Class 4 Impact-Resistant Shingles: Are They Worth It After Regina's Hailstorms
After a hailstorm significant enough to generate thousands of insurance claims across Regina, it's a reasonable question: should your next roof be built to handle the next one better? Class 4 impact-resistant shingles are the most commonly recommended upgrade for hail-prone regions. Here's an honest, unbiased look at what that rating actually means, what independent testing has found, and whether it's worth considering for your home.
What Does "Class 4 Impact Resistant" Actually Mean?
The UL 2218 Testing Standard, Explained Simply
UL 2218 is a testing standard developed by Underwriters Laboratories, in collaboration with the insurance industry, to give a consistent way to measure how roofing materials handle hail-like impacts. Steel balls of increasing size are dropped from set heights onto a shingle sample, calibrated to match the kinetic energy a real hailstone of that size would carry. The sample is then examined for cracking or splitting.
How Class 4 Compares to Class 1 Through 3
| Rating | Steel Ball Size | Drop Height |
|---|---|---|
| Class 1 | 1.25 inches | Lowest |
| Class 2 | 1.50 inches | Moderate |
| Class 3 | 1.75 inches | Higher |
| Class 4 | 2.00 inches | 20 feet |
Class 4 is the highest available rating under this standard. To pass, a shingle must show no cracking through the material after impact, though some cosmetic denting is allowed.
Do Class 4 Shingles Actually Stop Hail Damage?
What Independent Testing Has Found
Here's where honesty matters more than marketing. The Insurance Institute for Business & Home Safety (IBHS), a research body funded by the insurance industry itself, conducted its own independent testing across a range of asphalt shingle products, including several with Class 4 UL 2218 ratings. Their finding: none of the tested products passed more than Class 2-level impacts without at least one test location failing.
This doesn't mean Class 4 shingles are ineffective. It means the rating reflects performance under a specific, controlled laboratory test, not an absolute guarantee against every real-world hailstorm. A 2-inch hailstone is a serious, damaging event regardless of your roofing material; Class 4 shingles are built to meaningfully outperform standard shingles, not to be indestructible.
Potential Benefits of Class 4 Shingles
- Increased durability against moderate hail impacts, generally outperforming standard architectural shingles at the same impact level
- Reduced granule loss from lower-intensity impacts, one of the earliest signs of shingle degradation
- Potential insurance premium discounts, though this varies significantly by insurer and is never guaranteed
- Resale consideration in a hail-prone market, where a documented upgrade can be a point of interest for buyers
Insurance Discounts: What's Actually True
Some sources describe insurance discounts for Class 4 roofing in certain US markets, but these figures come from US insurers and US regulatory contexts. Whether SGI or private Saskatchewan insurers offer a comparable discount, and at what level, is something you'd need to confirm directly with your insurance broker. The honest answer is to ask your specific insurer, not to assume a figure from an unrelated market applies here.
How to Document Your Class 4 Rating for Insurance and Resale
If you do install Class 4 shingles, keep the original product packaging or a photo of it, your contractor's invoice with the specific product name and model number listed, and a manufacturer's certification document or product data sheet confirming the UL 2218 Class 4 rating for that exact product. Without this documentation, a roof is treated as standard by most insurers and buyers, regardless of what was actually installed.
Myths vs. Facts About Impact-Resistant Shingles
Myth: Class 4 shingles are hail-proof.
Fact: They're impact-resistant, not impact-proof. Independent IBHS testing found even Class 4-rated products can fail under certain real-world impact conditions.
Myth: Every insurer offers the same discount for Class 4 roofing.
Fact: Discounts, where offered at all, vary by insurer, policy, and region. Confirm directly with your broker.
Myth: Any shingle marketed as "impact resistant" is UL 2218 Class 4 certified.
Fact: Only products that have actually passed independent UL testing carry a legitimate Class 4 certification. Ask your contractor for the specific product's certification documentation.
Is the Upgrade Right for Your Home?
Consider this upgrade if you're already planning a full roof replacement, you live in a neighbourhood that has experienced repeat hail events, such as Normanview West or Lakeview, or you want documented, verifiable durability for a future home sale. It may be less of a priority if your current roof is relatively new and undamaged, or you're doing a small repair rather than a full replacement, where matching a Class 4 product to existing shingles isn't practical.
Frequently Asked Questions
What does UL 2218 Class 4 actually test for?
It tests a roofing material's resistance to impact using steel balls dropped from calibrated heights, simulating hailstones of increasing size. Class 4 is the highest rating, using a 2-inch steel ball dropped from 20 feet.
Are Class 4 shingles completely hail-proof?
No. Independent testing by IBHS found that even Class 4-rated products can fail under certain impact conditions. They offer meaningfully better resistance than standard shingles, not a guarantee against all hail damage.
Will installing Class 4 shingles definitely lower my insurance premium?
Not necessarily. Discounts vary by insurer and are never guaranteed. Confirm directly with your broker or SGI for your specific policy.
How do I know if a quoted product is actually Class 4 certified?
Ask your contractor for the manufacturer's product data sheet or certification documentation confirming the specific product's UL 2218 rating. A general marketing claim of impact resistant isn't the same as verified certification.
Is it worth upgrading to Class 4 shingles during a repair, or only during a full replacement?
It's generally more practical during a full roof replacement, since matching a Class 4 product to existing undamaged shingles during a partial repair can be difficult.
Related Reading
How to File a Hail Damage Insurance Claim With SGI
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