Asphalt shingles have become popular roofing materials due to the relatively low cost, light weight, and durability of the material. Asphalt shingles stand up fairly well against the elements but, like any type of roofing, can start to experience damage over time. If you notice that a lot of your shingles have started to curl up at the edges, there might be signs of a bigger problem.

What are a few of the potential reasons your asphalt shingles have started to curl?

Water Damage

Water that gets under asphalt shingles can start to cause moisture damage that can warp the shingle. The warping can take on the form of curling. How can water get under the asphalt shingles?

Improper installation is one possibility. If you live in a region with cold winters, ice dams are another possible explanation. Ice dams form when uneven ventilation in the roof causes one section of snow to melt, run down the roof, and then freeze into place when the water reaches a colder part of the roof. The running water and sitting ice can both cause water damage both by getting under the shingle and by warping the top of the shingle.

If you suspect ice dams are a problem on your roof, call in a roofing services company for help. The roofers can evaluate your existing roof ventilation and make adjustments to ensure that the roof is ventilating as evenly as possible.

Improper Installation

Water damage isn't the only potential hazard of improper installation. Shingles that are nailed down too tightly, put over old shingles, or installed in vertical lines by lifting up the previously placed shingles can all create an environment for warped asphalt shingles.

What are some signs that it's an installation issue? If the curling appears virtually all at once not long after your roof was installed, the problem is likely the installation. You should also suspect installation if the curling happens to shingles that are in a single vertical or horizontal line, especially if you live in an area where ice dams aren't probable.

Call a reputable roofing company for an evaluation of your shingle installation. The company might recommend tearing off the entire roof and starting again or might be able to fix the problem with some spot removals and replacements.

Old Shingles

Roofing materials are not indestructible. Time and weather will make even the most expensive roofing materials show wear over time. Asphalt shingles are near the lower cost end of the spectrum and are thus a bit less long-lasting than materials like slate or clay tile. If your asphalt shingles are starting to near the end of their natural life, the shingles can start to curl.

The exact lifespan of asphalt shingles can vary widely due to the style of shingle, the weather in your area, and how diligent you were with maintenance. If you suspect that your shingles have gotten too old, or don't have any idea about the age of your roof, you should call in a roofing services company for an inspection.