Class 3 vs Class 4 Shingles: What Is the Difference and Which Is Right for Your Eastern Shore Roof?

If you have been shopping for a new roof or researching hail damage claims, you have probably seen manufacturers and insurance companies mention “Class 3” or “Class 4” shingles. These numbers come from an industry test for impact resistance, and they matter more than most Maryland and Delaware homeowners realize.

Here is the plain-English breakdown of what Class 3 and Class 4 actually mean, how they differ, and which one is worth the extra cost on the Eastern Shore.

What the classes actually measure

Both ratings come from a lab test called UL 2218. The test drops a steel ball from a set height onto a shingle and looks at whether the shingle cracks or splits from the impact. The higher the class, the taller the drop the shingle survives.

• Class 1: Steel ball dropped from 12 inches (lowest rating, rare in modern products)
• Class 2: Steel ball dropped from 15 inches
• Class 3: Steel ball dropped from 17 inches (equivalent to roughly 1.5-inch hail)
• Class 4: Steel ball dropped from 20 inches (equivalent to roughly 2-inch hail, the highest rating available)

Class 4 is the top of the scale. There is no Class 5.

What “impact resistance” actually does for your roof

A Class 4 shingle is engineered with reinforced asphalt layers, a polymer-modified backing, or a rubberized SBS compound that lets it flex on impact instead of cracking.

In practical terms:

• A Class 3 roof will usually survive small hail (pea to marble size) without damage, but larger hail can crack tabs, dent mats, and cause eventual leaks.
• A Class 4 roof will usually survive moderate hail (up to roughly 2 inches, or about the size of a hen egg) without functional damage. Cosmetic dents can still happen but the shingle seal and water barrier stay intact.

On the Delmarva Peninsula, large hail is rare compared to the Midwest, but it does happen. We have seen hail claims after spring thunderstorm fronts move through Wicomico and Worcester counties almost every year.

The cost difference

For a typical 25-square residential roof (2,500 sq ft of coverage) in the Eastern Shore MD or DE market:

Class 4 shingles typically add 10% to 20% to the project cost. Some product lines (like CertainTeed Landmark Climate Flex or GAF Timberline AS II) are available as Class 4 without a huge premium.

The insurance discount most homeowners miss

Here is where Class 4 pays for itself: most major insurance carriers offer a premium discount of 10% to 35% on the roof portion of your homeowners policy when you install Class 4 impact-rated shingles.

Carriers that routinely offer this discount in Maryland and Delaware include:

• State Farm
• Allstate
• Nationwide
• Liberty Mutual
• Travelers
• USAA (eligible households)
• Erie Insurance

Over a 20-year roof life, a 20% annual discount can cover the entire Class 4 upgrade cost several times over. Always confirm with your specific carrier before installing, and ask them for the exact documentation they need to apply the discount (usually a manufacturer certificate of compliance from your roofer).

Which class should you install on the Eastern Shore?

Use this quick decision tree:

Choose Class 4 if:

• Your insurance carrier offers a Class 4 discount (call and ask before deciding)
• You plan to stay in the home 10+ years
• You have had a hail claim in the last 5 years and want to prevent the next one
• Your home is in an open exposure (waterfront, farm, no tree canopy)
• The project budget can absorb an extra $1,000 to $1,500

Class 3 is acceptable if:

• You are under tree canopy that blocks most hail impact
• You are reselling within 2 to 3 years
• Your carrier does not offer a Class 4 discount and you are on a tight budget
• You are replacing a detached garage or secondary structure

For Salisbury, Ocean Pines, Fruitland, and inland Wicomico County properties, Class 3 handles typical Delmarva weather. For Ocean City, Fenwick Island, Bethany Beach, and other open coastal exposures, Class 4 is the safer spec.

How we handle this at G and Bros

On every roof replacement estimate we provide, we quote Class 3 as the baseline and show Class 4 as an upgrade option with the expected insurance discount spelled out. We are a GAF Certified Plus contractor, which means we install both and we help you contact your carrier to apply the discount before the install.

Learn more about our roof replacement service, or if you have had hail damage, check out our storm restoration page for our insurance claim support.

Get a free inspection and a class comparison quote

The best way to know what your roof needs is a free drone inspection. We show you every slope and valley on screen the same day and give you an estimate with both Class 3 and Class 4 pricing so you can compare.

Ready to compare options for your Eastern Shore roof? Contact G and Bros Roofing today for a free drone inspection. Call (410) 677-4975 or request a free estimate online.