Any time of year you may notice buckling shingles on your roof. What is that? Buckling shingles look like something is underneath the shingles pushing them upward. You also may have curling shingles, where the center of the shingle is sunken and the edges turn up. Both issues are noticeable from ground level and if you notice this problem, I recommend you contact a good roofer.
What causes these issues?
You may have curling or buckling shingles for a number of reasons, but the usual culprit is moisture. Moisture is damaging to a roofing system. If you had a roof replacement recently but kept the same roof decking, the wood may have absorbed moisture before the new roof was installed. Moisture can make the decking move and cause the shingles to buckle.
The underlayment also could have absorbed moisture. This could make the underlayment wrinkle and push the shingles upward. Both issues require the attention of a professional and repair may involve replacing damaged shingles and wrinkled parts of the underlayment.
Out of all the causes of buckling shingles, the most common and the most damaging reason is not enough ventilation in the attic. Hot air and condensation build up in the attic and make the shingles curl or buckle away from their proper place on the roof.
While curling or buckling shingles may be the result of an attic ventilation problem, a lack of proper airflow affects more than just the shingles.
In the winter, an attic without enough ventilation can lead to ice dams. Hot air that escapes from your home rises to the attic and becomes trapped. It heats up the roof and causes snow and ice to melt, only to have the water refreeze on the eaves. This causes a backup of moisture that can rot your roof deck and create the perfect environment for mold to grow in your attic.
In the summer, an overly hot attic makes your air conditioner work harder than ever to cool down your home. This causes the A/C to wear out faster than it should, and makes your cooling bills higher.
On top of these issues, attic ventilation that is having issues means your roof will degrade faster than normal. The buckling and curling make it so the asphalt shingles don’t protect your home from precipitation like they should.
For all your roofing needs, please contact my team at Class Eh! Roofing and we can help you get to the bottom of any problems for a dry and comfortable home!
Wayne Jeffreys is a native of Niagara-On-The-Lake and owner of Niagara based roofing company Class Eh Roofing!