Finding the best roofing contractor in Indianapolis starts with knowing what to ignore: the crew knocking on your door after a hailstorm, and the lowest […]
Quick answer: Polymer modified shingles beat standard oxidized asphalt shingles on impact resistance and lifespan. They contain a rubber-like polymer that keeps the shingle flexible, so it absorbs a hail strike instead of cracking. Many carry a Class 4 impact rating, the highest rating under the UL 2218 test, which qualifies for a homeowners insurance discount with many carriers. Oxidized asphalt shingles cost less upfront and remain the more common choice on Indianapolis homes.
Key Takeaways
- 3-tab asphalt shingles are typically wind-rated around 60 mph. Dimensional asphalt shingles are typically rated 110 to 130 mph.
- Polymer modified shingles use an SBS rubber compound blended into the asphalt, which keeps them flexible in cold weather.
- Class 4 is the highest impact rating under UL 2218. Many insurers discount premiums for a Class 4 roof.
- Polymer modified shingles look identical to standard architectural shingles from the ground.
- For central Indiana storm exposure, polymer modified is the stronger long-term buy. Dimensional asphalt is the acceptable floor.
What Are Oxidized Asphalt Shingles?
Oxidized asphalt shingles are the standard residential roofing shingle. They're built from a fiberglass or felt mat saturated with oxidized asphalt and topped with mineral granules. They're lightweight, widely available and the lowest-cost option on most roofing quotes.
Their weakness is aging. The surface granules wear off over time, which exposes the asphalt to UV. The shingle gets more brittle as it ages, so wind lift and cracking become more likely in the back half of its life.
What's the Difference Between 3-Tab and Dimensional Shingles?
3-tab shingles are a single flat layer. Dimensional shingles, also called architectural or laminated shingles, use two bonded layers, which adds thickness and wind resistance.
| 3-tab shingles | Dimensional shingles | |
|---|---|---|
| Construction | Single flat layer | Two bonded layers |
| Typical wind rating | Around 60 mph | 110 to 130 mph |
| Typical warranty | 20 to 25 years | 30 years or more |
| Appearance | Flat and uniform | Layered with visible depth |
| Relative cost | Lowest | Slightly above 3-tab |
The price gap between the two is usually small. The wind rating gap is not. If you're choosing asphalt, ask your contractor for dimensional.
What Are Polymer Modified Shingles?
Polymer modified shingles are asphalt shingles with a rubber-like polymer, commonly SBS, blended into the asphalt. The polymer changes how the shingle behaves under stress. Instead of cracking on impact, it flexes and absorbs the energy.
From the ground they look the same as standard architectural shingles. The difference shows up when hail hits.
What the polymer changes:
- Impact resistance improves, because the shingle deforms instead of fracturing
- Cold-weather flexibility improves, which matters through Indiana's freeze-thaw cycles
- UV resistance improves over the life of the roof
- Tearing and cracking drop, which means fewer repair calls between replacements
- Service life extends, with many products carrying lifetime limited warranties
What Is a Class 4 Impact Rating?
Class 4 is the highest impact resistance rating under UL 2218, the industry standard impact test. In the test, a steel ball is dropped on the shingle from a set height. A Class 4 shingle shows no cracking on the back side after repeated strikes at the same spot.
Many polymer modified shingles earn Class 4. Not all of them do. Ask for the rating in writing before you sign a contract.
Do Impact Resistant Shingles Lower Your Homeowners Insurance?
Often, yes. Many insurance carriers offer a premium discount for roofs with a Class 4 impact rating, because those roofs file fewer hail claims.
The discount amount varies by carrier, by policy and by state. Call your insurer, ask specifically about a Class 4 impact-resistant roof discount, and get the number before you choose a shingle. For some Indianapolis homeowners that discount covers a meaningful share of the upgrade cost over the life of the roof.
Polymer Modified vs Asphalt Shingles: Side by Side
| Oxidized asphalt | Polymer modified | |
|---|---|---|
| Upfront cost | Lower | Higher |
| Core material | Asphalt over a fiberglass or felt mat | Asphalt blended with SBS polymer |
| Impact resistance | Standard | High, often Class 4 |
| Behavior in cold | Stiffens and becomes brittle with age | Stays flexible |
| Typical lifespan | 20 to 30 years depending on grade | Longer, often lifetime limited warranty |
| Insurance discount | Not typically | Commonly available with Class 4 rating |
| Best fit | Budget-driven replacement | Real hail and wind exposure |
What Should You Check Before Choosing Shingles?
Four things narrow the list fast.
1. Your budget, including what insurance covers
If storm damage is being covered by your homeowners policy, the carrier pays for what your policy specifies. Any upgrade beyond that is your out-of-pocket difference. Tell your contractor your number early.
2. Your roof pitch
Steep or unusual roof lines limit what can be installed. Heavier materials aren't always workable. Your contractor checks this, but it explains why some products get ruled out before you ever see a price.
3. Your home's load limit
Every structure has a weight limit. Slate and clay tile are far heavier than asphalt. This matters more in Indiana winters, since snow accumulation adds load on top of the roofing material.
4. Your local weather
Central Indiana sees severe thunderstorms, hail and high wind. Freeze-thaw cycles work on the roof all winter. Those conditions should drive the decision more than appearance does.
Which Shingles Are Best for Indiana Weather?
For homes in central Indiana, polymer modified shingles with a Class 4 impact rating are the strongest choice. The region's hail and wind exposure is exactly the condition those shingles are engineered for, and the insurance discount offsets part of the cost.
If polymer modified doesn't fit the budget, dimensional asphalt shingles are the right minimum. Indy Roof & Restoration does not recommend 3-tab shingles for homes in this market, because a 60 mph wind rating is too low for the storms this area gets.
Frequently Asked Questions
What are polymer modified shingles?
Polymer modified shingles are asphalt shingles with a rubber-like polymer, usually SBS, blended into the asphalt. The polymer keeps the shingle flexible so it absorbs impact instead of cracking, and it improves UV and cold-weather performance.
Are polymer modified shingles worth the extra cost?
In hail-prone areas like central Indiana, usually yes. They resist impact damage better than standard asphalt, and a Class 4 rating often qualifies for a homeowners insurance discount that offsets part of the upfront price.
What's the difference between 3-tab and dimensional shingles?
3-tab shingles are a single flat layer, typically wind-rated around 60 mph with a 20 to 25 year warranty. Dimensional shingles use two bonded layers, are commonly rated 110 to 130 mph, and usually carry a warranty of 30 years or more.
What is a Class 4 impact rating?
Class 4 is the highest impact resistance rating under the UL 2218 test. A Class 4 shingle shows no back-side cracking after repeated steel ball strikes at the same point.
Do impact resistant shingles lower your insurance?
Many carriers offer a premium discount for Class 4 impact-resistant roofs. The amount depends on your insurer and policy, so confirm it directly with your carrier before choosing a shingle.
How long do polymer modified shingles last?
Manufacturers commonly issue lifetime limited warranties on polymer modified shingles. Actual service life depends on installation quality, ventilation and storm exposure.
Which shingles are best for hail?
Shingles with a Class 4 impact rating under UL 2218. Polymer modified shingles are the most common product category that earns that rating.
Do polymer modified shingles look different from regular shingles?
No. From the ground they look like standard architectural shingles. The difference is in the material composition, not the appearance.
Roof Replacement in Indianapolis
Indy Roof & Restoration installs both shingle types on homes across the Indianapolis metro. We walk you through which one fits your roof, your exposure and your budget before you commit to anything. We handle storm damage claims regularly and work directly with insurance carriers, so you're not translating adjuster language on your own.
Contact our office to get started.
About the author: Aaron Christy is the owner of Indy Roof & Restoration in Indianapolis, Indiana. He has appeared on FOX59, WISH TV and RTV6 discussing storm damage and roofing for Indiana homeowners.
