Materials guide
Are Impact-Resistant shingles worth it on a Memphis roof?
What the Class 4 rating means, where these shingles help, and the questions to ask before you pay extra.
By Cora Padgett, Roofing Guides Editor Updated October 2026
We answer 24/7 across Memphis and Shelby County
Quick answer
Impact-resistant shingles carry a Class 4 rating under the UL 2218 test, the top rating for withstanding steel balls dropped onto the shingle. On a Memphis roof they make the most sense where hail is a repeat problem, when a replacement is already due, and when your insurer offers a discount. They resist damage; they are not hail-proof.
What class 4 actually means
Impact ratings come from the UL 2218 test, which drops steel balls of increasing size onto installed shingles and then checks the back of each one for cracks. A Class 4 rating, the highest, means the shingle survived the largest ball, two inches across, without cracking through. Many manufacturers make a Class 4 version of their architectural shingle, usually built with a rubberized asphalt or a reinforced mat that flexes on impact instead of fracturing.
The rating is a lab result on new material. It tells you the shingle resists cracking from a hard, round impact. It does not promise the roof will look untouched after a large hailstorm, and cosmetic marks in the granules can still happen.
Where they help on a Memphis roof
- Repeat hail. If your roof has been replaced or claimed for hail before, a tougher shingle can stretch the time between replacements.
- Wind. Many Class 4 shingles also carry high wind ratings, which matters in the lines of storms that cross the Mid-South each spring and summer.
- Long ownership. The extra cost spreads over more years if you plan to stay in the house.
- Insurance terms. Some insurers offer a premium discount for a Class 4 roof. Ask yours, in writing, before you buy.
They help less on a house you plan to sell soon, on a roof shaded by big trees where limb damage is the larger risk, or where the budget only stretches to a standard replacement done well. A properly installed standard architectural shingle still beats a Class 4 shingle installed badly.
Thinking about a class 4 roof?
We will show you how your current roof has held up and price standard and impact-resistant options side by side.
Call (901) 459-6395Impact-Resistant or standard architectural?
| Class 4 impact-resistant | Standard architectural | |
|---|---|---|
| Hail resistance | Highest UL 2218 rating | Varies, often lower |
| Price | Higher material cost | Lower |
| Look | Same profiles and colors in most lines | Widest choice |
| Insurance | May qualify for a discount | No impact discount |
The price gap varies by brand and product line, so compare written quotes for the same roof in both materials. Installation is the same work, so most of the difference sits in the material itself.
Questions to ask before you pay extra
- Does the exact shingle line carry a Class 4 rating under UL 2218, and can you show the listing?
- Will my insurer give a discount, and what proof does it want after installation?
- Does the warranty treat hail damage differently from other defects?
- Are the starter strips, hip and ridge caps rated to match the field shingles?
Ask the insurer what it needs as proof before the roof goes on. Some want the product listing and an installation certificate, and those are easier to collect on install day than months later.
How they are installed
Class 4 shingles go on the same way as standard architectural shingles: tear-off, decking repairs, underlayment, flashing and nailing to the manufacturer's pattern. The rating only means something if the whole system is installed to the manufacturer's instructions, so we use the matching starter, hip and ridge products and photograph the install for your records.
FAQ
Impact-Resistant shingle questions
No. They resist cracking from hail far better than many standard shingles, but very large hail can still damage them.
Most lines come in the same profiles and colors as standard architectural shingles, so they look the same from the street.
Some insurers offer a discount and some do not. Ask yours before you buy and find out what proof it needs.
Not usefully. The rating and any discount apply to a complete roof, so they go on as a full replacement.
The labor is about the same; the difference is mostly the material. Compare written quotes for the same roof in both.
Many metal panels carry impact ratings, though hail can still dent them cosmetically. We compare both if you are weighing metal.