Because South Carolina has seen at least one tropical cyclone during 42 of the past 50 hurricane seasons, many homeowners in the Charleston area are taking a closer look at the materials going on their next roof.
Rather than installing the same material you’ve always had, you might be inclined to look for products that offer additional protection against severe weather. Impact-resistant shingles are one of the most common upgrades homeowners consider.
While they won’t make your roof hurricane-proof, they’re engineered to better withstand hail and wind-driven debris than standard asphalt shingles are. We’ll lay out everything you need to know about impact-resistant shingles below.
What Are Impact-Resistant Shingles?
Impact-resistant shingles are shingles that — as you’d probably guess — are built tougher than standard shingles. They’re made with reinforced materials that help them resist cracking or tearing when they’re hit by hail, falling branches, or wind-blown debris.
From the ground, you probably wouldn’t notice a difference. Most impact-resistant shingles have the same dimensional look as traditional architectural shingles and come in many of the same colors and styles.
The difference comes down to the way they’re built and how they perform during severe weather. Impact-resistant shingles often stand up to storms that leave lower-quality shingles dented or cracked.
That doesn’t mean they’re hurricane-proof, though. No roofing material is totally impervious to storm damage. Impact-resistant shingles are simply designed to reduce the likelihood of damage from impacts that might crack or puncture a regular shingle.
How Are Impact-Resistant Shingles Tested?
Fortunately, you don’t have to trust a manufacturer’s marketing claims when it comes to the durability of impact-resistant shingles, as many are independently tested and assigned an impact-resistance rating.
One of the most common standards is UL 2218. During this kind of testing, steel balls of increasing sizes are dropped onto the shingle to simulate the force of hail or falling debris.
After each drop, inspectors check for cracks or tears that could affect the shingle’s performance. Shingles get a Class 1 through Class 4 rating, with Class 4 indicating the highest level of impact resistance
Some manufacturers also use FM 4473 testing, which launches ice balls at the shingles to better mimic hailstorms.
Neither test guarantees a roof won’t be damaged during a hurricane, but they do give you a consistent way to compare products.
Impact Resistance vs. Wind Resistance
When you hear “impact resistance,” you might think wind resistance is a given, too. But while many roofing products do well in both areas, these metrics relate to different things.
Impact resistance tells you how well the shingle holds up after it’s struck by something like hail or a falling tree branch. Wind resistance tells you how well the shingles stay put when strong gusts whistle through.
Given that Charleston gets a good mix of both flying debris and wind in storms, both ratings deserve a closer look. Hurricane-force winds can tear shingles loose, while flying debris can crack or puncture the shingles that remain.
Choosing a roofing system that can handle both gives your roof better odds of weathering severe storms.
Why Homeowners Upgrade to Impact-Resistant Shingles
Impact-resistant shingles have a higher upfront cost than standard asphalt shingles, so it’s fair to ask whether they’re actually worth the upgrade. Here’s why homeowners often opt for these shingles over regular shingles:
Better Protection From Storm Debris
Hurricanes aren’t the only threat to a roof. Other tropical storms, strong thunderstorms, or even everyday summer weather can send branches, pine cones, and other debris careening onto your roof.
Impact-resistant shingles are built to better withstand those strikes, which can help reduce the chance of cracked or damaged shingles.
Fewer Repairs After Severe Weather
Not every storm causes major roof damage, but even a small crack can allow water to work its way beneath the shingles over time. Because impact-resistant shingles are less likely to crack after an impact, they may reduce the need for repairs after severe weather.
Potential Insurance Discounts
Some insurance companies offer discounts for homes with Class 4 impact-resistant shingles because they’re less likely to sustain damage from hail and other impacts. Every policy is different, though, so it’s worth checking with your insurance provider to see if your roof replacement could qualify.
Are Impact-Resistant Shingles Worth the Extra Cost?
It’s true — impact-resistant shingles do cost more than your standard architectural shingles.
But the difference in cost might not be as big as you expect. Whether that difference is worth it usually comes down to how long you plan to stay in your home and what kinds of weather your home is likely to face.
And for many homeowners in Charleston, the added durability is enough to justify the higher price.
A roof that’s less likely to crack after bouncing a few hailstones off it may require fewer repairs over its lifetime. Some homeowners also qualify for insurance discounts, which can help offset part of that initial cost.
If your roof is ready to retire, it’s worth comparing both impact-resistant and standard shingles before making a decision, especially since looking at the price alone won’t tell you the whole story.
Choosing the Right Roofing System Matters Just as Much
Impact-resistant shingles are only one part of the roofing system. The underlayment, flashing, roof decking, ventilation, and installation are huge contributors to how well a roof performs during severe weather.
A Class 4 shingle installed on a poorly built roofing system won’t deliver the same level of protection as one installed with careful attention to every layer beneath it. That’s why roof replacements should focus on the whole system rather than just one part of it.
Frequently Asked Questions
Many homeowners have questions about impact-resistant shingles and the way Charleston’s weather can impact their roof. Here are a few of the most common questions our clients have.
Are impact-resistant shingles hurricane-proof?
No. Impact-resistant shingles are made to hold up better when they’re hit by hail or wind-blown debris, but they’re not invincible. A major hurricane can still damage any roof, especially if large trees fall or extreme winds compromise the roofing system.
How long do impact-resistant shingles last?
Most impact-resistant shingles have a lifespan that’s comparable to the standard architectural shingle. Many can last 30 years or more, depending on the product, installation quality, and the weather your roof experiences over time.
Will impact-resistant shingles lower my homeowners’ insurance premium?
Possibly. Some insurance companies offer discounts for homes with Class 4 impact-resistant shingles because they’re less likely to be damaged by hail and other impacts. Every policy is different, though, so check yours for the specifics.
Can impact-resistant shingles be installed on any home?
Usually yes. If your home is a good candidate for a standard asphalt shingle roof, it’s probably a candidate for impact-resistant shingles as well. During a roof inspection, we can determine whether your roof needs any repairs or upgrades before installation.
Are impact-resistant shingles available in different colors and styles?
Yep! You don’t have to settle for an industrial or commercial look to get added protection. Most manufacturers offer impact-resistant shingles in a variety of colors and architectural styles, which makes it easy to find an option that complements your home.
Do impact-resistant shingles require more maintenance?
Nope! They require the same care as other asphalt shingle roofs. We still recommend having your roof inspected after severe storms and scheduling regular inspections to catch small problems before they become larger repairs.
Do impact-resistant shingles perform better in Charleston’s climate?
They can. Charleston’s hurricane season brings the possibility of wind-driven debris, while summer thunderstorms can send branches and other objects onto your roof. Impact-resistant shingles are built to withstand these impacts, so they’re a popular choice among homeowners looking for added peace of mind during storm season.
Find the Best Roofing Solution for Your Home
If your roof is closing in on the end of its lifespan, now is the perfect time to explore your options. Willow Ash Roofing is here to help you compare roofing materials and answer any questions you have along the way.
We’ve helped homeowners across Charleston protect their homes with quality roofing systems built for the Lowcountry. Contact us today to schedule an inspection or request an estimate.
Sources & References
- Insurance Institute for Business & Home Safety (IBHS) – Relative Impact Resistance of Asphalt Shingles
Examines how different asphalt shingles perform under impact testing, including comparisons between standard and impact-resistant products. The report discusses shingle construction, testing methods, and how impact resistance can influence roof performance during hail and debris events.
https://ibhs.org/wp-content/uploads/member_docs/Relative-Impact-Resistance-of-Asphalt-Shingles_IBHS.pdf - South Carolina Department of Natural Resources – South Carolina Hurricanes Executive Summary
Provides historical data on tropical cyclones affecting South Carolina, including hurricane frequency, storm tracks, and the state’s long-term hurricane risk. The report highlights that tropical cyclones have affected South Carolina during 42 of the past 50 years.
https://www.dnr.sc.gov/climate/sco/hurricanes/pdfs/SCHurricanesExecutiveSummary.pdf - Texas Tech University National Wind Institute – Standard Test Method for Freezer Ice Balls
Explains the development of freezer ice ball testing as a method for evaluating the impact resistance of roofing materials. The report outlines testing procedures designed to better replicate real-world hail impacts and compares them with traditional impact testing methods.
https://www.depts.ttu.edu/nwi/research/DebrisImpact/Reports/StandardTestMethodfor_FreezerIceBalls.pdf
