Curled shingles are a common sign that your roof's seen better days. You know it's time to have your roof replaced once your shingles begin to curl, but you're probably wondering why it happens in the first place. The following dives into four common reasons why asphalt shingles curl up as they age. Armed with this information, you'll be better able to make smart decisions about your home's roofing needs.
The key to a long-lasting roof that can withstand the test of time is proper installation. Without it, it'd be much more difficult for your roof to do its job of keeping your family and your home dry. Nevertheless, there are plenty of instances where improper installation has resulted in the premature failure of one or more shingles.
Some of the problems that are associated with improper shingle installation include:
- Using too few nails to adequately support the shingle without curling.
- Installing new shingles directly over a layer of old shingles.
- Not having the tar line (the adhesive strip for asphalt shingles) lined up properly.
These problems can eventually cause the affected shingles to curl up on themselves, starting with the outer edges of each shingle. In some cases, the nails used to secure the shingle can back out, causing shingle damage as well as leaving behind hazardous obstacles.
It's a good idea to have your roofer carefully go over your roof post-installation so you won't have to face a damaged roof after only a few years of use. To help prevent improper installation, make sure you're hiring professional roofing services.
Ventilation is also important for your roof regardless of which materials you use for your shingles. In the case of asphalt shingles, proper ventilation releases excess heat and moisture that would otherwise be trapped within your attic. Too much heat can cause your asphalt shingles to fade and curl prematurely, wrecking your roof in only a short amount of time.
As for moisture, too much of it can seep into the shingles themselves, making them softer and more susceptible to mold and algae growth. Too much moisture can also cause the shingle's adhesives to break down, allowing the shingles to curl up.
It's important to make sure your roof ventilation system is up to the task of keeping excess heat and moisture at bay. For instance, you can use powered exhaust fans to help move more hot, moisture-laden air out of the attic before it takes a toll on your shingles.
General Wear and Tear
Time waits for no one, especially when it comes to the wear and tear experienced by your roof. Years of weathering rain storms, high winds, heavy snow and the occasional hail storm can easily take their toll on your asphalt shingles. The overhead sun can also bake your asphalt shingles, leaving them more prone to breakage than usual. At some point, your shingles will eventually be too worn to rely on.
Depending on the manufacturer and the region you live in, you can expect anywhere from 20 to 40 years of use from your asphalt shingles. Afterwards, it's best to replace every shingle on your roof to prevent leaks and other damage.
Most roofing material manufacturers strive to produce products that are of the highest possible quality with as few defects as possible. Nevertheless, problems in manufacturing can slip through the production line, resulting in asphalt shingles that are unsuitable for installation. Unfortunately, it can be difficult to spot defective shingles.
The good news is that many manufacturers offer warranties that cover a wide variety of manufacturing defects. You may need to send the shingles back if you have an unused shipment or at least provide proof of purchase or delivery.