Curled Asphalt Shingles - Identifying and Repairing Them
If you have an asphalt shingle roof with shingles that appear to be curling up around the edges, then you may be concerned about having to invest in a new roof. This is wise if your roof is 15 to 20 years old. If your roof is not nearly this old though, then you may be able to attend to the curled shingles individually. Keep reading to learn how to inspect the shingles to identify a repairable issue and also about shingle repair.
How to Identify a Fixable Curling Issue
Sometimes asphalt shingles will curl as they age, and the natural aging process indicates that the shingles will likely need to be replaced. These aged shingles have succumbed to thermal degradation, water damage, and wind damage. There are several signs of this type of damage. If you notice cracks around the curled sections of the shingles, then this is an indication of thermal cracking. Thermal energy from the sun causes the petroleum inside the shingle mat to evaporate. The shingles then dry out and cracks develop. As the sun's rays continue to beat down on the roof, the edges of the shingles dry even more, and they start to curl up. New petroleum cannot be added to the shingles, so they need to be replaced.
Extensive water damage can be noted when the shingles seem to puff up. As the water is absorbed more and more into the mat, the shingle starts to pull apart. The edges start to curl when this happens.
Wind damage is often seen when the small granules that line the top surfaces of the shingles start to come off. This leaves the shingles unprotected and then the sun can damage the shingles and cause thermal degradation. If you notice the granules coming off from the shingles well before they curl, then this is likely the problem that you are experiencing.
While there are several signs that your shingles do need to be replaced completely, there are also some that indicate that the shingles can be repaired and replaced at a later date. If the shingles have just started to curl and you have little ventilation in your attic, then the hot and moist air from the attic space has likely risen and been absorbed by the shingles. The water that accumulates underneath the shingles can cause the curling.
How to Repair Fixable Shingles
If you believe that your shingles have curled due to a moist attic problem, then you can repair your roof. You can also do this if only a few of your shingles have started to curl. In other words, if the problem is just starting, then you can prolong a roofing replacement by focusing on the shingles that have started to show signs of wear and tear.
To resolve the curling issue caused by moisture, you should have vents placed in your roof or along the eaves. A roofing professional can assist you with this. If you do not want to hire a professional right away, then you can add a dehumidifier to the attic to remove water from the air. Also, a fan can help with air circulation so moisture is less likely to move through the roof deck.
Once the moist air situation is addressed, you should adhere the curled edges of the roof to the deck. You can do this for shingles that have aged and started to curl as well. Purchase a tube of roofing cement and place it in a caulk gun. Add a dab of the cement to the underside of each curl and press the curled shingle section down against the roof. If shingles are stubborn and do not want to stick down, then use a brick or other weight to hold the cemented shingle down until the material cures in about one day.