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Curling Shingles? Know Why It Is Happening

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Many homeowners love asphalt shingles because they are durable, affordable and perform great with various kinds of weather. Asphalt shingles are not impervious to damage, since they are prone to curling under certain conditions. Here is why your asphalt shingles could be curling.

Water Related Damage

It is possible that water got underneath the asphalt shingles on your roof, which will leave behind moisture that can cause shingles to warp. You won't notice the warping at first, but you will definitely see it when the shingles begin to curl.

Curling shingles raises the questions of how water got under the shingles to begin with. For homes in a colder climate, ice dams could be responsible for getting moisture underneath your shingles. Ice dams are caused by a hot portion of the roof with poor insulation that melts any snow above it. The water runs down the roof, freezes once it gets cold again and expand underneath your shingles.

You'll need a roofing contractor to investigate the true cause of ice dams. The solutions could involve more work than just adding insulation, since poor ventilation could also be responsible. The goal will be to eliminate the hot spots so that snow won't melt in the winter.

Improper Installation

While most issues with shingle curling will happen over the years, a poor installation can cause shingles to curl not too long after your shingles have been installed. Curling can occur due to shingles that have been nailed down too tight. Curling can also occur from installing shingles over old ones, or incorrectly installing the singles by placing them in vertical rows.

An improper installation an be corrected. The recommendation will be to spot fix the problem by replacing specific shingles that are curling. This may fix the issues with shingles that were nailed down too tightly. Keep in mind that other situations could require the entire roof to be removed. This is common when a new roof was incorrectly installed over an old roof, which may require the old roof to be ripped out to start over from scratch.

Aging Shingles

Shingles do eventually get old and need replacement. Curling is one way that they show their age. With asphalt shingles having a lifespan between 15 and 25 years, curling shingles may be something you have to deal with while living in your home.

Go to or speak with a local roofing contractor for more info on curling shingles.