Important Differences Between Standard Roofing Shingles and Impact Resistant Shingles
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Material Composition and Construction
After being a roofing contractor in Central Texas for many years, we've seen the difference impact resistant roofing can make. At the same time, we understand the cost effectiveness of standard asphalt roofing shingles, which is why they are the most common roofing material for residential properties.
So, are impact resistant shingles worth the additional cost? We're providing important details that help property owners determine if making the upgrade to impact resistant roofing shingles is the right move.
Some aspects of these two shingles are similar in the material composition, but the deviations make a significant difference.
Standard Asphalt Shingles
- Are made from a fiberglass mat coated with asphalt and mineral granules.
- Designed primarily for general weather protection (rain, sun, moderate wind).
- The asphalt is relatively brittle, especially in colder temps.
- Granules can dislodge more easily under impact.
Built For: everyday conditions, not repeated abuse.
Impact-Resistant (IR) Shingles
- Are asphalt-based, but reinforced with: polymer-modified asphalt, rubberized additives, SBS (styrene-butadiene-styrene) additives.
- These additives allow the shingles to flex and rebound when struck.
- Granules are embedded more securely into the asphalt.
Built For: Engineered to absorb an impact instead of cracking under it.
Hail Damage and Debris Impact
There aren't any local building codes in Central Texas that require impact resistant shingles even though there can be extreme weather conditions. But some homeowners install impact resistant roofing because of the shingle's ability to hold up much better during a storm so there's less hail damage.
Standard Shingles: Hail can cause cracking, granule loss, fractures that may not cause roof leaks immediately but shorten roof lifespan. Damage often worsens over time as UV exposure causes weakened areas.
Impact-Resistant Shingles: Designed to withstand hailstones up to 2 inches in diameter, depending on the rating. Shingles may dent slightly but typically don't crack or expose the mat. Dramatically reduces "functional damage" that leads to insurance claims.
UL 2218 Impact Ratings
Impact resistance ratings are one of the big divides between the different types of shingles. Impact-resistant shingles are tested using the UL 2218 rating system. A steel ball drop test is done by dropping steel balls of different sizes from varying heights to simulate hail. The testers then gauge how much damage was sustained to give the roofing a rating from 1-4.
| Rating | What It Means |
|---|---|
| Class 1–2 | Minor impact resistance |
| Class 3 | Resists moderate hail |
| Class 4 | Highest rating – resists severe hail |
Impact-resistant shingles usually have a Class 4 rating. Standard shingles are sometimes not UL 2218 rated at all.
Longevity and Roof Lifespan
Standard Shingles: Typical lifespan: 15–25 years. Hail damage can cut this short even without obvious roof leaks. More frequent roof repairs or early replacement.
Impact-Resistant Shingles: Typical lifespan: 25–40 years. Better resistance to hail, uplift from high winds, thermal cracking. Slower granule loss = longer UV protection.
Insurance and Cost Considerations
This is where standard shingles have a bit of an edge but only in the short-term. The initial cost of impact-resistant shingles is 15–30% more than standard shingles. However, the longevity of impact resistant shingles means that the long-term cost makes up for the higher upfront cost. When you factor in the need for more frequent roof repairs, the difference in cost is further reduced. Many home insurance companies offer discounts for Class 4 shingles since they hold up much better during severe weather events, which means superior protections with fewer claims and less costly repairs in hail zones. In Texas, some homeowners recoup the upgrade cost within a few years through insurance savings alone.
The Surprisingly Nominal Aesthetic Differences
There are a lot of differences between standard and impact resistant shingles, but the appearance is strikingly similar. Modern IR shingles come in: architectural shingle styles, wide color selections, dimensional profiles. Visually, most people can't tell the difference from traditional asphalt shingles once installed.
When to Use Each Type of Roofing Shingle
Standard Shingles Are Best If: You live in a low-hail region; budget is the top concern; roof replacement is expected within the next 10–15 years.
Impact-Resistant Shingles Are Best If: You're in hail-prone areas (Texas, Colorado, Oklahoma); you want long-term durability and fewer repairs; you plan to stay in the home long-term; you want potential insurance discounts.
| Feature | Standard Shingles | Impact-Resistant Shingles |
|---|---|---|
| Hail Resistance | Low | High |
| Flexibility | Brittle | Flexible |
| UL 2218 Rating | None | Class 3–4 |
| Lifespan | 15–25 yrs | 25–40 yrs |
| Insurance Discounts | No | Often yes |
| Cost | Lower | Higher upfront |
Want to know if you should upgrade to impact resistant asphalt shingles? Has your roof already sustained hail damage? If your property is located in Central Texas give LOA a call before your roofing project. We can provide a free inspection and estimate with roofing material recommendations.