Thermal splitting, also known as “tearing” or “cracking,” is a common issue in aging asphalt shingle roofs. This phenomenon occurs when temperature fluctuations cause shingles to expand and contract beyond their limits. Over time, this stress results in visible cracks or splits, particularly in older or lower-quality roofing materials. In Union, Missouri, and surrounding towns like Washington, Festus, and Eureka, thermal splitting shingle repair is a concern due to seasonal weather extremes.
Thermal splitting not only affects your roof’s appearance but also leads to moisture intrusion, energy inefficiency, and reduced lifespan of your roof. Recognizing the signs early can help homeowners take action before damage spreads.
Why Thermal Splitting Happens
There are several causes of thermal splitting in asphalt shingles, and each relates to material quality, installation practices, and environmental stress:
- Temperature Extremes: Missouri experiences hot summers and cold winters, which put significant thermal stress on shingles.
- Improper Fastening: If shingles are nailed too tightly or too loosely, they may not flex properly.
- Inferior Materials: Cheaper shingles with inadequate reinforcement are more prone to thermal splitting.
- Age of the Roof: As shingles degrade, they become more brittle and vulnerable to cracking.
By understanding these causes, homeowners can take preventive measures to reduce the risk of thermal splitting over time.
Signs of Thermal Splitting to Watch For
Spotting early indicators can make the difference between a minor repair and full roof replacement. Look for these signs:
- Straight or diagonal cracks along shingle surfaces
- Brittle or curling edges
- Moisture damage or mold under split areas
- Increased granule loss in gutters
If you notice any of these symptoms, it’s important to consult with a roofing professional who has experience in thermal splitting shingle repair.
The Consequences of Ignoring the Problem
Ignoring thermal splitting can lead to serious structural and financial issues:
- Water Damage: Split shingles allow rainwater to seep into your decking and underlayment.
- Mold Growth: Persistent moisture can trigger mold growth in attic spaces.
- Higher Utility Bills: Compromised insulation causes temperature imbalances in the home.
- Shortened Roof Life: What could have been a small repair now requires full replacement.
By addressing issues early through professional thermal splitting shingle repair, you can save significantly on long-term costs.
Recommended Repair Techniques
Emmendorfer Exteriors uses tested and approved strategies when addressing thermal splitting. Depending on the severity and extent of damage, the solutions may include:
Spot Repairs
For small areas of damage, the compromised shingles can be individually removed and replaced. This requires color-matched shingles to maintain a consistent appearance.
Underlayment Inspection and Replacement
In many cases, thermal splitting allows water to penetrate the underlayment. A thorough inspection of the layers below the shingles is essential to determine if additional repair is needed.
Flashing Upgrades
Improper or outdated flashing can contribute to splitting and leaks. We often recommend new flashing at valleys, vents, and edges as part of a broader thermal splitting shingle repair strategy.
Partial Roof Replacement
If damage is isolated to one section of the roof—often the sun-facing side—replacing just that area can be cost-effective and efficient.
Prevention Strategies Every Homeowner Should Know
While not every split can be prevented, the following maintenance and design tips can go a long way:
- Invest in High-Quality Shingles: Look for shingles with strong reinforcement layers designed for temperature resistance.
- Ensure Proper Installation: Always hire licensed roofing professionals who understand nail placement, spacing, and ventilation requirements.
- Routine Roof Inspections: An annual roof checkup, especially before winter, helps catch issues early.
- Ventilation Is Key: Proper attic ventilation balances indoor and outdoor temperatures, reducing thermal stress on the roof.
Homeowners in areas like Herculaneum, Gerald, and Valley Park benefit from proactive care, especially with homes exposed to fluctuating weather patterns.
The Role of Ventilation in Preventing Splitting
A major factor in preventing thermal splitting is having a well-ventilated attic. Heat buildup beneath the shingles causes excessive expansion and contraction. Emmendorfer Exteriors often includes attic evaluations in thermal splitting shingle repair services.
Installing ridge vents, soffit vents, or attic fans helps regulate airflow, keeping temperatures stable. This isn’t just a benefit for shingles—it also preserves your home’s insulation and wood framing.
Choosing the Right Contractor for Thermal Splitting Shingle Repair
Hiring the right roofing contractor is crucial. Here’s what to look for:
- Local Experience: Choose a roofer familiar with Missouri’s climate and its effects on roofs.
- Certifications: Ensure they’re certified by major shingle manufacturers.
- Warranty Options: A good contractor offers labor and material warranties.
- Inspection Services: Professionals should inspect not only the shingles but also decking, flashing, and ventilation systems.
Emmendorfer Exteriors is proud to serve Union and surrounding areas like Pevely and DeSoto, providing honest, detailed assessments and top-tier workmanship.
How Weather in Missouri Contributes to Shingle Splitting
Missouri’s combination of heavy snowfall, spring rainstorms, and intense heat creates the perfect conditions for thermal splitting. The continuous cycle of freezing and thawing stresses shingles beyond their flexibility range. Roofs without proper slope or drainage are at even higher risk.
This is why many homeowners in Festus and Fenton experience recurring roof issues if thermal splitting isn’t addressed properly. Professional roofers can recommend solutions like slope correction, upgraded materials, or enhanced insulation.
Should You Repair or Replace Your Roof?
It depends on the following factors:
- Age of the Roof: If your roof is near the end of its lifespan, full replacement may be more economical.
- Extent of Damage: Multiple areas of splitting across various planes suggest a systemic issue.
- Material Used: Some older shingle types are no longer supported or manufactured.
- Budget: Repairs are more affordable, but replacements offer long-term protection.
Emmendorfer Exteriors can provide a thorough evaluation and quote so you can make an informed decision.
Cost of Thermal Splitting Shingle Repair in Union, MO
While prices vary depending on materials and square footage, here’s a rough breakdown:
- Minor Spot Repair (per bundle): $200–$400
- Flashing and Underlayment Work: $500–$1,200
- Partial Roof Replacement: $3,000–$7,000
- Full Replacement: $8,000–$15,000+
We provide detailed, itemized estimates to homeowners in towns like St. Clair and Eureka to help them understand all costs involved.
Insurance and Warranty Considerations
Thermal splitting is sometimes covered by homeowner’s insurance if it results in interior water damage, but typically, wear-and-tear isn’t included. It’s important to:
- Document the issue with photos
- Get an inspection report from Emmendorfer Exteriors
- File a claim promptly after discovery
Additionally, check your roof’s material warranty to see if manufacturer defects are covered.
Real Results from Real Clients
In one Union home, Emmendorfer Exteriors successfully addressed severe thermal splitting across a 12-year-old roof. After a thorough inspection, we replaced compromised shingles, installed upgraded underlayment, and added ridge vents to prevent recurrence. The homeowner noticed a 30% drop in attic temperatures and hasn’t seen a single crack since.
When to Schedule a Repair
Schedule your inspection or thermal splitting shingle repair if:
- You’ve noticed leaks after storms
- Your shingles appear cracked, curled, or brittle
- Your roof is older than 10 years
- Your energy bills have unexpectedly risen
The best time to act is before the peak of summer or winter—giving your roof the best chance at survival during extreme temperatures.
Conclusion
Thermal splitting in asphalt shingles is a problem that homeowners in Union, Washington, Pevely, and nearby Missouri towns cannot afford to ignore. From early warning signs to full-blown roof leaks, addressing this issue requires prompt attention, professional service, and preventive care.
Emmendorfer Exteriors has extensive experience in thermal splitting shingle repair and offers complete roofing solutions that protect your home, enhance its value, and extend the life of your roofing system.
If you suspect thermal splitting or want to make sure your roof is prepared for the seasons ahead, contact Emmendorfer Exteriors today for a professional inspection. We’re your trusted local roofing partner across Missouri communities.
