Asphalt shingles are one of the most widely used roofing materials across the country, and most of the time they last for decades with few problems. However, there is always a chance that the individual shingles will start to curl, curve, or develop a cup-like shape as time goes by.
It may be hard to notice in the beginning, but eventually you may notice the roof taking on a wavy or distorted look. When you do notice this form of damage, it's time for re-roofing. Before you get a new roof, however, it is important to figure out what caused the shingles to fail so you don't have a repeat performance from the new roofing.
Lack of Venting
Your roof involves more than just the layer of shingles you see on the surface. There's also a deck made of plywood or chipboard, and at least one layer of roofing felt or a similar underlayment.
These layers give the roof durability, but they can also trap moisture or heat. Both heat and moisture cause asphalt shingles to curl or cup. Venting the attic properly according to the latest building codes allows moisture to escape and lowers the temperature on the hottest summer days.
Improper attic venting shortens the lifespan of shingles. It also leads to higher energy bills, structural damage, and long-term problems like mold and mildew throughout your house. If incorrect venting seems to be the cause of your roof’s problems be sure to invest in a complete attic inspection and full improvements.
Inadequate Binder Coating
When you notice your shingles curling or cupping within months or the first few years after installation, it's likely a manufacturing fault of the shingles instead of something wrong with your roof. The most common reason that shingles will start curling so early is an inadequate amount of asphalt-based binder applied to the backing.
Asphalt shingles can be made with organic or fiberglass matting as the backing. Both materials are coated with asphalt to attach the granules and to make the material tougher and more resistant to UV damage. When the shingles are made with too little binder, the granules wash off easily and the backing starts to crumple up and curl.
You'll need to make a claim with the manufacturer if you suspect this is the reason your roof is damaged. The manufacturer will want to inspect the roof to rule out any other potential causes before they will agree to pay for re-roofing or repairs.
How the shingles are handled before they're installed on your roof can play a big role in how they act after installation. Bundles of shingles that get saturated by rain or overheated by direct sun exposure weaken the shingles so they begin to curl and cup after only a decade or less.
You may be able to file a claim against the installer's warranty if you can prove that poor storage is the cause of a roof that fails earlier than expected. When you have roof work done, be sure to keep a record of who installs the roof and what materials they use so you can get the manufacturer’s help if the shingles fail.
Wrong Shingle Type
Asphalt shingles are designed to handle extremes in either cold or heat, but usually not both. Installing heat-tolerant shingles in a cold climate results in curling, and the opposite is also true.
Most homeowners don't get a chance to inspect their shingles personally to determine if they're the right type. If you want to work with a roofing company that you can trust to use the right products, choose Select Exteriors . We can handle the repairs or re-roofing process after solving the underlying cause of the original damage to your roof so that you can feel confident in your roof.