and measurements of each damaged area.

During flat roof inspections, professionals may use advanced technology that can detect problems invisible to the naked eye. Infrared thermography allows inspectors to identify subsurface moisture infiltration that often occurs after hail compromises TPO membranes or other flat roofing materials. Moisture meters help detect the extent of water penetration, while core sampling in selected areas can reveal damage to underlying insulation and deck materials that might otherwise go unnoticed until major problems develop.

Professional inspectors also assess secondary systems affected by hailstorms, including HVAC units, drainage structures, and rooftop penetrations. They evaluate whether the roof’s waterproof integrity remains intact and if its expected lifespan has been compromised. This thorough approach ensures all damaged areas requiring repair are found. Following manufacturer-specific protocols during the inspection also helps preserve warranty coverage for commercial flat roof systems.

How to Navigate Insurance Claims for Flat Roof Hail Damage

Successfully navigating the insurance claims process after your flat roof sustains hail damage requires preparation, documentation, and persistence. San Antonio property owners often face challenges when filing claims for flat roof hail damage because the damage patterns differ significantly from those on sloped residential roofs. Insurance adjusters may not always recognize subtle forms of damage that can compromise a flat roof’s integrity, such as membrane compression, microscopic punctures, or damage to the underlying substrate.

The key to a successful claim begins with proper documentation. Take date-stamped photographs immediately following the storm, documenting both the hail itself (if possible) and any visible roof damage. Maintain records of all previous roof maintenance and repairs to demonstrate your roof was in good condition before the storm. When working with insurance adjusters, request an adjuster familiar with commercial flat roofing systems, specifically the type installed on your property.

Remember that you have the right to request a re-inspection if you believe the adjuster overlooked legitimate damage. With thorough documentation and professional support, you can substantially improve your chances of receiving fair compensation for your flat roof hail damage repairs.

Repair vs. Replacement: Making the Right Decision

When flat roofs sustain hail damage in San Antonio, property owners face a crucial decision: repair the damaged sections or replace the entire roof. Several things influence this decision, including how old the roof is, the extent of damage, and the roofing material. If your roof membrane shows isolated punctures but the underlying insulation remains dry, targeted repairs may be sufficient. However, when hail damage affects more than 25% to 30% of the roof surface or has compromised multiple layers, complete replacement is often more economical in the long run.

The cost implications of this decision extend beyond immediate expenses. While partial repairs typically cost less upfront, they may lead to ongoing maintenance issues if the undamaged portions of your roof are nearing the end of their service life. Many San Antonio building owners find that when their flat roof has sustained significant hail damage and is over 70% through its expected lifespan, replacement offers better value despite the higher initial investment.

Insurance coverage also plays a role in this decision. Most policies cover replacement only when damage exceeds certain thresholds. Your insurance adjuster can help assess whether your flat roof’s hail damage meets these criteria. They can also explain how modern flat roofing materials with enhanced hail resistance might reduce future insurance premiums.

Preventative Measures and Future Protection Strategies

Taking steps to protect your flat roof from hail damage can save San Antonio property owners from high repair costs and headaches. Preventative measures are especially important in our region, where severe hailstorms are a recurring threat to commercial buildings. Strategic planning and regular maintenance can improve your flat roof’s resilience against even the most challenging weather conditions.

The material you select has a major role in hail protection. Modern TPO and EPDM membranes with higher mil thickness (60 or 80-mil vs. standard 45-mil) provide substantially better impact resistance. Many San Antonio commercial buildings benefit from installing protective overlays such as hail guards or sacrificial membranes designed to absorb impact damage while protecting the primary waterproofing layer. Some property owners opt for ballasted membrane systems where appropriate, as the stone ballast provides an additional defensive layer against hail.

Regular maintenance can significantly extend a flat roof’s lifespan in hail-prone areas. Quarterly inspections to identify and repair minor issues before they worsen should be standard practice. Clearing debris from drainage systems prevents water pooling that can worsen hail damage. It’s also recommended to document your roof’s condition with photos throughout the year, creating a baseline for comparison after storms. By combining high-quality materials with consistent maintenance, property owners can develop comprehensive protection strategies that minimize the impact of future hailstorms on their flat roofing systems.

Protect Your Roof from Hail Damage with BH Roofing 

If your property in San Antonio has been hit by a recent hailstorm, it’s important to fix any damage to your flat roof as soon as possible. At BH Roofing, we specialize in identifying and repairing flat roof hail damage to ensure your property remains safe and secure. Don’t wait for visible leaks or structural damage to become more severe.

Signs of hail damage can be subtle, but each impact can compromise the integrity of your roof. Whether you have a TPO, PVC, or modified bitumen roof, our team is equipped with the latest technology to assess and repair any damage caused by hail. We understand the specific challenges that flat roofs face during severe weather and are prepared to restore your roof to its former condition.

For a comprehensive inspection and consultation, call BH Roofing today at (210) 267-9029. Let us help you make the right decision between repair and replacement. Protect your investment with a professional team that stands by the quality of their work and understands the needs of San Antonio properties.