What Curling Shingles Mean For Your Roof? (2024)

Homeownership comes with its fair share of joys—and challenges. One common issue that many homeowners face is curling shingles on their roof. These seemingly small roof issues can lead to significant problems if not addressed promptly.

This blog will explore:

• What causes shingle curling
• Why it’s a problem
• The steps you can take to repair it

What Are Curling Shingles?

Curling shingles occur when the edges of your roof shingles start to lift or curl, either upwards or downwards. This can make your roof look uneven and older than it is, and more importantly, compromise its ability to protect your home from the elements.

Different Types of Shingle Curling

There are two primary types of shingle curling:

Cupping:

• Description: The edges of the shingles turn upwards, forming a cup-like shape.
• Causes: Moisture buildup under the shingles, poor attic ventilation, or old age.

Clawing:

• Description: The center of the shingle rises while the edges stay flat, creating a claw-like appearance.
• Causes: Excessive heat, aging, and moisture.

Understanding the type of curling you’re dealing with can help in diagnosing the root cause and determining the best course of action for repair.

Why Do Shingles Curl?

Several factors can contribute to shingle curling, including:

Age

Over time, shingles naturally degrade and lose their flexibility. Asphalt shingles, for instance, can last anywhere from 15 to 30 years, depending on the quality and environmental conditions. As they age, they become brittle and more likely to curl.

Poor Ventilation

Proper attic ventilation is crucial for maintaining a healthy roof. Without adequate airflow, heat and moisture can build up under the shingles. This can accelerate their deterioration and cause them to curl.

Signs of Poor Ventilation

• Hot Attic: If your attic is extremely hot during summer, it’s a sign of poor ventilation.
• Ice Dams: Ice buildup on the edge of your roof in winter can indicate inadequate ventilation.
• Mold Growth: Moisture buildup can lead to mold growth in the attic.

Moisture

Moisture is a significant enemy of roofing materials. Water can seep into the shingles from above (rain, snow) or from below (condensation in the attic). When shingles absorb moisture, they can expand and contract, leading to curling.

Sources of Moisture

• Leaks: Roof leaks can allow water to penetrate the shingles.
• Condensation: Improper attic insulation can cause condensation to form on the underside of the roof.
• Poorly Installed Underlayment: If the underlayment (the layer beneath the shingles) is not installed correctly, it can allow moisture to seep through.

Improper Installation

Shingles must be installed correctly to function effectively. Common installation errors include:

• Incorrect Nailing: Nails placed improperly can cause shingles to become loose and curl.
• Insufficient Adhesive: Shingles require adequate adhesive to stay flat and secure.
• Overlapping Issues: Incorrect overlapping can expose shingles to wind and rain, leading to curling.

Low-Quality Materials

Cheap or low-quality shingles are more prone to curling. Investing in high-quality roofing materials can save you money and headaches in the long run.

Extreme Weather Conditions

Harsh weather, such as strong winds, heavy rain, snow, and extreme heat, can put a lot of stress on your roof shingles. Over time, this can cause them to curl.

The Consequences of Ignoring Curling Shingles

Ignoring curling shingles can lead to a host of problems, including:

• Water Damage: Curling shingles can create gaps that allow water to seep into your roof. This can lead to water damage in your attic, ceilings, and walls, potentially causing mold growth and structural damage.
• Reduced Energy Efficiency: A compromised roof can affect your home’s insulation, leading to higher heating and cooling costs. Properly sealed and flat shingles help maintain your home’s energy efficiency.
• Decreased Curb Appeal: Curling shingles can make your home look worn-out and neglected, reducing its curb appeal and potentially its value.
• Shortened Roof Lifespan: Addressing curling shingles promptly can extend the life of your roof. Ignoring the issue can speed up the need for a complete roof replacement.

How to Fix Curling Shingles: 5 Steps To Follow

Fixing curling shingles can range from simple DIY repairs to more extensive professional interventions. Here’s a step-by-step guide to help you address this issue:

Step 1: Inspect Your Roof

Before taking any action, conduct a thorough inspection of your roof. Look for signs of curling shingles, water damage, and other potential issues. Pay close attention to areas around chimneys, vents, and valleys, as these are common trouble spots.

Tools for Inspection

• Binoculars: For a preliminary view from the ground.
• Ladder: To get a closer look (ensure it’s stable and safe).
• Flashlight: To inspect the attic for signs of leaks or moisture.

Step 2: Improve Ventilation

If poor ventilation is contributing to the curling, take steps to improve airflow in your attic. This can involve:

• Installing Vents: Roof vents, soffit vents, and ridge vents can help improve airflow.
• Adding Insulation: Proper insulation can prevent condensation and moisture buildup.

Step 3: Repair or Replace Damaged Shingles

Depending on the severity of the curling, you may need to repair or replace the affected shingles.

🧰 Repairing Shingles

For minor curling:

1. Lift the Shingle: Carefully lift the curled edge using a pry bar.
2. Apply Roofing Cement: Apply a generous amount of roofing cement under the lifted edge.
3. Press Down: Press the shingle down firmly and hold it in place for a few minutes.
4. Secure with Nails (optional): If necessary, secure the shingle with roofing nails and cover the nails with roofing cement.

🔨 Replacing Shingles

For severely curled or damaged shingles:

• Remove the Damaged Shingle: Use a pry bar to lift the shingle above the damaged one. Remove the nails holding the damaged shingle in place. Slide the damaged shingle out.
• Install the New Shingle: Slide the new shingle into place. Secure it with roofing nails. Apply roofing cement to seal the edges.

Step 4: Address Moisture Issues

Identify and resolve any sources of moisture that may be affecting your shingles. This can involve:

• Fixing Leaks: Repair any roof leaks promptly.
• Improving Attic Insulation: Ensure your attic is properly insulated to prevent condensation.
• Checking Underlayment: Verify that the underlayment is correctly installed and in good condition.

Step 5: Regular Maintenance

Preventing shingle curling involves regular roof maintenance. Here are some tips:

• Clean Gutters: Ensure gutters are clear of debris to prevent water backup.
• Trim Overhanging Branches: Remove branches that could damage your roof in a storm.
• Inspect Annually: Conduct annual roof inspections to catch issues early.
• Hire Professionals: Consider hiring a roofing professional for a thorough inspection and maintenance.

When to Call a Professional

While some minor repairs can be done yourself, there are situations where calling a professional roofer is the best option:

• Extensive Damage: If a large area of your roof has curling shingles, professional intervention is necessary.
• Safety Concerns: Working on a roof can be dangerous. If you’re not comfortable, leave it to the professionals.
• Roof Replacement: If your roof is nearing the end of its lifespan and has widespread curling, it might be time for a complete replacement.

Certified Roofing Contractors for Your Roofing Shingles

Curling shingles are a common problem that can lead to significant damage if not addressed promptly. Regular maintenance is key to keeping your roof in good condition. And when in doubt, don’t hesitate to call a professional roofer. Your home is one of your most valuable assets—taking care of it is worth the investment.

If you have any questions or need further assistance, feel free to reach out to Roof Medic. We’re here to help you keep your home safe and secure!