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Wavy Asphalt Shingles: Brand New But Broken?

You've called up your roofer because the roof's condition is about to get worse later in the next five years. These certified roofers only use high-quality asphalt shingles from a renowned manufacturer. Their certification ensures you can make claims on any poor material and construction performance after installing your roof.

The roofer did a great job as you've expected from a certified roofing company. But, from the yard, the roof looks strange – it has a wavy pattern that you're aware it shouldn't have. It shouldn't have ripples because you've just used new roofing materials, not installed over an aged material or poor sheathing. To learn the issue behind it, you should ask your roofer about this occurrence.

In some instances, wavy asphalt shingles are normal after installation. The materials haven't properly set in because of the local temperature. It should look flat within a few days.

When it remains wavy and abnormal-looking after a week, you can call your roofer to examine its cause. Often, the roof material isn't to blame. Sheathing, trusses, nailing, and other factors also come into play. 

If you'd like to learn more about wavy asphalt shingle causes and how to fix them, you can refer to Archer Roofing's post below.

Although the underlying cause is usually excess moisture under the shingles, there are several factors that add to the severity of wavy shingles, including:

  • Faulty nailing, where shingles are nailed too tightly together, causing them to buckle, popping up.
  • Use of low quality underlayment, such as tar paper that was wrinkled during roof installation or shifts and moves around under the shingles.
  • Poorly installed decking, which was installed with inadequate spacing between panels, or the plywood was too thin and comes loose and shifts over time.
  • Shifting plywood on the deck due to high moisture levels under the shingles. This deck movement forces the felt and shingles to shift as well due to everything being interconnected by the roofing nails embedded throughout. As a result, the shingles move closer or further apart, causing unsightly buckling in the process.

As can be seen, most of the causes of shingle buckling are excess humidity—which needs to be eliminated first by improving attic ventilation by a qualified roofing company. (Continue reading here to learn more)

You can always count on Slavin Home Improvements for top-notch roofing services in your local area. With our decades of experience and knowledge, we ensure only the best results for all your needs. Contact us today.



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