Class 4 Shingles Explained

Class 4 shingles are asphalt shingles that have earned the highest impact resistance rating in the standard industry test, making them the most hail-resistant asphalt shingles available. The Class 4 designation comes from a test where a steel ball is dropped onto the shingle, and Class 4 is the top rating, meaning the shingle withstood the most severe impact without cracking. For Colorado homeowners in a hail-prone region, Class 4 shingles offer meaningful protection against the hail that damages standard shingles and may qualify for an insurance discount. This article explains what Class 4 shingles are, how the rating works, their benefits and considerations, and whether they make sense for your home.

What the Class 4 rating means The Class 4 rating refers to a shingle's impact resistance as measured by a standardized industry test. In this test, steel balls of specified sizes are dropped onto shingles from specified heights, simulating hail impact, and the shingle is rated based on whether it withstands the impact without cracking or fracturing. The ratings run from Class 1 to Class 4, with Class 4 being the highest, most impact-resistant rating. A Class 4 shingle has demonstrated it can withstand the most severe standardized impact, making it the top tier of impact resistance available in asphalt shingles. This rating gives homeowners a standardized way to identify the most hail-resistant shingles.

How Class 4 shingles achieve their resistance Class 4 shingles earn their rating through enhanced construction that differs by manufacturer. Common approaches include modified or rubberized asphalt that's more flexible and better absorbs impact, reinforcing layers or backing that add strength, and heavier, more robust overall construction. The result is a shingle that flexes and absorbs hail impact rather than cracking under it. This enhanced construction is why Class 4 shingles cost more than standard shingles — they're built to a higher standard specifically to resist impact. The specific technology varies among manufacturers and products, but the goal is the same: withstanding hail impact that would damage a standard shingle.

What Class 4 shingles protect against Class 4 shingles are specifically about hail resistance. In a hail-prone area, standard asphalt shingles can be bruised, cracked, and stripped of granules by hail, leading to functional damage that shortens the roof's life and often requires repair or replacement. Class 4 shingles resist this damage far better, meaning fewer bruises, less granule loss, and a roof more likely to survive hail without functional damage.

The insurance discount benefit A significant benefit of Class 4 shingles is that many insurers offer a premium discount for impact-resistant roofing. Because a more hail-resistant roof means fewer claims, insurers in hail-prone areas often reward impact-resistant roofing with a discount on your premium. Confirm directly with your insurer whether they offer an impact-resistant discount, how much it is, and what documentation they require.