Installing a new roof is a significant investment, and discovering that your new shingles aren't laying flat can be incredibly frustrating. This problem, while seemingly minor, can impact the roof's overall aesthetics, longevity, and weather resistance. This comprehensive guide will explore the common causes of this issue and provide practical solutions to help you get your roof looking its best.
Why Aren't My New Shingles Laying Flat?
Several factors can contribute to new shingles failing to lie perfectly flat. Let's delve into the most frequent culprits:
1. Improper Installation:
This is arguably the most common reason. Even experienced roofers can make mistakes, and incorrect installation techniques are a leading cause of shingle lifting. This includes:
- Incorrect nailing: Shingles need to be nailed securely, but not over-nailed. Too few nails can lead to lifting, while too many can damage the shingle and cause buckling. Nails should be driven straight and not at an angle.
- Insufficient sealant: Asphalt shingles rely on sealant to adhere properly. If not enough sealant is applied, or if the existing sealant is compromised, the shingles won't bond effectively.
- Skipping starter shingles: Starter shingles provide a crucial base for the rest of the shingle layers, ensuring even adhesion. Neglecting this step can cause problems further up the roof.
- Uneven substrate: If the underlying roof deck isn't smooth and level, shingles will naturally struggle to lie flat. Wavy decking can cause ripples and bumps in the shingles.
2. Temperature Fluctuations:
Asphalt shingles are sensitive to temperature changes. Extreme heat can cause them to expand, while cold temperatures can cause contraction. This expansion and contraction can sometimes lead to minor lifting or buckling, especially if the shingles weren't properly installed in the first place. This is often more noticeable in areas with significant seasonal temperature swings.
3. Defective Shingles:
While less common, it's possible to receive a batch of defective shingles. Manufacturing defects can cause shingles to curl, warp, or otherwise not lie flat. Inspect the shingles for obvious flaws before installation begins.
4. Wind Damage:
High winds, especially during or shortly after installation, can lift or damage shingles, preventing them from laying flat. Strong winds can also compromise the sealant, further exacerbating the problem.
5. Moisture Problems:
Moisture trapped under the shingles can cause them to lift as they try to dry out. This can be due to leaks in the underlayment or improper ventilation.
What Should I Do If My New Shingles Aren't Laying Flat?
The first step is to identify the cause. Carefully inspect your roof, paying close attention to the points discussed above. Consider taking photographs to document the issue and showing them to a roofing professional.
Once the cause is identified, the solution will depend on the root problem:
- Improper Installation: Contact the roofing contractor immediately. This is typically covered under warranty, and they should rectify the issue.
- Temperature Fluctuations: This is often a minor issue that resolves itself as the temperature stabilizes. However, if the problem persists, professional intervention may be needed.
- Defective Shingles: Contact the shingle manufacturer or supplier. They may offer replacements under warranty.
- Wind Damage: This often requires professional repair, as it might involve replacing damaged shingles or reinforcing the roof's structure.
- Moisture Problems: This could indicate a more serious issue, potentially involving leaks or ventilation problems that needs professional assessment.
How Can I Prevent Shingles From Not Laying Flat?
Preventing this issue from occurring in the first place is crucial. Here are some preventative measures:
- Choose a reputable roofing contractor: Research thoroughly and select a contractor with proven experience and positive reviews.
- Inspect shingles before installation: Check for any defects in the shingles before they are put on your roof.
- Ensure proper ventilation: Adequate attic ventilation is essential to prevent moisture buildup.
- Maintain your roof: Regularly inspect your roof for any signs of damage or wear and tear.
Addressing new shingles that aren't laying flat requires careful investigation and appropriate action. While minor issues might resolve themselves, significant problems necessitate professional intervention. By understanding the causes and employing preventative measures, you can ensure a long-lasting and aesthetically pleasing roof.
