Will a Metal Roof Lower My Home Insurance Premium?
Short answer: often yes, but it varies. Many homeowners see a lower premium after installing a quality metal roof, and some carriers offer a specific metal roof insurance discount for impact-resistant roofing. But whether you get a discount, and how much, depends heavily on your insurance carrier, your state or province, and the exact ratings of the roof you install. There is no universal, guaranteed savings figure.
Below we explain the mechanism behind these credits, the factors insurers actually weigh, and the practical steps to ask your carrier the right way, with the right documentation in hand. You can review the third-party test data insurers ask about on our testing reports page.
Quick Answer
Often yes, but it varies by carrier and by state or province. Many insurers offer a premium credit for a metal roof with UL 2218 Class 4 impact resistance and a Class A fire rating, because those roofs are less likely to generate hail, wind, or fire claims. Any discount is set by your insurer, is not guaranteed, and usually must be requested with documentation.
Why insurers care about your roof at all
Your roof is your home's first line of defense, and roof-related claims from hail, wind, and fire are among the most common and most expensive claims insurers pay. When a roof resists those perils, the insurer's expected payout over the life of the policy goes down. Lower expected risk is what can translate into a lower premium or a dedicated discount.
Two performance ratings do most of the heavy lifting here: impact resistance and fire resistance. A premium aluminum roofing system is engineered around both. Because aluminum will not rust and is non-combustible, it also addresses the material-durability and corrosion questions underwriters ask when they estimate how long a roof will keep performing.
The mechanism: impact and fire ratings
UL 2218 Class 4 impact resistance. UL 2218 is the industry-standard test for impact, think hail. A steel ball is dropped onto the roofing material from a set height; a Class 4 rating, the highest, means the material withstood the most severe impact in the test without cracking or splitting. Many insurers, especially in hail-prone regions, offer a premium credit for roofs carrying a Class 4 rating because they are statistically less likely to generate a hail claim.
Class A fire rating. ASTM E108 / UL 790 classifies a roof's resistance to fire exposure from outside the building. Class A is the highest rating and indicates the greatest resistance to fire spread. In wildfire-exposed areas, a Class A roof can be a factor in both insurability and pricing.
Interlock's aluminum system is engineered to carry both a UL 2218 Class 4 impact rating and a Class A fire rating (as an assembly), the two credentials most commonly tied to roofing-related insurance credits. You can review the underlying documentation on our testing reports page.
How much can this be worth? Publicly reported figures for impact-resistant roof discounts commonly fall in the range of roughly 5% to 35% off the wind/hail or overall premium, but this range is illustrative only. The actual number is set by your carrier and your state's filed rates, and in some cases the discount applies only to a portion of your premium (for example, the wind and hail component) rather than the whole bill. Treat any percentage as a starting point for a conversation with your insurer, not a guarantee.
Factors insurers weigh
A metal roof's ratings are only part of the picture. Here are the main factors that influence whether, and how much, your premium changes:
| Factor | Why it matters to the insurer | Where a metal roof helps |
|---|---|---|
| Impact rating (UL 2218) | Predicts hail-claim likelihood | Class 4 is the highest rating available |
| Fire rating (Class A) | Predicts fire spread and total-loss risk | Non-combustible metal typically achieves Class A |
| Wind resistance | Predicts wind uplift and blow-off claims | Interlocking panels are rated up to 120 mph |
| Roof age & expected lifespan | Older roofs fail more often | A new 50+ year roof resets and extends the clock |
| Material & corrosion resistance | Durable materials mean fewer claims | PVDF-coated aluminum resists rust and corrosion |
| Local peril profile | Hail, wildfire, and wind exposure drive base rates | Impact and fire ratings matter most in high-peril zones |
| Carrier & state/province rules | Discounts must be filed and approved | Availability varies, so confirm with your carrier |
| Documentation on file | No proof, no credit | Manufacturer test reports substantiate the ratings |
Notice the last row: even a roof with perfect ratings won't earn a discount if the insurer never receives proof. Documentation is where many homeowners leave money on the table.
How to ask your insurer, and what documents to request
You generally have to ask; discounts are rarely applied automatically. Here's a practical approach:
- Call your agent or carrier and ask directly whether they offer a premium discount for an impact-resistant (UL 2218 Class 4) and Class A fire-rated roof, and what documentation they need.
- Ask which rating drives the credit in your state or province (impact, fire, wind, or a combination) and whether it applies to your whole premium or only part of it.
- Request the discount in writing and confirm the effective date, since some credits apply only at renewal.
- Provide the documentation below so the underwriter can verify the ratings.
Documentation to gather and provide:
- Manufacturer testing reports showing the UL 2218 Class 4 impact rating and the Class A fire rating.
- Product data sheet identifying the specific aluminum roofing system and material.
- Your installation invoice or contract showing the install date and installing contractor.
- Your warranty documentation, including the transferable Lifetime Warranty.
- Photos of the completed roof, if requested by the underwriter.
Keep copies of everything. If you switch carriers later, having this package ready makes it easy to request the same consideration from a new insurer. A certified Interlock installer can help you assemble the specification and warranty paperwork.
A realistic set of expectations
Some homeowners see a meaningful premium reduction after installing a rated metal roof; others see a modest change or none at all, depending entirely on their carrier and location. A metal roof can also help in ways that don't show up as a line-item discount, for example, staying insurable in a market where carriers are tightening standards on older or higher-risk roofs. The durability, impact resistance, and fire resistance are real, permanent benefits of the roof itself. Whether they convert into a lower premium is a decision only your insurer can make. For the bigger financial picture, see whether a metal roof is worth it and how long a metal roof lasts.
Important: this article is for general educational purposes only and is not financial, legal, or insurance advice. Interlock Metal Roofing does not sell insurance and cannot guarantee any premium reduction. Discounts, eligibility, and amounts are set solely by your insurer and vary by carrier, policy, and jurisdiction. Always confirm all details directly with your insurance provider.
Frequently asked questions
Common questions homeowners ask about metal roofs and insurance premiums. Remember that answers are general and not insurance advice; confirm specifics with your carrier.
Do insurance companies give discounts for a metal roof?
Many do, but it is not universal. Some carriers offer a specific credit for impact-resistant (UL 2218 Class 4) and/or Class A fire-rated roofing, particularly in hail, wind, or wildfire regions. Availability and amount depend on your carrier and your state or province, so ask your insurer directly. Discounts are not guaranteed.
How much can a metal roof lower my home insurance premium?
Publicly reported discounts for impact-resistant roofs commonly fall in a range of roughly 5% to 35%, but this is illustrative only. Some carriers apply the credit to your entire premium and others only to the wind and hail portion. Your actual savings, if any, are set by your insurer and vary by location and policy.
What roof rating qualifies for an insurance discount?
The two ratings most often tied to credits are a UL 2218 Class 4 impact rating (the highest hail-impact class) and a Class A fire rating (the highest fire-resistance class). Some carriers also consider wind ratings. A premium aluminum system like Interlock's is engineered to carry both Class 4 impact and Class A fire ratings.
What documentation should I give my insurer?
Provide the manufacturer's testing reports showing the UL 2218 Class 4 and Class A ratings, the product data sheet, your installation invoice or contract with the install date, and the warranty documentation. Underwriters may also request photos of the finished roof. You can find the test documentation on our testing reports page.
Does a metal roof always lower insurance premiums?
No. A rated metal roof can reduce risk, but a discount is never guaranteed. Some homeowners see a meaningful reduction, some see a small change, and some see none, depending on their carrier, state or province, and local risk profile. Confirm with your insurer before assuming any savings, and note this is not insurance advice.
How do I ask my insurer about a metal roof discount?
Call your agent or carrier and ask whether they offer a premium credit for an impact-resistant and fire-rated roof, and what documentation they need. Ask which rating drives the credit in your area, whether it applies to your whole premium, and request confirmation in writing along with the effective date.
Does the discount apply right away or at renewal?
It depends on the carrier. Some apply a mid-term adjustment once they verify your roof's ratings, while others apply the credit at your next renewal. Ask your insurer to confirm the effective date in writing when you submit your documentation.
Is a metal roof discount the same in the U.S. and Canada?
Not necessarily. Insurance is regulated at the state and provincial level, so discount availability, eligibility rules, and amounts differ across jurisdictions and carriers. The underlying benefits of the roof are the same, but how they are priced into a policy varies. Always confirm with your local provider.
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Last updated July 11, 2026 · Reviewed for accuracy by the Interlock SEO Desk.