Why Is Your Roof Wavy? Here's Everything You Need to Know

Why Is Your Roof Wavy? Here’s Everything You Need to Know

Why Is Your Roof Wavy? Here’s Everything You Need to Know 

Roofs can develop waves over time. The waves on the roof do not typically result in leaks,  but they can be architecturally undesirable and, on rare occasions, may point to a problem with the structure of the building.

Even though a wavy roof isn’t particularly aesthetically pleasing, many people worry about how it can impact performance. If your roof is wavy, you should first figure out what’s causing it.

Keep on reading to discover the top five causes of wavy roofs.

1. Poor Installation of the Roofing Material 

Poor roofing material installation is one of the most common causes of wavy roofs. This includes Incorrect nailing, inappropriate fastening, or using the wrong kind of nails.  Most of the time, this is due to the installer not following the manufacturer’s instructions.

Improper installation can lead to all sorts of problems, including leaks, drafts, and even structural damage. To avoid this problem, hire a reputable roofing contractor with experience installing the specific type of roofing material you’ve chosen.

2.  Framing Technique Is Not Well Done

When it comes to roofing, the framing technique is crucial. Incorrect roof framing can cause the roof to sag and deform over time. The frame is ineffective since the roof’s weight isn’t distributed. The roof may collapse, leading to severe injury or even death.

3. Warping or Shifting of the Roof Deck

The warping or shifting of the roof deck is one of the leading causes of wavy roofs. This may result from high temperature, house settlement, or shingle weight. Whatever the cause, this can lead to an unsightly and potentially dangerous situation.

4. Excess Moisture on the Roof 

Excess moisture on the roof is one of the leading causes of wavy roofs. When the roof is wet, it becomes soft and pliable, which can cause the roof to warp and become misshapen. In addition, excess moisture can also lead to the growth of mold and mildew, which can further damage the roof.

While there are many potential causes of excess moisture, one of the most common is improper ventilation.  If your home does not have proper ventilation, the moist air can cause the roof to warp. This can lead to severe problems, including leaks. In addition, the warping can cause the shingles to become loose and eventually fall off.

5. Poorly Repaired Felt Underlay

Felt underlay is a vital part of a roof which provides a barrier between the roofing materials and the rest of the house. It is also responsible for ensuring that water does not seep through the roof and cause damage to the interior of the home. When the felt underlay is repaired poorly, it can cause the roof to become wavy, and this can be a severe problem.


If you notice your roof is wavy, it is best to consult a professional to determine the cause and rectify the issue. An experienced roofer can assess the situation and recommend the best action to fix the problem.

Are you in need of reliable roofing contractors in Birmingham, AL? At 5 Star Roofer, we provide a comprehensive selection of roofing services, which include new installation, replacement, repair, and restoration of existing roofs. We are experienced in working with every conceivable roofing material and system, and we always make sure to use the highest-quality supplies and materials available. Work with us today!

Birmingham, AL

209 Oxmoor Circle
Birmingham, AL 35209

(205) 518-8433

Mobile, AL

601 Bel Air Blvd
Suite 209
Mobile, AL 36606

(251) 405-3553

Madison, AL

7169 US-72,
Suite A #102
Madison, AL 35758

(256) 210-1700

Franklin, TN

1550 W McEwen Dr.
Suite 300
Franklin, TN 37067

(615) 814-4550

Daphne, AL

6384 Bayfront Park Dr. Suite B
Daphne, AL 36526

(251) 405-3553
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