When installing a new roof, you expect to see smooth and evenly laid shingles. However, it’s fairly common to encounter the problem of new roof shingles not laying flat. If this issue isn’t addressed promptly, it can lead to water leaks, reduced roof lifespan, and even costly repairs. This guide dives into the possible causes of this problem and offers practical solutions to ensure your roof shingles stay in top condition.
Why Do New Roof Shingles Not Lay Flat?
There are several reasons why new roof shingles may not lay flat. Some of these issues stem from installation errors, while others are related to the shingles themselves or the weather conditions. Below, we’ll discuss the main causes of this problem.
1. Settling Period for New Shingles
Believe it or not, it’s entirely normal for new roof shingles not to lay flat immediately after installation. Shingles often take time to conform to the roof’s surface. Factors like temperature and sunlight play a significant role in how quickly they settle. Typically, asphalt shingles flatten naturally after a few days to a few weeks, provided the weather conditions are warm enough.
2. Improper Installation
Incorrect installation of roof shingles is a leading cause of unevenness. If roofing nails are improperly placed or not driven in firmly, the shingles may lift or buckle. Additionally, if the shingles are not laid in a straight line, some sections might overlap unevenly, creating visible bumps and ridges.
3. Moisture Trapped Underneath
Moisture trapped within the roof decking or underlayment is another common reason for new roof shingles not laying flat. When moisture seeps in, it can cause the underlayment or the decking to swell, leading to uneven surfaces where the shingles are installed.
4. Warped Roof Deck
The roof’s surface, or decking, serves as the foundation for shingles. If the decking is warped or damaged, shingles will struggle to lay flat. This might occur due to old wood, rotting materials, or structural issues.
5. Weather Conditions
Weather conditions during and after the installation process can significantly affect how well shingles lay flat. For instance:
- Cold weather can make shingles stiff and difficult to work with, preventing them from laying flat.
- Excessive heat can cause shingles to expand improperly, leading to bulges.
- Wind can also lift newly installed shingles, particularly if they haven’t been nailed down securely.
6. Poor Quality Shingles
Using low-quality or damaged shingles can lead to significant issues. Inferior shingles are less flexible and often harder to install evenly. Even if they are installed carefully, they may not settle into place properly, leaving the roof uneven.
7. Overlapping Issues
Improper overlap of shingles during installation can cause a cascade of unevenness across the roof. This occurs when inadequate spacing is maintained or when shingles are not aligned according to manufacturer specifications.
How to Fix New Roof Shingles That Aren’t Laying Flat
If you’re dealing with new roof shingles not laying flat, there’s no need to panic. Depending on the cause, here are some effective solutions:
1. Give It Time
Sometimes, shingles just need time to settle. If the roof has recently been installed, allow a settling period of about one to two weeks. Warmer temperatures and direct sunlight often work wonders in helping shingles conform to the roof’s surface.
2. Inspect the Roof Decking
If the problem persists, check the condition of the roof decking. Have a professional roofer inspect for signs of rot, warping, or moisture damage. Replacing or repairing the affected areas of the decking is necessary for the shingles to lay flat properly.
3. Address Moisture Issues
To resolve moisture-related problems, ensure the attic or roof area is properly ventilated to prevent condensation. Use moisture barriers or waterproof underlayment during installation to block water infiltration. If water damage has occurred, repair or replace the underlayment before reinstalling the shingles.
4. Reinstall Problematic Shingles
If specific areas of the roof are problematic, you might need to remove and reinstall the affected shingles. This includes ensuring proper alignment, adequate nailing, and correct overlapping. It’s always best to hire a professional roofer for this task.
5. Roll Out Uneven Shingles
For minor inconsistencies, using a roofing roller can help flatten uneven shingles. This technique works well when the shingles are only slightly raised and don’t have underlying structural flaws.
6. Wait for Warm Weather
If the roof was installed during cooler months, the shingles might take longer to flatten. Warmer weather will naturally soften the shingles, allowing them to lay flat. You can speed up the process by gently warming problem areas with a heat gun, but avoid overheating to prevent damage.
7. Upgrade to Better Shingles
If low-quality shingles are causing persistent problems, consider upgrading to superior materials. Premium shingles are more durable, flexible, and easier to install. While it’s a higher upfront cost, it’s worth it for long-term roof performance.
When to Call a Professional Roofer
Although some fixes can be DIY-friendly, certain situations require the expertise of a professional. Call a roofer if:
- The problem persists after waiting for the settling period.
- There are signs of structural issues like warping or rotting decking.
- You’re unsure how to properly reinstall or fix uneven shingles.
- The roof shows signs of active damage, such as leaks or missing shingles.
A roofing professional can assess the root cause of the problem and recommend the best course of action to ensure long-term durability.
How to Prevent Shingles From Not Laying Flat
Prevention is always better than repair. Here are some tips to avoid the issue of new roof shingles not laying flat in the first place:
1. Use High-Quality Materials
Choose high-quality shingles with good flexibility and durability ratings. They’re easier to install and less likely to warp or buckle over time.
2. Hire Experienced Roofers
Partner with reliable and experienced roofers who follow best practices in installation. Ask for references or reviews before hiring to avoid common installation mistakes.
3. Ensure Proper Ventilation
A well-ventilated roof prevents excess heat and moisture buildup, reducing the risk of shingle warping. Consider installing vents or attic fans as part of your roofing system.
4. Install During Optimal Weather
Avoid roof installation during extreme weather conditions. Aim to schedule the work during mild weather when shingles are easier to handle and secure properly.
5. Maintain Regular Roof Inspections
Regular roof inspections can catch potential issues before they become major problems. Check the roof for uneven shingles, water damage, or signs of structural wear, especially after heavy storms.
Frequently Asked Questions
1. Can uneven shingles cause roof leaks?
Yes, uneven shingles leave gaps where water can seep through, increasing the risk of leaks and water damage.
2. How long does it take for new shingles to lay flat?
It typically takes one to two weeks for shingles to settle, depending on weather conditions and the type of shingles. Warmer temperatures speed up the process.
3. Are wavy shingles a sign of poor installation?
Not always. Wavy shingles right after installation can be normal due to settling. However, if they remain wavy after the settling period, it could indicate improper installation or underlying issues.
4. Can I fix uneven shingles myself?
Minor issues can often be fixed by re-nailing loose shingles or using a roofing roller. However, for larger problems, it’s best to consult a professional.
Final Thoughts
Dealing with new roof shingles not laying flat can be frustrating, but it’s a problem that can often be resolved with the right approach. The key is identifying the cause and taking steps to address it promptly. Whether it’s waiting for a settling period, fixing installation errors, or addressing structural issues, a well-maintained roof will ensure your home stays protected for years to come. When in doubt, don’t hesitate to reach out to a professional roofer to ensure the job is done right.
