Hard to tell from one photo but if the buckling followed the pattern of joints in the roof sheathing it can be caused by installing shingles over sheathing before it has had time to reach moisture equilibrium with the homesite environment.
New roof buckling shingles.
But the moisture evaporates as the materials reach equilibrium with the the surrounding air and the shingles settle back down flat.
There could also be a possibility that the roof is defective.
Depending on the size of the area to be fixed you may elect to replace all the shingles for symmetry and appearance.
Use an asphalt saturated felt shingle underlayment to cover the decking materials before applying the shingles.
Another cause of buckling can be wetting of the felt paper which will expand if it gets wet.
This sheathing is generally made from plywood or a similar material.
It is caused as a result of the movement of the wood roofing deck or wrinkling of the underlayment.
If the felt paper is rained on it s best to let it dry out before installing shingles.
Asphalt shingles sometimes buckle slightly and in an irregular pattern due to moisture in a the materials of a new roofing system.
Make sure to apply shingles in accordance with the shingle manufacturer s recommendations.
In new construction it is best to let the roof sheathing acclimate to local conditions before installing the roofing although this is not always practical.
Then replace the area with new shingles.
Under your shingles there is a layer called the roof sheathing.
Moisture in underlayment and roof decking.
Shingles that are curled or buckling are another sign that you may need a new roof.
Buckling shingles can sometimes be traced back to mistakes made during roof installation even though the buckling may not show up for a year or two after you get a new roof.
Shingle buckling is one of those awful things that can happen to a roof through no fault of anyone.
Cut out plywood felt or underlayment that is causing the buckle.
This then telegraphs to the shingles above.
This is what we call buckling.
Out of all the causes of buckling shingles the most common and the most damaging reason.
Only use wood decking materials that are at moisture equilibrium with the local environment.
Why does your roof have buckling shingles.
You may have curling or buckling shingles for a number of reasons but the.
The wetness gets absorbed by the felt underlayment causing the felt to wrinkle.
And this is a serious problem because if minor buckling is not addressed it could require a full roof replacement.