Architectural Asphalt Shingles

Asphalt Shingles: Class 3 Vs Class 4 Impact Resistance Explained

Class 3 Vs Class 4 Shingles

Understanding The difference For Your Home

Architectural asphalt shingles come in two primary impact resistance grades for residential applications in hail-prone areas: Class 3 and Class 4. Class 4 is the higher rating, indicating the shingle has passed a more rigorous steel ball impact test, and in Minnesota it often qualifies for homeowner's insurance premium discounts that partially or fully offset the higher upfront cost. For most homeowners in Coon Rapids, the question is not whether to choose architectural shingles but which impact rating makes sense for their situation.

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The difference in asphalt shingles

Determining the right type of shingles for your family

What Architectural Shingles Are And Why They Replaced 3-tab

Architectural shingles, also called dimensional shingles, are the current standard product for residential roofing. They replaced 3-tab shingles as the baseline because they are thicker, heavier, and have a laminated construction that creates a dimensional appearance and better performance against wind and impact. A 3-tab shingle is a single layer; an architectural shingle is two layers bonded together, which gives it more body and more resistance to the conditions that cause shingle failure.

The Impact Rating System

The Underwriters Laboratories UL 2218 standard tests shingles by dropping steel balls of increasing size from a fixed height and evaluating the resulting damage. Class 1 is the lowest rating. Class 4 is the highest, requiring the shingle to resist cracking or fracturing when struck by a 2-inch steel ball dropped from 20 feet. Class 3 uses a 1.75-inch ball at the same height. The difference in real-world terms is meaningful in hail-prone regions because Class 4 shingles withstand more impact energy without damage.

Possible Insurance discount Qualifications

Many insurance carriers offer premium discounts for homes with Class 4 impact-resistant roofing installed. In Anoka County, where hail activity is meaningful, these discounts can be significant enough to offset a portion of the cost difference between Class 3 and Class 4 products over a few years. Contact your insurance carrier before your installation to ask about available discounts, and confirm the specific products they recognize as qualifying.

Major Manufacturers and What Certification Means

GAF, CertainTeed, and Owens Corning are the three dominant manufacturers of architectural shingles in the residential market. Each has a certified contractor program that unlocks enhanced warranty products not available through uncertified installers. GAF Master Elite, CertainTeed ShingleMaster, and Owens Corning Preferred Contractor are the top tier designations. Enhanced warranty products typically extend coverage on both materials and installation, which is a meaningful difference on a product rated for 25 to 30 years.

How to Decide: Class 3 vs class 4

If your carrier offers a meaningful discount for Class 4 shingles, the math usually favors the upgrade. Calculate the premium reduction over a five-year period and compare it to the cost difference between Class 3 and Class 4 options. In most cases in Anoka County, the upgrade pays for itself within two to four years through reduced premiums. If your carrier does not offer this discount, Class 3 architectural shingles remain a strong product for the application.

What this means for you

How timber exteriors approaches roof replacements

ways we can help:

Provide A Thorough 16-Point Inspection: It’s almost impossible to spot most roofing problems from the ground. Our team walks the entire property, including the attic, to fully inspect the roof, identify any potential risks, and understand the full scope of your property.

Detailed Reporting & Documentation: We capture detailed photos and compile them into a clear report. After the inspection, we explain our findings in simple terms and walk through repair and replacement options so homeowners can make informed decisions without pressure.

Project Planning & Communication: Before work begins, we review timelines, materials, scheduling, and project expectations so homeowners always know what comes next during the process.

Final Walk-Through & Ongoing Support: Once the project is complete, we perform a final walkthrough, answer any remaining questions, and remain available for future support and maintenance needs.

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FAQs

Questions to Ask Before Calling

Do Class 4 shingles look different from Class 3?

Not significantly. The dimensional appearance and color range of Class 4 products is comparable to Class 3. The difference is in the construction and material weight, not the visible surface. You are not trading aesthetics for performance when you upgrade.

Are Class 4 shingles worth it on an older home in Coon Rapids?

If the rest of the roof system is being replaced and your carrier offers a discount, generally yes. The product itself performs better in hail events, and the insurance discount compounds over the life of the installation. On a partial repair where only a section is being replaced, matching the existing material is usually the priority over upgrading to Class 4.

How long do architectural shingles last in Minnesota?

25 to 30 years under manufacturer ratings for products installed on a correctly ventilated roof. Ventilation is the variable most homeowners underestimate. Inadequate attic ventilation traps heat and moisture that accelerates shingle degradation regardless of the product's rating.