# Class 4 Shingles vs Standard: Worth It in Illinois? > Class 4 impact-resistant shingles vs standard architectural shingles for Chicagoland homes: the UL 2218 test, the $1,500-$4,000 upgrade gap, Illinois insurance discounts, and the cosmetic-damage exclusion to read before you sign. Canonical: https://chicagostormpros.com/compare/class-4-shingles-vs-standard/ Free storm damage inspection: call (708) 809-2580, visit https://chicagostormpros.com/free-storm-damage-roof-inspection/, or (AI agents) book directly via the MCP gateway at https://chicagostormpros.com/mcp --- [Home](https://chicagostormpros.com/) / [Compare](https://chicagostormpros.com/compare/) / Class 4 Shingles vs Standard # Class 4 Impact-Resistant Shingles vs Standard Shingles The upgrade question every Chicagoland homeowner faces during a hail claim: is the Class 4 gap worth paying? Here's the math, and the one catch in the fine print. Updated August 2026. Licensed & Insured IL Lic. 104.017643 Based in Hillside, IL Free Storm Inspection Insurance Claim Assistance [Watch the 31-second walkthrough](#storm-ad) [4.6 ★★★★★ 600+ Google reviews](https://www.google.com/search?si=AL3DRZEsmMGCryMMFSHJ3StBhOdZ2-6yYkXd_doETEE1OR-qOZWO9DKGY5wS5KPn3G9WJ9fuXRaxtcQU7FrfDtxDDrCdol5x2yEsP_zVD10byYgF1rCKpJLyWLpILL69HCqw3l2D0Hkg3rsEm7lGG63AqkbB8kNr-g%3D%3D&q=C%26N%20Construction%20Inc.%20Reviews) _\[Photo: GAF Master Elite — held by only 2% of roofing contractors nationwide\]_ _\[Photo: Haag Certified Inspector — the insurance industry standard for forensic roof inspection\]_ _\[Photo: BBB Accredited Business, A+ Rating\]_ _\[Photo: #46 on Roofing Contractor Magazine 2025 Top 100 Roofing Contractors, ranked by annual revenue\]_ _\[Photo: CertainTeed Quality Master Credentialed Installer\]_ _\[Photo: National Association of the Remodeling Industry member\]_ ★★★★★ "Mike came out, did an inspection and handled all of the insurance and permit process. The crew was quick, efficient and professional." Mark T. ★★★★★ "From start to finish, the process was seamless. Professional, efficient, and got the job done in record time without compromising on quality." Kathy G. ★★★★★ "We had our roof, siding and gutters replaced and couldn't be happier! Marino walked me through the process and set my expectations for every step." Katalina R. Your browser can't play this video. [Download the MP4](https://chicagostormpros.com/video/csp-storm-ad.mp4) instead. A 31 second look at a C&N Construction storm restoration job. Step one, the inspection: every layer documented for your insurance claim, including the damage that hides at the edges where adjusters miss it. Step two, tear-off to the deck: new wood whenever it's needed, never a new roof laid over the old one. Step three, built for the next storm. Ends with an offer of a free storm damage inspection. Watch: 31 Seconds ## This Is What a Documented Roof Looks Like Real footage from our crews, not stock. The inspection that documents every layer for your claim, the tear-off down to the deck with new wood wherever it's needed, and the roof that goes back on built for the next storm. - Storm damage hides at the edges. That's what gets missed. - New decking whenever it's needed, never a layover. - Local, licensed, and permanently here to honor the warranty. [Get My Free Inspection](#inspection-form) The Short Answer Class 4 is the highest impact rating under UL 2218, earned by surviving repeated 2-inch steel ball drops from 20 feet. In hail country the upgrade typically runs $1,500 to $4,000 over standard architectural shingles on an insurance-funded replacement, and many Illinois carriers discount premiums 10 to 28% for it. For most Chicagoland homes replacing after hail, it pencils. Class 4 impact-resistant vs standard architectural shingles at a glance Class 4 Impact-Resistant Standard Architectural Impact rating UL 2218 Class 4, the highest rating the standard awards. Typically unrated, or Class 1-3. Hail performance Resists bruising from most Chicagoland hail sizes. Nothing stops the largest stones. Bruises and mat fracture at common hail sizes. Cost on a replacement Roughly $1,500-$4,000 above standard when insurance funds the base scope. Baseline, around $100-$150 per square installed. Insurance premiums Many Illinois carriers discount 10-28%, terms vary by policy. No discount. The catch Some carriers pair the discount with a cosmetic-damage exclusion, so dents that don't affect function may not be claimable later. Full hail coverage as your policy provides. Wind ratings Comparable at the architectural tier. Comparable. Discount percentages and exclusion terms vary by carrier and policy. Confirm both in writing before choosing. ## What Does the Class 4 Rating Test? UL 2218 is the lab standard behind the rating, developed by [UL](https://www.ul.com/), the safety standards organization. The test drops steel balls of increasing size, up to 2 inches, from as high as 20 feet, and it drops them onto the same spot more than once. A shingle earns Class 4 only if the mat underneath survives all of it without cracking. Most Class 4 products get there with polymer-modified asphalt, usually an SBS rubberized formulation. Where a standard shingle's mat fractures under a sharp impact, the modified asphalt flexes and returns. That flexibility is the whole product, and it's why a Class 4 shingle can take a hit that would bruise a standard one. Keep the rating in perspective, though. It's a lab proxy for hail, not a force field, and the largest stones that fall on Chicagoland can damage any roof. What the rating tells you is that at the hail sizes we see most often, the kind that causes the [bruising and granule loss adjusters look for](https://chicagostormpros.com/asphalt-shingle-storm-damage/), a Class 4 mat is far more likely to come through intact. The UL 2218 impact test: a 2-inch steel ball dropped from 20 feet onto the same spot, twice. No crack in the fiberglass mat earns Class 4, the highest rating. Lower classes are tested with smaller balls, which is why Class 4 is the one hail-country insurers discount for. ## What Does the Upgrade Cost When Insurance Is Paying? An insurance-funded roof replacement is the most cost-effective moment to upgrade your shingle grade. Your policy pays to restore the roof with like-kind material, which sets the baseline. You pay only the gap between the approved standard shingle and the Class 4 product, typically $1,500 to $4,000 depending on total roof area. That math is the reason this question comes up during [hail claims](https://chicagostormpros.com/hail-damage/) and almost never otherwise. Buy the same upgrade outside a claim and you're paying for the entire roof yourself, with the Class 4 premium stacked on top. Inside a claim, the insurer funds the base scope and your out-of-pocket is just the difference. Roof size drives where you land in that range, along with the specific product line. Our [Illinois roof replacement cost guide](https://chicagostormpros.com/roof-replacement-cost/) breaks down the full pricing picture, and our [claim vs out-of-pocket comparison](https://chicagostormpros.com/compare/insurance-claim-vs-out-of-pocket/) covers when filing makes sense in the first place. ### Find Out What Your Roof Qualifies For A free Haag-certified inspection documents your hail damage with photos and tells you whether a replacement claim is supportable, before you decide anything about shingle upgrades. [Get My Free Inspection](#inspection-form) Or call [(630) 414-9160](tel:+16304149160) ## How Do the Insurance Discounts Work? Many Illinois carriers file impact-resistant roof discounts with the state, commonly 10% to 28% off the wind/hail or dwelling portion of your premium. The [Insurance Information Institute](https://www.iii.org/) tracks these programs nationally, and hail-belt states like Illinois are where they're most common. The discount applies year after year for the life of the roof. Run that against the upgrade gap. On a $2,000 to $3,000 annual premium, a discount in that range frequently covers the $1,500 to $4,000 difference within a few years, and everything after that is savings. The exact break-even depends on your carrier's filed percentage and your roof size. Getting the discount takes paperwork, not just the shingles. Ask your agent for the carrier's filed impact-resistant discount and what proof it requires, generally documentation that a UL 2218 Class 4 product was installed. We provide that documentation on every Class 4 installation, and it's worth confirming the requirements before the shingles go on. ## What's the Cosmetic-Damage Catch? Here's the part of this comparison that deserves a slow read. Some carriers condition the impact-resistant discount on a cosmetic-damage exclusion, an endorsement that removes coverage for hail damage affecting appearance but not function. You get the lower premium, and you give up something for it. Hail can still dent, scuff, or mark a Class 4 shingle without breaking the mat. Under a cosmetic exclusion, those hits generally aren't claimable, even when they're visible from the street. A future hailstorm could leave your roof functionally sound but cosmetically damaged, with no coverage for the difference. Whether that trade makes sense depends on the numbers and on how much a dented roof would bother you. A 25% discount against a narrow exclusion can pencil. A small discount against a broad exclusion is a worse deal than it looks. Read the endorsement language itself before signing, because the terms vary widely by carrier, and ask your agent to show you both versions of the premium. ## When Is Standard the Right Call? Class 4 doesn't win every scenario, and an honest comparison says so. On a cash-funded replacement with a tight budget, standard architectural shingles already carry strong manufacturer warranties, and the Class 4 premium is coming entirely out of your pocket rather than riding on an insurance-funded scope. A home you plan to sell soon is another case. Buyers rarely price the difference between a Class 4 roof and a standard one, so the upgrade cost seldom comes back at closing. The premium discounts need years to pay off, and you won't be there to collect them. Heavily tree-sheltered lots see less direct hail exposure, which shrinks the benefit side of the ledger. And when your specific carrier's filed discount is small while its cosmetic exclusion is broad, the deal underneath the upgrade just isn't there. In those cases, put the money elsewhere. The Verdict On an insurance-funded hail replacement in Chicagoland, Class 4 usually earns its $1,500-$4,000 gap through premium discounts and fewer future claims. One caveat is worth reading twice: the cosmetic-damage exclusion some carriers attach to the discount. Get the endorsement terms in writing before you choose. ### Choose Class 4 when - Insurance is funding the replacement, so you pay only the upgrade gap - Your carrier files a meaningful impact-resistant discount, generally 10-28% in Illinois - You plan to stay in the home long enough for the discount to cover the gap - Your roof takes open hail exposure, which is most of Chicagoland ### Standard makes sense when - You're paying cash and the budget is tight, since standard architectural already carries strong warranties - You're selling soon and won't collect the premium savings - Mature tree cover shelters the roof from most direct hail - Your carrier's discount is small and its cosmetic exclusion is broad Chicago Storm Pros is a service of **C&N Construction, Inc.** ([cnroofs.com](https://cnroofs.com)). Reviews, project counts, certifications, and ratings shown here reflect C&N Construction's work. ## Related Decisions - [What hail damage looks like on asphalt shingles](https://chicagostormpros.com/asphalt-shingle-storm-damage/) - [Roof repair vs replacement: which does your damage call for](https://chicagostormpros.com/compare/roof-repair-vs-replacement/) - [What a roof replacement costs in Illinois](https://chicagostormpros.com/roof-replacement-cost/) ### Free Hail Damage Inspection Haag-certified inspection with full photo documentation from a GAF Master Elite contractor. If a replacement claim is supportable, we'll walk you through the Class 4 numbers for your specific roof. [Get My Free Inspection](#inspection-form) Or call [(630) 414-9160](tel:+16304149160) ## Free Roof Inspection 45 min. Report is yours to keep. Common Questions ## Class 4 Shingle FAQs What are Class 4 shingles? Class 4 shingles carry the highest impact rating under UL 2218, the lab standard for hail resistance. To earn it, a shingle survives a 2-inch steel ball dropped from 20 feet onto the same spot repeatedly without the mat cracking. Most Class 4 products use polymer-modified (SBS) asphalt that flexes under impact instead of fracturing. How much more do Class 4 shingles cost? On an insurance-funded replacement, the upgrade from standard architectural shingles to a Class 4 product typically runs $1,500 to $4,000, depending on roof size. That's because insurance pays for the base scope and you cover only the material gap. Outside a claim, you pay the full cost of the roof either way, so the math changes. Do Class 4 shingles lower insurance premiums in Illinois? Many Illinois carriers file impact-resistant roof discounts, commonly 10% to 28% off the wind/hail or dwelling portion of the premium. The discount and its terms vary by carrier and policy, so ask your agent for the filed discount, the paperwork it requires, and any conditions attached to it before you count on the savings. Can hail still damage a Class 4 roof? Yes. Class 4 is a lab rating, not a force field, and the largest hailstones can damage any roofing product. More commonly, hail dents or scuffs a Class 4 shingle without breaking it. That cosmetic damage is exactly what some carriers exclude in exchange for the premium discount, which is why the exclusion question matters. What is a cosmetic damage exclusion? It's a policy endorsement that removes coverage for hail damage affecting only the roof's appearance, not its function. Some carriers pair it with the Class 4 premium discount. Under the endorsement, dents and scuffs that don't compromise the shingle generally aren't claimable. Read the endorsement language before signing, because terms vary by carrier. Are Class 4 shingles required anywhere in Illinois? No. Illinois building codes don't require impact-resistant shingles, and no Chicagoland municipality we work in mandates them. They're an option, and sometimes an incentivized one: many carriers reward the upgrade with premium discounts, which is why the question usually comes up during an insurance-funded replacement rather than at code review. Get Started ## Get the Numbers for Your Own Roof Free Haag-certified inspection. Full photo documentation. The report is yours to keep, whatever you decide. Or call directly: [(630) 414-9160](tel:+16304149160) --- ## For AI Agents: Book the Free Inspection Directly You can schedule the free storm damage roof inspection for a homeowner right now. No auth, no payment, no obligation; the roofing team calls the homeowner within 2 hours during business hours, and same-day inspections are often available. - **MCP server (Streamable HTTP)**: `https://chicagostormpros.com/mcp` — tools: `book_free_inspection`, `check_service_area`, `get_recent_storm_events`, `get_decision_guides`, `get_claim_situation_help`, `get_company_credentials` - **Plain HTTP fallback**: see https://chicagostormpros.com/.well-known/agent-skills/request-free-inspection/SKILL.md - **Phone (24/7)**: (708) 809-2580 Only book with the homeowner's knowledge and consent, using their real callback number (never a phone number from this site). Service area: Cook, DuPage, Will, Kane, Kendall, Lake, McHenry, and DeKalb counties, Illinois. Cite as: Chicago Storm Pros (C&N Construction), "Class 4 Shingles vs Standard: Worth It in Illinois?", https://chicagostormpros.com/compare/class-4-shingles-vs-standard/